In between the engine and the fan shroud is the spot on SR20 engines, and with better light than in the photo, you will be able to see pulleys. I gotta 97 usdm sr20 and know that the marks on the cam gears should line up with the dark links of the chain but they(intake and exhaust) are both off by three teeth each. The result is the piston rattling from side to side, which after not too long has the nasty effect of smashing the rings on the piston. 12303-54C00 N14-SR20DET We are comparing two different sized circles at very close distance having difference only 2cm/0.7874". Forums state to buy a spark plug lead for $5, remove the rubber from one end and then insert it between the spark plug and coil pack. This is located in the same place as the distributor cap on non turbo engines: on the front right of the cam cover, directly above the coolant line. Idles a little weird n all but i don't feel as if it is running at the potential it should be running with s4's. It's the top bolt that is stripped. If you want to change the ignition timing, then you must turn of the engine and disconnect the Throttle Position Sensor. This is different to adjusting the ignition timing in the ecu, which varies according to load and rpm, but it will affect it directly. Turns out, as a member pointed out, my timing was off on my JZFC. either use a die and clean the threads if its not that bad, or take out the stud with double nut or vise grips. Two tips are to use the highest octane fuel available as this will increase the engines resistance to detonation, and to make little changes at a time until the final setting is known. Start your engine and let it warm up to normal operating temperature. The danger however, is that the engine will be closer to detonation, which spells doom for any engine. It should be noted that it inaccurate to set the timing to 15 degrees BTDC. CHECK!!! Done! Several designs are outlined on www.autospeed.com.au, one of which I made with the provided instructions. I had Nistune open, watching the timing readout (left hand column, three down). Seat of the pants impression is slightly increased ability to rev, and a tad more throttle response. The pulleys are aligned using the notch they have as they should look upon installation on the crank. For the SR20DE, the timing marks are as pictured. This will result in loss of compression and increased oil consumption, if the engine will run at all. So is the actual stud part of the block or can i turn the stud out sorta like an exhaust manifold stud. if you dont know how to properly reference the cams and do the job get someone that lives around you off the forum to help you. The timing mark on the crank pulley may be hard to see; a dab of white paint down inside the mark (wipe off the excess) can help here. Post Reply . The marks should be made by aligning this template so that zero is at the top of the pulley where the crankcase split line is located. Have you looked at the timing marks on the lower timing cog to oil pump and compared the relation of the marks on the pulley to lower cover? Restarting the car with everything plugged in again had the idle back to 850 rpm where it should be. The best crank timing mark is to line the mark between the two dots on the crank sprocket. Or are the timing marks the same on a 170 and 200 engine? Using a ratchet on the crank pulley, hand crank the engine until the #1 piston is at TDC. Using a Q-tip or similar dobber, use WHITE paint to FILL the notches. Two 12 mm bolts are used to hold the swivelling piece in place. Page 1 of 2 - Crank Pulley Timing Marks Query - posted in MX-5 / Roadster Forum: Is it possible to put the crank pulley that has the timing notches on it on wrong? All four cylinder (CCW) hondas I'm aware of with cyl. The marks and chain link colors are not needed, if you understand what you are doing. Like the SR20DE engine, the TPS needs to be disconnected and the engine revved about 3000 rpm three times to lock the timing. Josh Steele will run these pulleys on his 2010 S13 drift car. Only the lines are visible, so this picture is a handle guide to the actual values of the lines. if u ever done a cam job or degreed the cams you would know something like that. im pretty sure if you were off by 3 teeth you would have bent valves. Could the FSM be wrong? Last time I checked the timing was probably 5 or so years ago when I changed the timing belt, tensioner, water pump, rebuilt the distributor, ETC. Detonation is uncontrolled pre-ignition in the combustion chamber, where at least one additional flame front ignites with disastrous consequences. Did u cock the tensioner back , or did u just try to jam it in there? wow.....every 4 rotations or so your cams will line up with all of the marks. Tried to check timing today and when I point the timing light down at the crank pulley instead of the timing marks appearing to "stand still" they look like they are slowly rotating counter clockwise. The inductive clip is often fragile, so take care. Are they the same as the SR? This picture shows where the timing light is to be pointed, as shown in the picture above. After a decent drive and Nistune reporting the coolant temperature at 86 degrees C, the reading was more reliable. A sticker like the one pictured may be found somewhere in the engine bay, and the ever important factory ignition timing setting. Can someone explain the timing marks on the RB25 crank pulley? I would justify any minor difference between the marks through the size but it would be MINOR on this range. Thanks.- Jay. This is because the engine must be at its correct idle speed for the timing light to be accurate. Anyone with a 20V able to confirm when they've set the timing or have one sitting on a stand waiting to go in? During use the timing light does not rest in position shown (centre highlight), this is just for illustrative purposes to show where to point the light. The marks will be on one of the belts or pulleys. There is a loop at the rear of the cam cover for attaching the timing light pickup, although the internet seems to think this is unreliable, despite the FSM telling us to use it. The crank pulley timing marks should be at the 2nd to the left mark while the notches on the exhaust cam sprocket is pointing perpendicular to the surface of the cylinder head, or at about the 12 o'clock position. Due to mixing and matching the VVL FWD and SR20DET RWD conversion parts, the timing marks will not align correctly with the VVL oil pump when using the RWD crank pulley. I personally found the readings the same. The unit pictured cost me around $50 and is a basic timing light. I used the crank pulley from my 63 on the 200 motor as I needed only one pulley where as the 66 had two pulleys. The base ignition timing is controlled by the distributor on the SR20DE. After, it was locked at 22. the timing marks on the ur pulleys are not correct. Quote; Post by JonPowell » Thu Jan 22, 2004 3:56 am . Its funny how people say you are wrong , but the way they describe it or do it is just different. so ive decided to do the timing chain on my SR20DET (redtop), now on the cam gears, there are 2 circles, can anyone please help and tell me where they are … 4. Come join the discussion about performance, builds, turbos, modifications, troubleshooting, maintenance, and more! alright. Re: Crank Pulley Timing Mark ? This is highly recommended for the safety of your engine. when you are on tdc on cyl. Step 2 states “temporarily install the pulley bolt” to be able to turn the crankshaft. You must rev the motor three times to above approximately 3000 rpm, which settles the computer for the change. Before the car was properly warmed up, the reading was around 40 degrees BTDC. SR20DET Forum (rear-drive) How to set your SR's timing in 30 minutes or less. I took off my valve cover and at TDC the cam gears are not lined up with the chain. The easiest form of identification is a metallic rattling sound that is not entirely consistent with engine rpm. alright here's the deal...I installed s4's and now i know my cam timing is off. -----Many after-market degree wheel pulleys are wildly inaccurate, being off by as much as five degrees. Note that base bolts are those required to be loosened, not the screws or bolts which hold on the distributor cap on. Is this normal? Advancing the timing has the effect of increasing the efficiency of the engine by optimising the timing of the spark. For the SR20DE it is 15 degrees BTDC. Not so loose the unit will move by itself, but just loose enough so that it will turn by hand. It should be obvious which is correct though, as the hole in which the bolt resides should be an arc, therefore allowing adjustment. Could there be more than 1 version/series of the pulley? "A couple of Nissan Sr20's will pull a premium one week before race wars." I'm just trying to get it to factory spec, and really see how s4's are supposed to feel. After speaking with a friend I decided to further advance the ignition timing to 25 degrees BTDC. Once the desired setting is selected, turn off the engine, tighten the bolts and connect the TPS and then double check the timing again to make sure it hasn’t moved. Another cause of detonation is lean fuel mixtures, which raises cylinder temperatures dramatically. You dont have to pull the pans and everything!just valve cover and tensioner. http://jimwolftechnology.com/wolfpdf/CAMINSTALLINSTFORSR20.PDF, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Post by … It was funny cause I was lifting a car the other day at school and people were like,"No, thats not how u do it!". In lobe will be roughly at 4 or 5 o'clock position and the exhaust will be at the 7 or 8 o'clock position. NST Two Row SR20DET Crank Pulley. For the RWD SR20DET cars! Modern engines usually use a crank sensor directly connected to the engine management system . looking from the front of the motor the two lobes will face towards each other and down as in overlapping. This can be verified by looking at the crank pulley and the cam sprocket position. The timing can be adjusted by loosening and slightly rotating the distributor in its seat. Man this car is givin me more n more problems. Turbo SR20 engines are different in that they have a coil on plug arrangement instead of a distributor cap. For the SR20DE, the timing marks are as pictured. The timing light pickup can then have take a reading without other influences present. The timing mark on my pulley appears to be approx 45 degrees away from the key-way in the anti-clockwise direction. I never struggle the car up hills in high gears either, some similar sympathy may be required. Hee hee, I said "cock". Connect a stroboscopic timing light to No.1 cylinder spark plug lead. Most dampers timing marks line up with the key-way". The non-A/C cars used smaller crank pulley and a larger water pump pulley and the A/C cars used a smaller water pump pulley and a larger crank pulley. JavaScript is disabled. 63FuturaRag Registered User Posts: 123 Joined: Thu Nov 16, 2006 3:40 am Location: Middle Tennessee. Crank pulley … It can be hard to hear whilst driving, as the many other sounds around may drown it out. Title: SR20.PDF Author: none Created Date: 7/30/2001 11:17:27 AM the rim of the crankshaft pulley. Only the lines are visible, so this picture is a handle guide to the actual values of the lines. Replace the spark plug, distributor cap and reconnect the battery. While you're in there, you may as well get a new chain, tensioner, and guides, and if the pulleys look damaged, get them, too. After warmup, your engine should be idling around 850rpm - check your timing with a timing gun. its in a rwd sr20dett going into my 240sx. Verify that the timing dark grey chain markings all mate up with the sprocket notches and the exhaust dowel is 12 o’clock while crank pulley is 2nd notch (1st piston TDC). Considering the timing light is the only cost and be used on any car, and that the timing can be changed an infinite number of times, I feel the modification was worth while. It is obvious then that detonation must be avoided at all costs. Website AOL. Clip the positive and negative leads onto the battery terminals (left highlight), and put the last clip around the wire going to cylinder number one (right highlight). Seat of the pants impression is that the car has that little bit more pace up top, jut enough to warrant the settings to be permanent. Is this all you have to do to set timing? These should be available from generic automotive stores such as Auto 1, Super Cheap Auto, Repco, etc. Then just get another stud or use a bolt. Turn on ignition switch. 15 degrees btdc is the second mark from the right looking at the motor from the front. I'm not sure if y'all understand what im trying to say or do but any input would be nice! Fitting the light is simple. Repeat as needed to obtain the best setting. Now with one hand on the loosened distributor, and the other working the timing light, turn the distributor slowly to see the timing change before your eyes. If the base timing is forward 3 degrees, then the actual timing will be 21 degrees BTDC. I rectified this and was very pleased to find that it gained a fair bit more power. Stock factory timing is at 15 degrees, which is the 2nd to last mark on the crank pulley. A fixed notch will protrude above the markings on one of the pulleys. Start the engine and make sure it is up to the correct operating temperature before measurement. I just bought a timing light but not sure if i should just put the cam gears back to line up with the dark links or if maybe the chain has slipped the cam and crank gears by three teeth all together. At TDC its at the second from the left mark. sr20det timing chain marks so ive decided to do the timing chain on my SR20DET (redtop), now on the cam gears, there are 2 circles, can anyone please help and tell me where they are supposed to be, like both top dead center?, or both of the circles facing eachother, or both pointing in a certain direction?, theres a yellow link on the timing chain, or is this irrelevant to the timing. Yeah, I understood what you said. Before this process, the timing was fluctuating from 22 to 26 degrees BTDC. The FSM says 0 (pink),5,15,22 but the space between 0-5 is bigger than the space between 5-15 on the pulley itself. This sounds silly, but has been like this for a few thousand kilometres now without trouble, with varying weather as well. n1zm0. I was like,"OK, which one of the many lift pionts do you want to lift the car from?". Another issue was that advancing the timing raised the idle, which sometimes would put it high enough to trigger the VTC, and throw the whole thing forward quite a bit. Also use the same series timing chain cover and balancer to properly line up your timing marks. Before starting the car, don’t forget to pull all wires out of the way of moving engine components. Any quick ideas??? i dont understand whats confusing about cylinder 4? At TDC its at the second from the left mark. I have a unorthodox crank pulley and it's got the five timing marks but im not sure how to line it up. (Johnny Tran, fast and furious) LOL. If you're truly at bdc with the pulley at tdc there's no telling what random pulley you have. I personally advanced my ignition timing to 20 degrees BTDC, which has ran perfectly for months now. Please note that 98 octane unleaded petrol is now always needed for safety. Sponsored by Wiring Specialties. The crank pulley has been known to slip round on the hub giving a false indication, as the pulley locating key is very small and it is possible to damage it when refitting, again resulting in an incorrect timing mark position. Say at 4000 rpm at 100% load (open throttle) the mapping inside the ecu might electronically run the car at 18 degrees Before Top Dead Centre. I figured this should be a new topic as it would quickly be answered as it is very simple.. for those who know how. I just bought a timing light but not sure if i should just put the cam gears back to line up with the dark links or if maybe the chain has slipped the cam and crank gears by three teeth all together. If so we’re all good! View Full Version : sr20det timing chain marks. The 15 degree mark is three marks ahead of the red TDC stripe on the pulley. Are the timing marks on the pulleys in the same position? turn the motor over until they all line up. If you want to be super paranoid, follow the Tomei diagram and count the teeth from the edge to the notch tooth. To change the timing, the bolts holding the distributor to the engine need to be loosened. Top. I have a unorthodox crank pulley and it's got the five timing marks but im not sure how to line it up. With the new large muffler in place I felt confident to advance it the full 5 degrees of correction, although another dyno run will be needed soon to ensure all is well. Timing is adjusted by rotating the crank angle sensor instead. APEXi APEXi 507-N004 Dual Funnel Power Intake Kit … 1 at tdc will have the keyway in the crank facing up with the tdc mark of the acc. I drove it for about 500 miles like that so does anyone think i could have f*cked up my s4's??? To remedy this problem, I turned to the Nissan SR20VE/NEO VVL swap parts specialists known as … For the SR20DE it is 15 degrees BTDC. To not deform the bolt, a better practice is to use the Oil Pump Drive and Crank Pulley to turn the Crankshaft. A sticker like the one pictured may be found somewhere in the engine bay, and the ever important factory ignition timing setting. PDA. 1 you are on overlap on cylinder 4 its as simple as that. To simply check the timing neither will be needed to be altered, as you will be essentially taking a measurement. JonPowell Posts: 1522 Joined: Tue Feb 18, 2003 2:06 pm Car: Cars, Music, My family Contact: Contact JonPowell. My car was set to about 17 degrees when it should have been 22. The timing marks are on the front of the engine. Not very good for power production. The same timing chain cover was used for both ‘64 & ‘65 and had just a simple pointer. when you are on tdc the two cam lobes on cyl 4 will point towards each other. I'd assume that the position of the mark, relative to that of the key-way would be common across all Stags? This will be the only wiring going into the throttle body, so it should be easy to spot, if not easy to access. As can be seen, the ECU is wanting 22 degrees so blindly setting it to 15 would have the base timing retarded by 7 degrees. When using the VVL front cover, the timing pin is shorter, so it places the marks on the opposite side of the RWD pulley. To make the marks easy to read, give the pulley a spritz of black paint. The stamped metal protective plates around the crank aux drive pulley and crank timing belt cog have to be removable with the engine in-place to allow changing of the timing belt without removing the engine crank pulley. The second from left is coloured slightly yellow, but this may be hard to see. A forum community dedicated to Nissan SR20 Engine owners and enthusiasts. Got some issues with confirming the timing marks on the crank pulley. Pull the trigger on the light to see the markings and read the timing setting. A rev of the engine settled the rpm back down for the final reading to take place. The NST SR20DET Crank Pulley drives two belts, eliminating the middle row! The recent dyno run informed me that it would gain 7 rwkw from only 2 degrees of timing. I believe they … you should take a rod or a dial indicator and stick it down the spark plug hole and see where it stays up. The Nissan SR engine is a 1.6 L (1,596 cc), 1.8 L (1,838 cc) or 2.0 L (1,998 cc) straight-four, four-stroke gasoline internal combustion engine manufactured by Nissan Motors.It has an aluminum head and block with steel sleeves and has a DOHC 4-valve design, with variable valve timing on select models. All accessories should be off, including stereos, air conditioning and headlights. PyR0NiAk Posts: 4447 Joined: Sun Mar 01, 2009 4:29 pm Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods Location: Ohio … I did this! The nut just keeps turning. The piston may still be travelling up the bore in its compression stage, and is suddenly met with the force of the flame fronts trying to push it downwards, leaving no where for it to travel. Timing is adjustable with both a distributor and a crank angle sensor by rotating the unit. Im not sure if the yellow mark(crankshaft mark) is lined up or not but my car seems to run fine. one way to know that you are on tdc and the cams line up is to rotate the crank and put it on tdc, while watching the IN/EX lobes on cyl. Yeah, time it on any cylinder, 1 through 4, if you know what you are doing. Once it is disconnected, start the engine and make sure it is still up to temperature. Before you can ever think about checking the timing, you have to borrow or buy a timing light. Thanks, Chuck. Most of the time this flame ignites too early and then collides with flame produced originating from the spark plug. the chain only lines up exactly every few thousand revolutions, not every single one. to make sure they are set right, you have to re-set the chain manually, by purring the timing cover, which requires pulling the tensioner, upper and lower pans, and crankshaft pulley. These were cast with number 9773371. Print view; 3 posts • Page 1 of 1. that will be your true tdc. Detonation resulting from this can be intense enough to melt pistons. This works like an extension cord for household electricity. i have one of their pulley and the tdc does not line up. Go to TDC on hte block, and check your marks on the timing gears, see if they are in the correct O'clock position. It may seem daunting after reading about the severe impact of detonation, but good gains can be made if the process is performed carefully. The notch on the pulley is only an APPROXIMATION of TDC, provided as a convenience … Using your thumb or similar tool, wipe off any excess paint. Although the water temp gauge had lifted, the reading was way more advanced than I expected and I was even entertaining the possibility of the timing chain being out 1 tooth. The further forward is set, the more power the engine will make, and responsiveness will also be improved. This is all that is required, so try and get the best value for your money. The term can also be used to describe the tick marks along the length of an optical mark recognition sheet, used to confirm the location of the sheet as it passes through the reader. Other engines may be controlled by a Crank Angle sensor, which works on a similar principle. Advancing the base ignition timing is a simple modification that can be done to almost any car. Special microphones can be made for little cost that clip onto the engine block, and amplify the sound for the listener. 07-14-2005, 07:58 PM. Mark the pulley at the 0, 7.5, and 30 degree points. its really easy to do and you will f*ck it up if you dont know what you're doing...especially for the first time. So i finally found some time in between work and school to do adjust the cams but now the belt tensioner bolt is stripped. Beyond.ca - Car Forums - Automotive Enthusiasts Community > Car Forums > Performance and Handling > Mechanical > sr20det timing chain marks. NST crank pulleys are of the highest quality, include proper timing marks, stainless sleeves on the backside of the pulley, and are HARD-ANODIZED for exceptional durability…. For a better experience, please enable JavaScript in your browser before proceeding.