Timing Chain Markings

[Frankae86]

Ill be rebuilding my Sr and have never done a timing chain engine before, this thread makes it sound difficult.

[nissan_doctor]

Ill be rebuilding my Sr and have never done a timing chain engine before, this thread makes it sound difficult.

Its actually really easy. If you clean down your chain you will see 2 silver links and one black one. The two silver ones line up with the two cam sprocket marks and the black one with the crank sprocket mark.

Have you got a workshop manual? you'll need to know how to set the cam angle sensor too.

[Frankae86]

Ah ill be alrite lad, not ripping it up for a while yet cheers anyway. If ive any questions ill let ye know.

[ae86f20c]

The marks are only for when fitting the chain. Once the engine has been rotated then you'll nearly never get them lined up correctly again with the colours on the chain.

You should have 20 rollers between the two cam sprocket marks, 56 rollers from the intake cam mark to the crank mark and 48 rollers from exhaust sprocket to crank mark.

Thanks lad thats great info. Ill go counting 2moro. It does take a good few rotations to get the links lining up with the cam sprockets. Takes nearly 5 full cycles of the chain.

BUT.... As you say there's 48 rollers between the exhaust sprocket and crank sprocket [mark to mark] on the tension side, then its hard to imagine why the chain links and sprocket marks dont line up because surely there's 48 rollers from silver coloured link to yellow/black coloured link on the chain and the engine is at TDC both now the when the chain was fitted?

I dunno - depends on what rotation its stops on as u say. Cos the crank sprocket is diff diameter to cam sproc.... this takes abit of thinkin...

Thanks for the help lads.. ill try get pics up moro eve.

[way2fastforu]

u should def download a work shop manual specially if its ur first time workin on an sr20....but there actually fairly simply to work on really....wen i first done head gasket in mine i thought the chain was a nightmare but got used to it an its simples really

[nissan_doctor]

Here you go.....

http://www.importworkshop.com/files/...hop_Manual.pdf

[ae86f20c]

So overall of timing chain



Both black links lineing up with Cam sprocket marks,



So crank shaft is at correct rotation as key way is pointing 12 o clock. So engine is at TDC. But the crank sprocket mark is not in the same position as it is in the nissan manual. but the yellow chain link is correct.



On the above manual pic the crank sprocket mark is at 4 o clock when the keyway is at 12 clock,

BUT... on my engine the crank sprocket mark is at 6o clock when the keyway is at 12 o clock,

Can some1 tell me should the crank sprocket mark be opposite the keyway? or what does it look like on theres if any1 has 1 ripped?

[nissan_doctor]

The mark you are looking at now is on the oil pump drive(the round peice with the 2 flat sides)Remove that and the cam sprocket is behind that. You should see the mark your looking for then.