Timing Chain Markings

[diff06]

Thanks lad, but my problem is that before I take off the chain.
The 3 marking aren't lining up with the 3 coloured chain links at the same time. When piston 1 is at TDC my top two black links line up with the cam sprockets, but the bottom yellow link is 1 link out from lining up with the crank sprocket mark.

I can prob work away the build engine and then line it up the correct way afterwards, but i just wanted to know if the engine jumped a link or not before i rip it apart now?

sounds like it did

[mr.jailbait]

has to be fixed now
cant do it with the oil pump on

[nissan_doctor]

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.

[Davie]

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.

fucker

off topic but ring me when those tyres arrive,they were dispatched yesterday

[nissan_doctor]

fucker

off topic but ring me when those tyres arrive,they were dispatched yesterday

Will do...

[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.

[way2fastforu]

ya like nissan doc said...sure it takes fookin ages jus to get the 2 cam sprockets lined up wit the silver chain links never mind the crank wit the gold link

[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