s13 sr20det cam wont stay to aling timing marks

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dsastr_clan
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Joined: Wed Jul 27, 2005 11:24 am
Car: 240sx

s13 sr20det cam wont stay to aling timing marks

Postby dsastr_clan » Tue Dec 08, 2020 12:14 pm

Hello, I have a s13 sr20det. I took the head out to get it resurfaced, cleaned and check. Im doing the headgasket. So, i don't know if this is an issue but wanted to check with ya all.

I'm trying to align the sprocket timing mark at 10 and 12 clock but the exhaust one don't want to stay at 12, it rolls back to 11 or 1. Do you guys ensure that the cam stays in place so I can put the chain back on?

Would it be ok if just hold it and put the chain around? or should it stay at 12 o clock mark and there is something wrong with the head?


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VStar650CL
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Joined: Thu Nov 12, 2020 1:25 pm
Car: 2013 Nissan Altima 2.5 SL
2004 Nissan Altima 2.5 S

Re: s13 sr20det cam wont stay to aling timing marks

Postby VStar650CL » Tue Dec 08, 2020 12:34 pm

Line it up and then pinch the chain with zip ties till you get the tensioners in so it can't jump teeth.

dsastr_clan
Posts: 169
Joined: Wed Jul 27, 2005 11:24 am
Car: 240sx

Re: s13 sr20det cam wont stay to aling timing marks

Postby dsastr_clan » Tue Dec 08, 2020 12:53 pm

VStar650CL wrote:
Tue Dec 08, 2020 12:34 pm
Line it up and then pinch the chain with zip ties till you get the tensioners in so it can't jump teeth.
ahh, that's such a good idea. Do cams tend to do that? I didn't have this issue I pulled the head. Both cams were at 10 and 12.

I know they took them apart to inspect and clean them

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VStar650CL
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Car: 2013 Nissan Altima 2.5 SL
2004 Nissan Altima 2.5 S

Re: s13 sr20det cam wont stay to aling timing marks

Postby VStar650CL » Tue Dec 08, 2020 1:51 pm

If they're partway on or off a cam lobe, then yes, they try to creep back or forward from the pressure of the valve springs. Depends on the engine and the cam, some are more prone to move than others.

dsastr_clan
Posts: 169
Joined: Wed Jul 27, 2005 11:24 am
Car: 240sx

Re: s13 sr20det cam wont stay to aling timing marks

Postby dsastr_clan » Wed Dec 09, 2020 11:41 am

VStar650CL wrote:
Tue Dec 08, 2020 1:51 pm
If they're partway on or off a cam lobe, then yes, they try to creep back or forward from the pressure of the valve springs. Depends on the engine and the cam, some are more prone to move than others.

Thank you!

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VStar650CL
Posts: 2693
Joined: Thu Nov 12, 2020 1:25 pm
Car: 2013 Nissan Altima 2.5 SL
2004 Nissan Altima 2.5 S

Re: s13 sr20det cam wont stay to aling timing marks

Postby VStar650CL » Wed Dec 09, 2020 11:51 am

You're most welcome, happy to help.


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