View Full Version : Clanking, tapping sound right beneath valve cover...any ideas?

01-01-2002, 02:14 AM
Hey all...
Just tonite my car started to make a tapping sound right beneath the valve cover.

I could feel the tapping on the valve cover when I touch the cover.

Any clues...I have a FSM and will probably work on it this week.

'97 S14 SE Turbo
01-01-2002, 02:17 AM
There's a possibility that your engine was built before Nissan removed the chain guards. Pull the valve cover to see if there is a broken chain guard resting on top of the timing chain. If so, remove and discard it.

01-01-2002, 02:44 AM
Thanks T.Y.

I should mention that it is an S14, probably manufactured in late 94.

Also to add...the tapping is coming from the front of the valve cover...which is near the timing chain.


[ 01-01-2002: Message edited by: chris@speedalliance.com ]

01-01-2002, 03:20 AM
There are two upper timing chain guides, both of which can be removed...

I took both of mine off when I put on the DPR head, and have ran track events and logged lots of miles since then without any problems. Engine's a lot quieter, too!


01-01-2002, 03:36 AM
Hey Chris, Jared's car has the same problem, he was talking to some guy at the 240sx meet, and he also said it was the chain guides.

Anyways, I have a 1996 240sx, will I have this problem?

01-01-2002, 11:12 AM
okay so after searching the forums...i found that I need to remove the upper chain guide...i think. i'll go read old threads one more time.

i guess i'll go ahead and do it tomorrow.

One last question...
Weh doing this procedure...will I be messing with my timing at all. I don't think so. But I was reading FSM and it says thing like TDC and other tech terms.

I've always wondered...how do you find TDC?
I've had this question ever since I wanted to swap cams on my old toyota truck.

Also...will I need to drain my oil? I just changed it today...in hopes that the rattle would go away.


[ 01-01-2002: Message edited by: chris@speedalliance.com ]

01-01-2002, 11:24 AM
No timing change, no need to drain oil. Pull off your valve cover, you will see a guard in the front with 2 bolts holding it on. Remove it(even if it ain't broke) and put the cover back on....WALLA done.

01-01-2002, 11:55 AM
Old one should be there, be a rubber gasket, it is a OEM nissan item, however if you remove slowly it shouldn't damage, and can be reused if not in bad shape. I recommend if its damaged to get a new one from Nissan.

01-01-2002, 01:40 PM
Reseal the valve cover with a thin coat of Permatex as well. I have pulled valve covers a bunch of time and never had a problem reusing the factory gasket.