knocking noise from sr20det

[Narciso]

Hi Narc. Kudos for your thorough investigation!

The additional cam lift of your 260's shouldn't make the head any louder. The rockers should ride on the lobes the same way they do on the stock cams. They should with heavier valve springs, anyway... but if stock springs were re-used then any unusual sound you'd hear from running higher lift cams would come from valve float causing a valve to get munched and/or rocker to become dislodged. That's obviously not your case, though.

This actually seems to be the case but the rockers were prevented from dislodging by the RAS. It makes sense since there are different width scratches due to uneven height in the guides and shims. The only lobe that was shiny like a mirror was the last one on the exhaust side. All the others were scratched in different patterns. Thanks for the insight

I will let everyone know if the noise problem is solved when my cams come in. Hopefully people will read this thread and go run the tests and inspect everything that we did.

[blackmagic]

yeah i ordered another motor for 1000 shipped with everything but transmission ecu and wiring. so when i put that motor in my car im tearing into the old one and im going to fix that damn thing and mabe buy a s13 for fun!! haha i love 240's! and thanks to everyone who tried to help its appreciated very much. we have a hell of a group! I hope everyone searches and finds this and it helps others.

[cartoonlips7]

alright here is my problem.. just stole a car off a guy.. s13 he says he thinks a rod is knocking. maybe spun bearing.. i towed car home so have not started it.. should i start it maybe he is wrong.. oil looks fine,, he said he had it compression checked and checked out at 139 across the board.. i trust very little people.. so should i start it see if he was full of sh*t.. maybe something else wrong.. or just tear down the oil pan check for debris and check bearings? THANK YOU FOR YOUR HELP