MITCH

need help will the gm performance parts valve covers will they work on a lt1 and a l98
any problems with useing these covers on either car 1995 or a 1987.
the 95 is stock and the 1987 has roller rocker on afr210 heads.
thanks for any help in advance
mitch
speednut2@aol.com
ps these are the chrome center bolts :steering: :steering: :seeya

bogus

I think all centerbolts are created equal.

call the vendor, to be 100% sure.

MITCH

these cover are gm performance covers and are bigger.any body out there have them installed.
HELP!!!!!!!!!!!!!!!!!!!!!!!!1
MITCH :banghead:

NavyVet

Mitch - I have GM #12497979 center bolt black ones on my '89. I think they're the same, just black instead of polished? Anyway, with the extra 1/4" height, they clear 1.6 Comp Cams stainless roller rockers fine. You need to slightly crimp in the sides of the baffle for the PCV breather line - otherwise a great fit and they look good too. I assume they'd be great on your LT1 too. Another option, although more expensive and heavier, is the LT4 valve covers. One thing with them is that they hold the gasket better for multiple reuses. Good luck. :flag

MITCH

was there any problems clearing any accessorys the lt1 looks tight by the alt bracket and the emssions pipe on the drivers side does not look to good.
did you install them your self. i think these covers will fit my 1987. i was going to buy them for a friend for a gift. but gm dealer told me they are not returnable. so i call gm tech line and they told me they are not sure if they will fit. i would think if you are sell them you should know what they fit.
i guessi am the stupid one here.
mitch :banghead:

FELNGR8

A 95 will have a couple fitment problems like I had on my 94. The valve covers are actually offset about 1/4" from symmetrical to the center bolts. What this means is the only way they fit on without interference is to put them on the opposite side of normal. Meaning the oil fill would go on the left hand side by the brake booster.

If you put them on the way they should go, then on the passenger side the cover will butt up tight against the EGR pipe where it goes around the back of the valve cover. Getting it to fit in there can be a bitch.

On the driver side the valve cover will butt into the bearing boss on the underside of the alternator. You will have to grind away on the alternator to make it fit.

When I get home I can send you a picture of mine to demonstrate what I mean in the above comments.

Also on the 94-96 the crankcase breather hose fits into the side of the valve cover, completely hidden under the fuel rail cover. I was able to get a rubber hose that is factory spec for the 92-93 ftom Jeff Kopp. That gave me a clean solution to this problem. I had to grind on my fuel rail cover to make a cutout like the 92 to fit over this hose.

Somewhere in the archives I posted my problems and solutions with pics.