chevy 468ci gone bad. get it rebuilt or buy a crate engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pwrunt3pte · 07-25-2010, 05:11 PM

compression test confirmed my fears. cylinders 1,2,3,4,6,8 about 178-182 psi. cylinder #5 130psi. cylinder #7 90psi. I noticed a haze of oil or like a gas residue in the coolant the other day. any one know of a good engine builder?

justplainray · 07-25-2010, 07:33 PM

first you have cooling system problems, now you have low compression in two adjacent cylinders.
You have a blown head gasket.
That is not too hard to fix, pull the left head, sand the block, plane the head, reassembly with Fel-pros best gasket.
That's exactly what I have been doing today on my small block 400.
good luck,
justplainray

**mr48chev** · 07-25-2010, 08:10 PM

I'm with Justplainray in that I would get that head off and see what went wrong. Most likely as he said, a blown head gasket.

Have the head checked out and surfaced and it should be fine when it goes back together.

I would probably want to pull both heads and put a set of matching head gaskets back on it when I put it back together.

justplainray · 07-27-2010, 09:55 AM

after sweating and swearing one head off on Sunday.
I'm pulling both heads, do it once, do it right.
damn it was hot this past weekend.
but this week's much cooler.

justplainray

07-25-2010, 05:11 PM	#1
pwrunt3pte Registered User Join Date: Jul 2010 Location: jacksonville, florida Posts: 21	chevy 468ci gone bad. get it rebuilt or buy a crate engine compression test confirmed my fears. cylinders 1,2,3,4,6,8 about 178-182 psi. cylinder #5 130psi. cylinder #7 90psi. I noticed a haze of oil or like a gas residue in the coolant the other day. any one know of a good engine builder?

07-25-2010, 07:33 PM	#2
justplainray Registered User Join Date: Apr 2009 Location: Ansonia, CT Posts: 91	Re: chevy 468ci gone bad. get it rebuilt or buy a crate engine first you have cooling system problems, now you have low compression in two adjacent cylinders. You have a blown head gasket. That is not too hard to fix, pull the left head, sand the block, plane the head, reassembly with Fel-pros best gasket. That's exactly what I have been doing today on my small block 400. good luck, justplainray

07-25-2010, 08:10 PM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,650	Re: chevy 468ci gone bad. get it rebuilt or buy a crate engine I'm with Justplainray in that I would get that head off and see what went wrong. Most likely as he said, a blown head gasket. Have the head checked out and surfaced and it should be fine when it goes back together. I would probably want to pull both heads and put a set of matching head gaskets back on it when I put it back together. Last edited by mr48chev; 07-25-2010 at 08:18 PM.

07-27-2010, 09:55 AM	#4
justplainray Registered User Join Date: Apr 2009 Location: Ansonia, CT Posts: 91	right, like Mr48 said.. after sweating and swearing one head off on Sunday. I'm pulling both heads, do it once, do it right. damn it was hot this past weekend. but this week's much cooler. justplainray



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