could this be a rebuilt engine?
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Junior Member
Joined: Mar 2011
Posts: 70
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From: Marathon, Ontario Canada
Car: 1984 Cadillac Brougham
Engine: 1989 Iroc Z 350
Transmission: 700R4
could this be a rebuilt engine?
Just wondering if gm ever used white sealant on their head bolts? This motor I got is supposed to be high mileage but there is barely a ridge in the cylinders and the cross hatch is still very visible.
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Joined: Jul 2005
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Re: could this be a rebuilt engine?
Was it efi? They do not tend to taper bad like carbed engines due to.a better warm up cycle. Seems like 305s dont do it near as bad as 350s either based on what i have seen, but that is ancedotal.
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From: Bright, IN
Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: could this be a rebuilt engine?
I've seen the white sealant on new GM replacement head bolts.
My 248k mile L31 engine from my pickup still has visible crosshatch and no ring ridge. As Drac0 said, EFI controls the fuel much better and doesn't wash the cylinders walls during warmup.
My 248k mile L31 engine from my pickup still has visible crosshatch and no ring ridge. As Drac0 said, EFI controls the fuel much better and doesn't wash the cylinders walls during warmup.
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