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Old 02-15-2011, 11:09 AM
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5.7 Tbi

My son has a P30 CHevy with a 5.7 TBI engine, which blew a piston and damaged the cylinder wall. He is having a problem finding a good replacement used engine. Question: Can a older 5.7 carb engine block be used to replace this and have his heads rebuilt?

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Old 02-15-2011, 12:25 PM
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Hi,

It would have to be fairly close in vintage to support ECU, etc. Obviously, non-Vortec head type.

If it is just "the block" and not cam, crank, etc. then you should be OK. Check front of engine for accessory mount points that have changed from 75 - 95.

Good luck,

Matt
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Old 02-16-2011, 06:01 AM
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87 5.7 Tbi

MAtt;

Could I take the crank and cam from my TBI engine and install into this older carb block, with using the heads and intake from the TBI engine?
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Old 02-16-2011, 07:30 AM
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Hi,

Yes, if it is the same vintage. A few things...
1. Need to find a block of same vintage with a single, not two piece rear main.
2. Mic the crank of the old engine and new engine on main bearing journals and rod journals to validate proper fit.
3. I would find a suitable, "new" replacement cam since reusing an old cam can be problematic and a flat cam is a real pain to replace.
4. Make sure the "old" block cooling passages and the "existing" block cooling passages are the same. (Match gaskets, etc.)
5. Transfer over the intake, but check for warpage.
6. Validate exhaust manifold bolt patterns are the same (should be)
7. Use a high quality "full" gasket set like Victor-Renz with the full sump gasket and full intake gasket sets to void obnoxious leaks (of fluids and vac.)

Cheers,

Matt
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