5.7L Engine Replacement

[qystan]

I have a '89 5.7 Merc that came with the boat coupled to a Alpha 1 Gen 1. The oil takes on a bit of water, can't locate it.<br /><br />Question is will this engine fit and what do I have to do? (I do not have Chevy's 5.7's around here, so everything has to be right when I order)<br /><br />1987-95 Chevrolet, GMC C, K, G, R & U (L05)(5.7K)<br /><br />1. Do I have to change the cams?<br />2. Will the flywheel fit?<br /><br />Thanks in advance.<br /><br /><br />Qystan

 

[TilliamWe]

Re: 5.7L Engine Replacement

Originally posted by Qystan:<br /> I have a '89 5.7 Merc that came with the boat coupled to a Alpha 1 Gen 1. The oil takes on a bit of water, can't locate it.

You are sure it's not the exhaust manifolds??<br />If so, that vintage 5.7 should fit. I think your current flywheel will fit, both engines would have 1 piece rear main seals.<br />A cam change will almost certainly be necessary.

 

[Bondo]

Re: 5.7L Engine Replacement

IF you're ordering a New motor,....<br />I'm Guessing that "1987-95 Chevrolet, GMC C, K, G, R & U (L05)(5.7K)" is a replacement motor for a Truck,.........<br /><br />IF that's the case,....<br /><br />I wouldn't even bother to change the Cam,... <br />A Truck Cam is Sooo Close to a Marine Cam,... You'll Never Know, or Feel the Difference.......<br /><br />And,.. as Tilliam states,... The Flywheels Will be interchangeable between the 1s you have,... as the Crankshaft bolt pattern IS the Same....... <br /><br />But,... You Will want to change-out the Coreplugs to Brass,.... The new motors will Probably come with Steel Coreplugs......<br />

I have a '89 5.7 Merc that came with the boat coupled to a Alpha 1 Gen 1. The oil takes on a bit of water, can't locate it.

Have you tried Pressurizing the Cooling System with Air,.....<br />You'r Leak will become Quite Evident,.... Just follow the Hissing Sound to the Leak........<br />BTW,.... 10/15psi is Plenty......

 

[qystan]

Re: 5.7L Engine Replacement

Great info on the engine! I'll ask if its a truck engine to be sure. Thanks guys.<br /><br />Its not the manifolds, have removed the risers to look inside exhaust area - its dry, plugs are also dry.<br /><br />I'll try the pressure test, but its probably the block, just changed both heads a short while back. <br /><br />Will also try to re-seal the head bolts - just to be sure.<br /><br />Thanks again.

 

[Reel Poor]

Re: 5.7L Engine Replacement

If you google "chevy L05" there is a lot of info that will come up.