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What are the engine differences between 3g's and 4g's?
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Author:  89Mirageman [ Wed Jul 12, 2006 9:08 pm ]
Post subject:  What are the engine differences between 3g's and 4g's?
There is a local 4 door sedan here for sale with a blown engine (ran low on oil) and I am thinking about picking it up. Not sure exactly which model but I know it's between a 93 and 96. From what I've seen on the net the engine looks exactly like the 4G15 in our 3g C/S/M's. Anyone know if it's compatible? I still have a perfectly good 8v 4G15 from my 89 Colt and I could throw it in for a nice, cheap daily driver. Will the newer 12v head swap over to my block? The guy has misplaced the key so I couldn't take a look at the engine because he locked the doors.
Author:  The Ethereal [ Sat Jul 15, 2006 7:29 am ]
Post subject: 
3G engines will bolt in 4G cars. 4G engines won't bolt in 3G cars, because of differences in tranny and engine mount design. Bolting the 4G engine and tranny in a 3G is straight forward and will work.
So to answer your questions, the good ole 8 valver will bolt straight in using all the 4G sensors and stuff and ghetto fabbing the 8V dizzy to work w/ the 12V dizzy setup.
You won't have to do that if you bolt the 4G 12V head on the block. I just don't know, what head gasket to get. :-? People have converted 8V engines to 12V by just bolting on the 12V head.
Author:  89Mirageman [ Sat Jul 15, 2006 9:20 am ]
Post subject: 
Quote:
3G engines will bolt in 4G cars. 4G engines won't bolt in 3G cars, because of differences in tranny and engine mount design. Bolting the 4G engine and tranny in a 3G is straight forward and will work.
So to answer your questions, the good ole 8 valver will bolt straight in using all the 4G sensors and stuff and ghetto fabbing the 8V dizzy to work w/ the 12V dizzy setup.
You won't have to do that if you bolt the 4G 12V head on the block. I just don't know, what head gasket to get. :-? People have converted 8V engines to 12V by just bolting on the 12V head.
Yeah I was planning to swap over the 12v head onto my 8v engine if it was possible. I think I may pick this car up, it's only $200 and has a little body damage but I can fix that myself.

Looks like I can have a reliable daily driver pretty cheap and if I get bored with it I can always do an EVO III swap in the future. :twisted:
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