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Discussion in 'The Garage' started by chevyjeff, Jul 6, 2004.
does anyone know what the 5.7 motors in 90 blazers were from the factory. 2 or 4 bolt mains.
Should be 4 bolt main if it's original.
My 90 Jimmy had a 2 bolt in it.
4 bolt main.
My 89 blazer still has the factory engine with 218,000 on it and when i dropped the pan it was a 2 bolt.
My 1987 350 had 2-bolt mains
my 90 blazer that i bought new had a 2 bolt mains.
<font color="red"> well, lets see, original motor had 2bolt mains (sum reason dunno why) new motor (well, rebuild of another block) is 4-bolt mains. seems GM had a hard time figuring out which blocks went where...usually, the heavy duty burbans got the 4-bolt mains...dun see too many blazers wit 4bolts. /forums/images/graemlins/yikes.gif </font>
Well mine was a 4 bolt main when rebuilt to a 383.
Haha sounds like its luck of the draw... /forums/images/graemlins/tongue.gif /forums/images/graemlins/screwy.gif /forums/images/graemlins/screwy.gif /forums/images/graemlins/screwy.gif /forums/images/graemlins/screwy.gif
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Haha sounds like its luck of the draw...
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Sounds like the trucks got whatever happened to be handy when being built. Craziness...
Every truck sbc I've seen apart was 4 bolt mains, including the 350 from my Jimmy. As I understood it only passenger cars got the 2 bolt mains unless it was a high performance application. I guess the reality is that it was a crap shoot, and most customers would never find out one way or the other anyways... /forums/images/graemlins/whistling.gif
GM is/was a weird company.
As far as I know Blazers that came from the factory with a towing package got the 4 blt mains. Which to Me makes since.
Prolly just the K5's built on Tuesdays and Thursdays...unless it was beige and had power windows, then it got 2 bolt mains.
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