Cracked 5.7 block at Starter Bolts

stutaeng · Jul 25, 2021

I was going to suggest going ahead and bolting the starter...and cranking it to see if the fix will hold.

But OP is probably already ridding down the road by now

mattyg · Jul 25, 2021

stutaeng said:
I was going to suggest going ahead and bolting the starter...and cranking it to see if the fix will hold.

But OP is probably already ridding down the road by now

Motor is back in, I could have repaired the crack in frame but it needed a new flex plate. Both the old starter and flexplate are chewed up. I went at it pretty hard today, didn’t take many pictures. I’ll have it buttoned up tomorrow, still waiting on a new starter and I need exhaust manifold gaskets, might put on a new water pump since it’s apart. And I killed a knock sensor. LOL.

mattyg · Jul 25, 2021

man-a-fre said:
Nice job! alot of work, See you kept from breaking exhaust studs by removing manifolds, smart man.

The collector bolts were seized, my Milwaukee mid torque didn’t even budge them, so the manifolds came off..

mattyg · Jul 25, 2021

drewcrew said:
Are you going to weld it there hanging on the chain ?

Yes sir, there was no reason not to.

letitsnow · Jul 25, 2021

It is refreshing to see a new (forum) member that dives into stuff like this. Some of the new people seem to buy a 20+ year old truck, then spazz out when it needs work.

mattyg · Jul 26, 2021

letitsnow said:
It is refreshing to see a new (forum) member that dives into stuff like this. Some of the new people seem to buy a 20+ year old truck, then spazz out when it needs work.

LOL, I spazzed, then got to work.

Schurkey · Jul 26, 2021

Check the manifolds with a straightedge; if the manifolds are flat--and the gasket surfaces of the heads are flat--put it together without exhaust manifold gaskets.

mattyg · Jul 26, 2021

Schurkey said:
Check the manifolds with a straightedge; if the manifolds are flat--and the gasket surfaces of the heads are flat--put it together without exhaust manifold gaskets.

Is that how they come from the factory? Motor had gaskets when disassembled..

Schurkey · Jul 26, 2021

It was traditional for Chevy, Olds, Buick, Cadillac to have no gasket between the cast-iron exhaust manifold and the cast-iron head surface.

Pontiac used gaskets. Go figure.

My '88 C/K service manual makes zero mention of exhaust manifold gaskets for Small-Blocks.

It does say to install the flat washers against the manifold, then the tab washers. Torque the center two bolts to 26 ft/lbs, and the outside bolts to 20 ft/lbs.

Non-cast iron parts will probably need gaskets.
Exhaust manifolds run hotter when there's a gasket between the air-cooled manifold, and the water-cooled head. With no gasket, heat can transfer from manifold to head better.

DamHoodlum · Jul 26, 2021

Schurkey said:
It was traditional for Chevy, Olds, Buick, Cadillac to have no gasket between the cast-iron exhaust manifold and the cast-iron head surface.

Pontiac used gaskets. Go figure.

My '88 C/K service manual makes zero mention of exhaust manifold gaskets for Small-Blocks.

It does say to install the flat washers against the manifold, then the tab washers. Torque the center two bolts to 26 ft/lbs, and the outside bolts to 20 ft/lbs.

Non-cast iron parts will probably need gaskets.
Exhaust manifolds run hotter when there's a gasket between the air-cooled manifold, and the water-cooled head. With no gasket, heat can transfer from manifold to head better.

Guarantee if you don't use gaskets it will leak & sound like fido's ass

Cracked 5.7 block at Starter Bolts

stutaeng

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mattyg

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letitsnow

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mattyg

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Schurkey

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DamHoodlum

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