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why does my 383 suck? >> now a crack??

80' 427 said:
You are welcome. What kind of oil leak?
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not sure exactly, but its a big one. leaking a lot down the back side of the engine. I don't think it's the oil pressure sending unit, or the rear main but I can't see back there to be sure. I'm planning on yanking it out and taking a look.
 
ashman said:
not sure exactly, but its a big one. leaking a lot down the back side of the engine. I don't think it's the oil pressure sending unit, or the rear main but I can't see back there to be sure. I'm planning on yanking it out and taking a look.
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Could be the seal around the distributor...
 
Or the rear seal on the intake. I've seen them just barely be hanging on and finally pop out. Both Julie's Suburban and my K2500 have leaks there. I need to get new gaskets on them but have not had the time yet.
 
TerryD said:
Or the rear seal on the intake. I've seen them just barely be hanging on and finally pop out. Both Julie's Suburban and my K2500 have leaks there. I need to get new gaskets on them but have not had the time yet.
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Goop that with RTV them gaskets are ****e
 
TerryD said:
Or the rear seal on the intake. I've seen them just barely be hanging on and finally pop out. Both Julie's Suburban and my K2500 have leaks there. I need to get new gaskets on them but have not had the time yet.
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Thats a possibility.

As far as lots of work to pull it goes, I built myself a nice shop crane, so hopefully it won't be too bad. Plus, I want to inspect my clutch and flywheel.
 
I'd bet if you put on some nice mid length headers and a dual exhaust you'd be happier with your engine...those center dump manifolds are pretty restrictive...


being a 383 and all :waytogo::whistle:
 
62 fat guy said:
I'd bet if you put on some nice mid length headers and a dual exhaust you'd be happier with your engine...those center dump manifolds are pretty restrictive...


being a 383 and all :waytogo::whistle:
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If I end up putting any real money into this engine that will be on the list.

Of course I just found a guy local that is willing to set me up with a 6.0 for $2500 including all accessories, modified wiring harness and programing. He even offered to come help me troubleshoot if I ran into any issues.

So I might go that route, but I want to get this engine into good working condition first either way so that I can sell it for a decent price.
 
took the engine apart and got a look at the top of the pistons. Looks like I have these:
http://www.northernautoparts.com/ProductModelDetail.cfm?ProductModelId=10719

Piston1.jpg

with my 76cc heads that means a compression ratio of 9.10. That isn't high enough to need higher octane gas, is it?
 
A bit worried I have bigger issues.

Engine_leak1.jpg

looks like I was leaking coolant under the intake manifold. Also found a crack. Right behind the left-most push rod. :doah:

close up:
Engine_leak2.jpg


How bad is this?
 
It looks like the leak that is coming from the top was coming from an intake bolt, presumably not tightened enough.

Still investigating the crack...
 
after thorough cleaning, it is definitely a crack. :(
Crack1.jpg


I was able to see inside the water jacket to the other side of the crack and it is certainly there. The question is, what to do about it. It's so small that at most angles it looks like it isn't there but I would like to do something to ensure that water isn't seaming through.

Think I could do something simple like JB weld or something? :dunno:
 
I certainly would not want JB Weld breaking loose inside my motor. There is also a good chance the crack will run (think windshield cracks). May be time for a new block.
 
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