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Probable blown headgasket, 1992 3.1 MPFI


Crazy K

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the engine is assumed to be an un-rebuilt motor with an actual 225,000 miles on the clock.

 

The motor still works great... but appears to have a blown coolant jacket on the rear headgasket. This is not confirmed yet as to be the source of the leak...... but I did overheat it. :willynilly:

 

 

WHAT SHOULD I DO?

 

new headgaskets... and let it go?

 

use a steel head headgasket, which is thinner? (unconfirmed, I read this in a post by brian P)

 

stick in 94-95 fulcrum rockers to bump up the rocker ratio from 1.5 to 1.6?

 

stick in LS6 or some such valve springs?

 

Cover it in gasoline, throw a match on it and let it burn?

 

or any combination of the above?

 

 

seriously, it can;t be that far gone, can it?

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Use felpro gaskets. The rockers will have to be 96+ for fulcrum roller rockers and you CANNOT use those as your MPFI heads do not have provisions for them. You will have to go with 94-95 1.6 rockers. They are not fulcrum, they are ball rockers.

 

Why the hell would you put in LS6 springs on a stock cam? Theres no need and your wasting your money.

 

Fix it, use 94-95 rockers or buy my 3100 heads and intakes ( which have the fulcrum roller rockers) ;)

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i'd personally pull off anything that I would like to keep then send the pos to the yard

I have a complete parts car for it... but with a 4.5 engine so that won't fly. It is getting fixed, eventually.

 

 

It came to mind.... that I have the 91 vert's 3.1 which is going to go into deep storage once I pick up the tgp motor that will sub for it. I could pull that in five minutes... after all it has no tranny attached. I could do a tear down and inspection... regasket it and speed swap it in a day a few weeks from now.

 

or I could regasket the motor in car and see if it flies.

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you could go with iron head 3.1L head gaskets, they are 0.020" thinner, so it'll bump compression just a hair.

Thats What I read!!! :thumb: I phone tagged brian, as I think he did it... I'm wondering if I should bump up the compression or not...

 

I need to figure out what mod to do vs not do etc etc

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Cover it in gasoline, throw a match on it and let it burn?

 

 

Yeah, haven't you heard of w-body barbecue? mmmmm, tasty!!!! :lol:

lol. that would be more screwed up than the trashed grand prix last year

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I have some mild ported 3.1 heads, milled, with 3angle valve job that I would let go for $400 (+shipping) Use them with the iron head gaskets and it will give that 3.1 a nice kick! If your looking for more than just a nice kick then send me a PM!

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I have some mild ported 3.1 heads, milled, with 3angle valve job that I would let go for $400 (+shipping) Use them with the iron head gaskets and it will give that 3.1 a nice kick! If your looking for more than just a nice kick then send me a PM!

nice offer, but I'm too cheap. sorry!

 

A GM product will run poorly long after most other cars would have stopped running altogether.

now... this makes me laugh!!!!

 

pensive.... I need to dig in and see what I find.

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If it were me, the 225k engine would be fully rebuilt. I couldn't justify doing head gaskets and nothing else with that mileage + the few cases of overheating, I think you'd be taking a risk. If I were selling the car, that's one thing :lol: but if it's mine, I'd freshen it up.

 

Or just put in a Crane H-260, 1.6 rockers, LS6 springs (here you'd need em) and see how long the bottom end lasts (I'd have to have a lot of spare time for that one)

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I still would like to talk to you on the phone Brian. I am not worried... I will have enough bottom ends lying around in case one spins a bearing or something. I will have the 91 verts and the 91 sedans in the garage.

 

 

and yes... I think I will sell the car once it is restored. clean title.... clean the car... and let it go.

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I usually don't have any alone time at work except about a half hr after lunch. Are you available at like 1:30 tomorrow?

 

Prepare at least 4 hours for Ken...:lol:

 

I've been too busy and/or too exhausted to call him...:(

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