V-6 GA LIM Failures

Dasfinc

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Picking up a 99 GA SE with the 3.4 soon for the new DD so I can finally go back to school :roflpicard:

Thing has only 64K on it (Grandma owned kinda thing), signs of failure? Where do you buy the 'right' kind of replacement gaskets? and what kind of trans problems do these things have?

I know its hard to replace, I know it takes time, I've done HG's on these motors before, but never had one fail ON me, just looking for some piece of mind.
 

ilikemtb999

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i'd say straight from GM. i know they had updated gaskets for the 3800 but not sure on the 3400
 

Fish

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Maybe see if the 3500 gaskets are updated and can be used.
 

Oreif

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You can get the Fel-Pro head gaskets from Auto Zone. They are very good, But you will need to get the intake from the dealership. The 3400 engines had a problem with intake gaskets and only GM has the correct replacements to prevent them from leaking.
 

Smoke

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Picking up a 99 GA SE with the 3.4 soon for the new DD so I can finally go back to school :roflpicard:

Thing has only 64K on it (Grandma owned kinda thing), signs of failure? Where do you buy the 'right' kind of replacement gaskets? and what kind of trans problems do these things have?

I know its hard to replace, I know it takes time, I've done HG's on these motors before, but never had one fail ON me, just looking for some piece of mind.
Fel-Pro gaskets all the way. No one I know with them has had to do a second LIM change,to compare some people who had GM LIM gaskets installed under warranty have had to replace them again.

Every '99 3400 GA with the original gaskets will fail them eventually.Its a matter of time, some have gone all the way to 150K on the OEMS, some have had em go at 50,000 miles.Your symptoms will be orange dex-cool pooling around and under the throttle body, coupled with dissapearing coolant .If the low coolant idiot light comes on,plan to replace them soon.

If/when this happens, check to make sure the oil isnt milkshaked, and get it changed ASAP.

Good luck.:bigthumb:
 

ThePizzaGXP

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We use felpro at work. Of 10 or so 3100s/3400s our salespeople drive, all of them have been replaced at or close to 100k miles, and most of them are approaching 200k miles.

Most of the trannies at work dump out around 150-180k. They have alot of highway miles, but who knows, maybe you'll have the same luck.:dunno:
 

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