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I know the lower intake manifold gaskets are known to go bad on those engines.
If it was over heated bad enough then yes the heads would have to come off too.ya it overheat bad that one time it still overheats but not as bad but this could be cuase i have been watching it close so it could be i stop it before it gets that bad
ya if i have to replace intake might as well replaced head gaskets dont you think? but eaither way it dont look like a fun job to do! lol
Quoted From sclark:
ya it overheat bad that one time it still overheats but not as bad but this could be cuase i have been watching it close so it could be i stop it before it gets that bad
ya if i have to replace intake might as well replaced head gaskets dont you think? but eaither way it dont look like a fun job to do! lol
That’s what I would do in a case where it has been over heated real bad.
Just do the head gaskets and the intake at the same time so that you would certin that it’s fixed.but wouldn’t the block test show up as a bad head gasket . if the intake gasket was bad and that would cause the head gasket to go bad?
i am just wondering why the block test didn’t show a bad head gasket?
If the block test doesn’t show a combustion leak I would look elsewhere for the cause of the problem. Anytime you have a leak you will get air in the system and anytime you have air in the system it often overheats so look for the leak first. I cover the basics of overheat diagnosis in this video that might help you.
http://www.youtube.com/watch?v=hUzOTnsWImIyes i did see that video
i guess i am trying to find the “leak” i don’t seem to be loosing coolant just that one time when it really overheated
so at this point i am not sure how to find/ check like the intake gasket to confirm this?
Quoted From sclark:
yes i did see that video
i guess i am trying to find the “leak” i don’t seem to be loosing coolant just that one time when it really overheated
so at this point i am not sure how to find/ check like the intake gasket to confirm this?
The first thing Eric does in that video is pressure test the cooling system. That’s how you find if you have a leak or not.
ya well i dont have a pressure tester i will call around to see how much one cost and get one in the mean time i would assume if i pressure test it and it slowly loose pressure some thing in side the engine? if i dont see a visable leak?
thanks
yes i did find a place that i can do that with
my question is if it seems to hold pressure and i don’t see any leaks then what is the next step? if i have a bad intake gasket will it not hold pressure or for that matter a headgasket?
thanks
i pressure test it and it holds fine. then one thing i notice is that when the fans turn on its in low speed. shouldnt the fans turn on low speed first then high speed? i tested the fans low and high speed and the relays they all work fine
what i mean is the temp gauge read at the half way point then 2 marks pass that the fans turn on but its low speed shouldn’t the fan be in high speed by then? and then BEFORE the half way mark the fans should be in low speed?
thanks
The fans should just be on or off, they don’t vary the speed (that I know of). I would watch over that video again. Also make double sure you have the coolant system bled properly. The spill free funnel costs about $20, and is beyond worth the money. I don’t see it posted, so here’s the coolant bleed procedure video. Don’t worry that you don’t have a bleeder valve, you don’t need it. It’s just to help when filling the system.
http://www.youtube.com/watch?v=zUpXgAJ1gjU
Good luck.
yes i think i got the air out of the system as for 2 speeds my van seems to have it? unless its a function it don’t uses? my van also has the bleeder valves to
as for the pressure test hold long should it hold pressure? and yes i did the pressure thats on the rad cap to
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