UIM and LIM replaced now leaking coolant out of UIM gasket
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UIM and LIM replaced now leaking coolant out of UIM gasket
So I had a mechanic replace my LIM gasket with the GM one and the upper with a FelPro now it appears that coolant is leaking externally out of the Intake plenum right by the thermostat housing. Mechanic says there is no way this should be happening. BTW this is 2000 bonneville SE. I know the coolant is leaking because the gasket is wet and I wiped the coolant down and now I'm running the engine and more is seeping out help!
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I'm going to take it back to him tomorrow, but my question is, what could be causing coolant to leak externally from the upper intake right by the thermostat housing. We replaced the upper and lower intake gasket, coolant elbow, he used sealant on the lowers. It was not leaking coolant in the upper before the job
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yes because the UIM gasket is wet where it meets the intake surface and I can see coolant seeping out from between the gasket and the intake. It'* a very small amount but it'* still there.
#6
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If thats the case...
Either the Plenum surface is not truly Flat, The Upper is possibly warped... The lower gasket is either bad out of the box... Or the TB gasket is leaking....
Hard to say without looking at it
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Either the Plenum surface is not truly Flat, The Upper is possibly warped... The lower gasket is either bad out of the box... Or the TB gasket is leaking....
Hard to say without looking at it
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Thanks, I'm hoping the surface isn't warped. Is it possible that just the Fel Pro UIM gasket is faulty? I paid 63 bucks for the GM lower gasket I should hope ot isn't bad right out of the box.
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Is it possible that the new UIM gasket is faulty. Can it just leak externally on it'* own? Or does the LIM gasket have to be blown for the upper to leak?
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Originally Posted by Paul1981
Is it possible that the new UIM gasket is faulty. Can it just leak externally on it'* own? Or does the LIM gasket have to be blown for the upper to leak?