Question about 2000 Oldsmobile Bravada

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Its raining coolant down the back of the engine.it doesn't seem to be the block plug.its coming from above that.the hoses seem to be fine.have been suffering poor heater performance in the cabin and you can smell the cooking coolant.( kinda swampy smell).could there be something other than a manifold gasket blown out. theres no water in the oil.and is this one of those 7hr jobs to change a $20 part? could the home mechanic accomplish this task?

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Sounds like you know the problem...the lines leading from block to heater core, possibly the core itself (smell in compartment). Try to visually find the leak point before jumping in. Check the mechanically or electrically operated heater valve on line into core if so equiped, I have seen these go bad on many diffferent vehicles...

Posted on Oct 01, 2010

Testimonial: "thank you for the addvice. it definately helped which direction i was heading. hopefully you will be kind enough to check the update on my problem.."

  • fourbrysons Oct 07, 2010

    my vehicle has the auto climate control system and the problem seems to be intermittent. one drive its blasts nothing but heat..say drive home after work and nothing but cold..next day oposite. tthe raining under the car seems to be the system boiling over. how would you test the computer part of the system to see if its the primary cause?

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Why would I see coolant leaking from a motor mount bolt


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With the engine off, get under the vehicle with a strong light and check the area above the motor mount closely. If the coolant has been leaking for a while, you should see a nice clean path where it has been running down, possibly with whitish lines along the edge. Trace it back to where it comes from, and you will know what has to be repaired to stop it.

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Thank you for using fixy and be safe.

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