Mustardy goo in the valves.

Asked by Feb 21, 2015 at 11:11 PM about the 2004 Pontiac Grand Am GT

Question type: Maintenance & Repair

We have a 04 grand am gt and recently discovered we didn't have any
heat, the car would only sometimes overheat but would cool down
quickly. We would have heat for a minute than it would be cold again. We
took the oil cap off and noticed a Mustardy thick goo on the cap so we
decided to look at the valves, after removing the cap, we found a
yellowish/brownish thick goo everywhere in the valves and injectors.
Could this be a serious problem?
Thank you.

11 Answers

Probably bad head gasket leaking coolant into the oil.

That's what I was afraid of, my concern is we just had the head gasket replaced 3 years ago because the car overheated and wouldn't start. We took it to a mechanic who said the gasket blew, could this really happen again only 3 years later? The car only has 88,000 miles on it as well.

83,165

Yep that is what it looks like when they go bad, do you also have an oily substance in the coolant?

No oily substance in the coolant, we had the coolant tank replaced about 2 weeks ago as well. The car still ran fine until We started tearing it apart as well.

83,165

Good at least you won't have to flush the cooling system as well. Pull the heads off, look for cracks between the valves if none are found then have them pressure tested and resurfaced if good, while the top end is off clean out as much of the crud that is in the valley as you can and clean all mating surfaces, check the intake manifold closely those have also been known to leak, replace if required, then put it it back together following the reassembly procedures and torque specs. Good Luck.

545

If you are using Dexcool, you might want to change to a different antifreeze after this repair job

All the dexcool was removed when the last head gasket job was done. What is the best method for cleaning all this gunk off the head as well as the injectors?

So far we have removed the front head, (we've been fighting with the back one due to the exhaust) I don't see any cracks, holes etc...in the gasket so we will have to look further in to the head after we see the back one. I did notice inside the 3 cylinders themselves on the head there is corrosion and what appears to be rust, is there a safe way to clean this or will we need to take them in to get it resurfaced?

During some overheat situations, the block and/or heads can get so deformed, that they have to be replaced...

Thank you all for the comments so far it's all been very helpfull. Would bad gaskets/head also have something to do with the lack of heat?

83,165

Yes simply due to the compression gasses heading to the highest point and making a pocket, and a heater core is one of the higher points or is the first outlet from the block.

Your Answer

Add photo

Related Questions

  • '99 Grand Am P1404 code/EGR valve 2 answers

    Hello, I have a 99 Grand Am with 3.4L v6. I am having trouble with a P1404 (EGR closed performance) code that keeps setting the check engine light. I have replaced the valve 3 or 4 times over the ...

    1999 Pontiac Grand Am 2 Dr GT Coupe

    -

    Maintenance & Repair

  • 2000 grand am 2.4 valve cover torque specs 1 answer

    I'm replacing the valve cover gaskets on my 2000 grand am 2.4l dohc and I can't find the torque specs anywhere. All I find is the head bolt specs. Would you happen to know??

    2000 Pontiac Grand Am SE Coupe

    -

    Maintenance & Repair

  • how do i take the valve cover off 2 answers

    i have all the bolts out and the side where the timing chain is will not come loose

    Pontiac Grand Am

    -

    Maintenance & Repair

  • Will the Pcv valve make my Car idle rough 2 answers

    I have a 2003 Pontiac Grand Am 3.4 liter v6 engine and the car is idling below 1000 rpms, think white smoke coming out the back kg the car, no power in drive idles fine in park, and stalling out wh...

    2003 Pontiac Grand Am GT

    -

    Maintenance & Repair

  • PVC valve 4 answers

    where is the pvc valve located THanks Don

    Pontiac Pursuit

    -

    Maintenance & Repair

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,628 nationwide Grand Am listings starting at $1,000.

ZIP:

Search Pontiac Grand Am Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,320
#2 John Saffrahn
John Saffrahn
Reputation 1,510
#3 Tom Demyan
Tom Demyan
Reputation 1,320
View All

Related Models For Sale

Used Pontiac Grand Prix
23 Great Deals out of 3,699 listings starting at $800
Used Pontiac G6
69 Great Deals out of 5,048 listings starting at $1,500
Used Chevrolet Impala
892 Great Deals out of 35,195 listings starting at $1,700
Used Ford Mustang
548 Great Deals out of 42,541 listings starting at $1,699
Used Pontiac GTO
5 Great Deals out of 482 listings starting at $5,500
Used Chevrolet Malibu
1,119 Great Deals out of 82,064 listings starting at $1,800
Used Honda Accord
990 Great Deals out of 74,852 listings starting at $899
Used Pontiac Bonneville
8 Great Deals out of 654 listings starting at $1,375
Used Toyota Camry
1,188 Great Deals out of 95,099 listings starting at $1,250
Used Chevrolet Cavalier
1,302 listings
Used Ford Taurus
304 Great Deals out of 21,177 listings starting at $1,500