Question about 1999 Buick Regal

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Changed engine gaskets and upper intake manifold after antifreeze mixed with the oil and plastic manifold was no good. now I fill te radiator after repair and water goes right to the crankcase and oil pan.

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  • garystephanf
    garystephanf Apr 18, 2014

    i had the heads checked, they were straight, I cleaned them, new gaskets torqued to spec, I had to raise the engine to change oil pan gasket, removed . there was a plunger and spring assembly by where the oil filter goes, thats what im thinking. water was oly in pan

  • garystephanf
    garystephanf Apr 18, 2014

    water was in the oil pan, it filled up quite easy from just water pressure from the garden hose

  • garystephanf
    garystephanf Apr 24, 2014

    I also did a real bonehead move, when I took the heads off. I didnt losen or remove any of the push rods rocker arms or valve springs, just lifted it out and back in, that might be the reason for when I went to fill the radiator, it went to the oil pan, probably wasnt a good seal?



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  • 354 Answers

Some where you have lost integrity of the cooling system allowing it to enter the crankcase. If the coolant goes directly into the oil, the problem should be obvious. If you send the year, make and model I may be able to help you locate it. If it overheated, the cylinder head may have cracked.

Posted on Apr 17, 2014

Testimonial: "1999 buick regal LS"

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  • Vincent Competello
    Vincent Competello Apr 17, 2014

    If you did this work yourself, you noticed there are gaskets and seals throughout the job. You mentioned the intake was bad so I'm assuming it was damaged from extreme engine temperature. If this is true, you have also damaged the cylinder heads and/or their gaskets. The job definitely has to come apart again even if just to check your work but, I would assume that if the manifold melted, the upper part of the engine such as the heads and gaskets I mentioned before may also have an issue.

  • garystephanf
    garystephanf Apr 17, 2014


  • Vincent Competello
    Vincent Competello Apr 18, 2014

    You found a small metal cup-shaped item about 6mm in diameter in the oil pan with a spring about 120mm long?



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Posted on Jan 02, 2017

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SOURCE: Oil on top of lower intake manifold

Its a common problem, but it has to be adressed before your engine is done. That oil is comming out wear the distributor wonce was. The plentem, or what you call upper intake will have to come back off, in order to get the plug out to chg. the rubber O- ring on the plugWhen you get it out it will look like half a distributor with the gear on the end and the O- ring towards the top. Its located right under the throuttle on left side of engine where the trans and block meat. There might be enought room to get it out without pulling the intake i'am not sure. But thats where the oil is comming from manny an engine has tied up because of that leak.

Posted on Feb 08, 2009

  • 82 Answers

SOURCE: 1995 3.8 oil leak at oil filter area still leaks

have you checked the pcv valve and hose to see if motor vacuum is venting the pressure if not press. will build - could be causing your gasket leak problem?

Posted on Sep 28, 2009

  • 32 Answers

SOURCE: Hose from water pump to intake manifold above and behind water pu

this is a water pump bypass hose connector to the manifold, take the broken piece to a parts store and show it to them, it should have the threads still broken off in the manifold so explain that. To remove the broken piece ask for a EZ OUT to fit the piece you took to the store.
It is common for these to become brittle and break off but it is a simple fix.

Posted on Feb 21, 2009

  • 158 Answers

SOURCE: Need to remove and replace the intake manifold

it is a great deal of work. The molded gaskets breakdown with time. You'll want to change the two 90 degree elbows as well - they are available from a dealer for a reasonable price. Also, the blower gasket is likely shrunk up and /or blown out. And you might as well replace the valve cover gaskets too as they leak oil as they breakdown with heat and time.

I did all of this on mine. Even as a professional, it took me a good 6 hours.

Posted on Aug 11, 2010

  • 6826 Answers

SOURCE: ok. guys. i am losing coolant. it is not showing

If the coolant is leaking at the head gasket or the intake manifold gasket slowly, then new gaskets will have to be installed. The bubbles coming up is a bad sign that the seal of the coolant system is bad or it's overheating the coolant to the point that it boils over.

The overheating may be due to air or vapor in the cooling system not allowing fluid to flow freely.

Did you put a 50/50 concentration of coolant to water into the cooling system?

Also, check the fan to see if it is turning on when the car is at operating temperature at idle.

May need to be flushed out and new coolant installed to increase cooling efficiency.

Good luck on this repair.

Posted on Jan 14, 2011

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