Question about 1994 Buick Roadmaster

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My 1994 Buick Roadmaster overheats when sitting in traffic. It has a new thermostate and the electric fan works and it has a new radiator. Someone told me it could be the water pump,but its not leaking. Can you tell me if this is the problem and how to check it. Or what could be the problem. All so the temperature gage is not malfunctioning because it is running hot.

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Posted on Jan 02, 2017

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SOURCE: Radiator cap

You need to push down and turn at the same time.

Posted on Mar 10, 2009

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SOURCE: Buick Roadmaster radiator fan

hi Russ, it sounds like the temperature switch is bad. It is located under the hood, front engine area, driver side, end of intake manifold, mounted in the block. U should be able to test it w/ an ohmeter as follows: disconnect wiring (check for loose, corroded, etc as that could be the problem) remove temp. switch, place in an old pot w/ water on stove, w/ temp below 99 degrees, connect ohmeter to terminals, reading should be zero. Heat water to above 99 degrees, check , should read infinity. If it fails this test, it's time to replace it. Good luck, let me know how u make out Curt from Connecticut.

Posted on Mar 16, 2009

rteemon
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SOURCE: 1994 Buick Roadmaster

drain plug is at the bottom of the rad
and you have to fill rad thru coolant tank

Posted on Jul 01, 2009

airjer995
  • 5332 Answers

SOURCE: 1994 buick roadmaster 189000 miles. The engine

I find it funny nobody mentioned the cooling fans as a possibility. I am almost positive these have electric cooling fans. Especially if it is equipped with the LT1 350 engine. Do you hear the cooling fans coming on?

What happens if you put the car in nuetral and just raise the RPMs a little. Does the temp drop or does it continue to go up. If it goes down than you have a flow issue at low RPM (which could be a result of low coolant). If it goes up than I would be even more suspicious of the cooling fans not working.

Posted on Jan 30, 2011

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Hi,
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Oct 16, 2009 | 1994 Buick Roadmaster

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hi Russ, it sounds like the temperature switch is bad. It is located under the hood, front engine area, driver side, end of intake manifold, mounted in the block. U should be able to test it w/ an ohmeter as follows: disconnect wiring (check for loose, corroded, etc as that could be the problem) remove temp. switch, place in an old pot w/ water on stove, w/ temp below 99 degrees, connect ohmeter to terminals, reading should be zero. Heat water to above 99 degrees, check , should read infinity. If it fails this test, it's time to replace it. Good luck, let me know how u make out Curt from Connecticut.

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