Question about 1991 Toyota MR2

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Mr2 head gasket

Hi, replying to your question about the head gasket. He only took a look he never done any pressure tests or anything else as far as i know. The guy dropped the car of with out me getting a chance to talk to him and just left a message with my friend who originally brought the car up to him. From then on he has been impossible to get hold of, so as you can see i felt none the wiser.

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Hooking up proper test equipment to the engine is the best way to check for a bad head gasket; usually, air is injected from a air compresser hose into the spark plug holes, with that cylinder having the valves closed. If coolant starts to bubble out of the coolant filler tube, it would then be safe to pronounce the gasket bad. Try some SteelSeal.

Posted on Oct 20, 2008

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Coolant disapears with no leak visable


have a compression test done and look form head gasket or cracked head. Have a coolant pressure test done and look for leaks at the back of the motor from rusted welsh plugs/head gasket

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My sons 1988 mr2 has very low compression in #2 and #3. I have a feeling it is rings. Can I do an in frame repair or do I have to remove the motor, and if so, do I need to drop it out the bottom or can I...


Have you done a wet compression test on all the cylinders, which entails squirting some oil (about 1/4 cup) into the plug holes to help seal around the rings and re-doing the compession test.
If the pressure goes up by a fair amount (40 - 60 Lbs) then it is definitely the rings but if it only increases by around 20 lbs then it is either valves or the head gasket is leaking between #2 & # 3.
I would first suspest a warped head , especially if engine hsa been run low on coolant and allowed to over heat.
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1 Answer

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is the radiator low on coolant? dont think you have a bad head gasket, does sound more like a bad cooling fan and/or thermostat

Feb 07, 2010 | 1991 Honda Accord

1 Answer

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Check all the wiring connections that you loosened or took off when you removed the head. something is loose or disconnected ,eg., ground wires .
Make sure you have spark at spark plugs whemn cranking ,and fuel pressure.
Did you try spraying starting-fluid in the intake, see if the engine runs for a little bit.
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1 Answer

Mr2 mk2 rev 1 1990 3sfe engine oil leaking form sump i did remove the sump and reseal it was ok . when runnig engine but started to leak when i turned off engine the temp stays below halfway the the front...


if yoiu have an oil pressure gauge is the pressure good? check the pressure and also cjeck the thermostat and water pump those are major causes of overheating if you have water in your oil ( check dipstick for 9oil and if its foamy and light brown you have a head gasket problem if not its something else of what Imentioned)

Sep 25, 2009 | 1991 Toyota MR2

1 Answer

Mr2


Try that SteelSeal that you are talking about. Just follow the directions exactly.

Oct 19, 2008 | 1991 Toyota MR2

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