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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My son took his car to Ramona tire shop because his 2006 mustang was overheating thay said the problem is this

they are not qualified to repair a wheel barrow
your son is wasting his money and time dealing with them
the first test for overheating is a compression test to check for head gasket or cracked head/s
water pumps do not cause over heating as they are only water circulators
thermostats often do and if not installed correctly will still cause a problem
find yourself an accredited service center with experience on your make of vehicle and get a proper diagnosis and quote

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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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Over heate my 2002 grand Cherokee . It has 3 codes po 300 po 301 po 302 . Blown head gasket ?

You are probably right as all codes refer to misfire in cylinders.. have a compression test done to check for blown head gasket and cracked/warped head and have a cooling pressure test done also to show cracked head and other than head gasket.

Jul 21, 2013 | Cars & Trucks

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2001 Pontiac grand am overheating problem. I have done new head gaskets new intake gaskets, new water pump, new thermostat, new radiator, new reservoir w/ cap. system has no leaks pressurized for 2.5...

Have a cylinder leakage test or co2 test done. my prefered method is a leakage test as it checks heads, head gaskets, valves, rings all in one test.

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Can you blow a head gasket and not get any water in oil .what should cyclinder read on compression test

I can give you part of your answer: yes you can blow a head gasket and not get water in the oil. The pressure can leak in to the coolant system.

I'm not sure what the pressure should be on your car but the difference shouldn't be very much.

Nov 08, 2011 | 1995 Volvo 850

1 Answer

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.
Removal of the head can be done with engine in place. Once off, check the face of the head with a straight edge and if not true have it machined by an engine reconditioner. While the head is off, it may be advisable to check the valves and valve seats for wear and replace the valve stem seals as they tend to be worn and and hard due the age of the vehicle. If the engine is fitted wth a timing belt it may be advisable to replace this also if more than 50,000 miles / 80,00 Km has elapsed since it was last changed.

Jan 11, 2011 | 1988 Toyota MR2

1 Answer

Head gasket was leaking on my 86 mr2 Replaced the

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.
Compression to be anything above 100 psi will firean engine ,sometimes lower too.

Nov 01, 2009 | 1986 Toyota MR2

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


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

Oct 19, 2008 | 1991 Toyota MR2

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