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Thread: pressure tested and problems

  1. #1
    Junior Member Grease Monkey
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    Default pressure tested and problems

    ok so I got the car pressure tested (cooling system) because the 2 is overheating. looks like it was excessivly high in the mr2.. I was getting 160 psi. the cap is rated for 90psi.

    anyways to get to the point what does this mean

    blockage
    thermostats not opening...
    air in the cooling system
    blown head gasket?

    I just don't know where to start
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

  2. #2
    ---------HO00NS---------- Chief Engine Builder IN 05 NT's Avatar
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    Default Re: pressure tested and problems

    you were getting 16.0psi, not 160,

    cap is rated at 9kpa (which is 13psi), not 90psi,

  3. #3
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    Default Re: pressure tested and problems

    Sorry your right, read it wrong. (but the point is it got to this very quickly)
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

  4. #4
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: pressure tested and problems

    was water being forced out the cap before?
    "I'm a Teaspoon, not a mechanic"
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  5. #5
    ---------HO00NS---------- Chief Engine Builder IN 05 NT's Avatar
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    Default Re: pressure tested and problems

    much rust/scale/sludge in the rad?

  6. #6
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    Default Re: pressure tested and problems

    No water through the cap.
    there was sludge before the rebiuld as the gasget blew. However this was cleaned throughly.

    Any idea how much it might cost to get the whole cooling system for an mr2 cleaned and who does it?
    Or can i clean it? i have access to some very high pressure hoses.

    Thanks
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

  7. #7
    ---------HO00NS---------- Chief Engine Builder IN 05 NT's Avatar
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    Default Re: pressure tested and problems

    any rad shop is more then capable of over hauling it for you,

  8. #8
    Junior Member Automotive Encyclopaedia
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    Default Re: pressure tested and problems

    Was this test hot or cold, running or not, at idle or being rev'ed to get that 160PSI of yours???????
    What did they, the 'tester', say about the results - did they say '160psi'? If so, avoid them, but if you're doing this yourself, check its manual & search & read stuff.



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    I'm lost. To me, a 'pressure test' is pressurizing the cooling system AND the radiator cap, with a tool like this
    http://www.stant.com/index.cfm?locat...chStantPopular
    that pumps air thru the filler neck or thru the radiator cap, to see what happens @what pressure. You can also pressurize pretty well by squeezing a hose, after removing any air, cold & hot, with a known cap, the original or a . It's very good for finding leaks and testing the cap. It tests the system internally and externally by going 20 to 50% over the usual 9,12,15psi - .4,.7,1.0,whatever bar-kg/cm pressure it's spec'd for.
    The pressure should hold indefinitely - hours - with out going down. If it goes down without leaking externally, then remove the plugs and turn it over, then see or even smell if there is coolant in a cylinder/s.
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    I don't have much of a clue from your descriptions
    Is the cap not opening at whatever it should(9psi)? That is a problem, but it sure isn't any kind of a problem that would cause overheating, just a problem for over working/stressing the radiator, heater, water-pump seal and stretching hoses.
    ******************************************

    Quote Originally Posted by 2revup
    Sorry your right, read it wrong. (but the point is it got to this very quickly)
    How quickly? Sitting there idling at 850, fan/s going on&off or on a dyno at WOT?

    With ZERO experience & knowledge about the car you've got, and without the result of the radiator test for a blown head gasket's combustion gases that most suggested, and with all the knowledge & experience of the other people, I think '160psi' scares me. [i]
    Last edited by allencr; 16-02-2008 at 02:56 AM.

  9. #9
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    Default Re: pressure tested and problems

    I was not there unfortunatly whilst being tested ( at work) however i do know the block. From what i understand it was tested cold idle.

    At cold it dosnt idle itself (EMS) so it needs a foot on the pedal. I would have beenbetween 1000rpm and 1500rpm.

    I did yersterday change the thermostat. I havent driven it yet to see if this has any bearing on it. (needed the gasket goop to dry)

    If this is no good i will take it to a radiator shop and then can work there magic.

    Thanks for the help fellas.
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

  10. #10
    Junior Member Grease Monkey
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    Default Re: pressure tested and problems

    just to add it looks like it was a simple themostat.

    Thanks for all the help guys
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

  11. #11
    Junior Member Automotive Encyclopaedia
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    Default Re: pressure tested and problems

    Quote Originally Posted by 2revup
    a simple themostat
    THAT'S IT, after all this BS!!!!
    How was its(the fucking thermostat) test?


    http://www.toymods.net/forums/showthread.php?t=33013
    http://www.toymods.net/forums/showth...t=33013&page=2


    0-02-2008, 01:07 AM
    2revup
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    block or head gasket?
    Is there any way to tell if a block is cracked or its just a head gasget, apart from the obvious of pulling the damn thing apart.

    Also other symptions is there is no bubling there doesnt seem to be any discolouration in the coolent. the oil seems normal its not runny.

    The only thing i could see was that the coolent cap did have some sludge on it (wich is not promising.
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    10-02-2008, 02:04 AM
    2revup
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    Re: block or head gasket?
    the car is overheating, however from what i can see if i drive sensably no boost at all then i could get quite far with out issues, as soon as i give it a boot full then bang it starts to overheat.
    The current gasket is a TRD 1.2mm metal. and the funny thing is there is only about 15,000 since the rebuild.

    Any help here would be great, what are the tests i can perform if any to find out what is the go?
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    10-02-2008, 02:22 AM
    2revup
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    Re: block or head gasket?
    the other question is why, all of a sudden???
    the car has been sitting for some time, whilst the car does get a start every now and then, I wouldn't have driven the car for bout 2 - 3 months, could this have any bearing on the issue?
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    10-02-2008, 03:30 AM
    2revup
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    Re: block or head gasket?
    the power still feels nice, although there are some boosting it issues from 2second to third, but nothing i am concerned with more of a tuning issue.

    No i must adminit i didnt burp it. Which is something i think i need to re-vist anyways. But even with the old coolent it showed the same symptons, so i am not sure this is the issue.

    I will do a compression test ASAP.

    if it were sending water out the motor wouldnt it normal smoke white?

    It could be using the water, but if it is its doing it slowly.
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    10-02-2008, 04:13 PM
    2revup
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    Re: block or head gasket?
    o man, i dont understand how a plug can make it run lean, i understand about the gap of the plug, but know nothing on how a plug could make it run lean (unless maybe the plug wasnt firing, but then i would expect it not to idle)

    I will test compression and burp the coolent see how this goes.

    God help me if its a block.

    I was reading something on this actully they say when its cold the block is open (if cracked) and then when it heats up then the crack closes, i suppose this could be true!?!
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    10-02-2008, 09:24 PM
    2revup
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    Re: block or head gasket?
    Quote: allencr
    NO, it is not the block and has almost never been the block in any car, ever, it's just a phrase that people who don't know shit, like to say for some reason.
    Is it a race turbo/super charged running fuel(nitro/alcohol) or had ALL its core/welsh/freeze plugs pushed out by ice? If not, then it isn't the block.

    thats not entirly true i have seen a few cracked blocks in my time.

    Quote: allencr
    I haven't read any symptoms of overheating but you saying it.
    It's the gauge IMO.

    Not the guage because the EMS ecu is also telling me that the temprateure is rising.

    Hey Josh, Do you know if SAS has a borescope?
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    10-02-2008, 11:27 PM
    2revup
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    Re: block or head gasket?
    Thanks Josh Will give Rod a shout, fingers crossed its not cause if it is well i am really going to crack the block (i am trying to sell the car and this happens)


    Brad
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    1-02-2008, 12:35 AM
    2revup
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    Re: block or head gasket?
    yeah i know they have sevral bleed points most under the body of the car (pain in the butt)... I was doing the dodgy, just to possibly rule that out as an issue, as i dont have the car at my place so time and access can be limiting unfortunatly.
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    11-02-2008, 04:55 AM
    2revup
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    Re: block or head gasket?
    AAH i am with you now I will check this also.
    Thanks guys your a wealth of info.
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    15-02-2008, 01:29 AM
    2revup
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    pressure tested and problems
    ok so I got the car pressure tested (cooling system) because the 2 is overheating. looks like it was excessivly high in the mr2.. I was getting 160 psi. the cap is rated for 90psi.

    anyways to get to the point what does this mean

    blockage
    thermostats not opening...
    air in the cooling system
    blown head gasket?

    I just don't know where to start
    __________________
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

    15-02-2008, 02:25 AM
    2revup
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    Re: pressure tested and problems
    Sorry your right, read it wrong. (but the point is it got to this very quickly)
    __________________
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

    15-02-2008, 04:34 AM
    2revup
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    Re: pressure tested and problems
    No water through the cap.
    there was sludge before the rebiuld as the gasget blew. However this was cleaned throughly.

    Any idea how much it might cost to get the whole cooling system for an mr2 cleaned and who does it?
    Or can i clean it? i have access to some very high pressure hoses.

    Thanks
    __________________
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~

    Yesterday, 05:43 PM
    2revup
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    Re: pressure tested and problems
    I was not there unfortunatly whilst being tested ( at work) however i do know the block. From what i understand it was tested cold idle.

    At cold it dosnt idle itself (EMS) so it needs a foot on the pedal. I would have beenbetween 1000rpm and 1500rpm.

    I did yersterday change the thermostat. I havent driven it yet to see if this has any bearing on it. (needed the gasket goop to dry)

    If this is no good i will take it to a radiator shop and then can work there magic.

    Thanks for the help fellas.
    __________________
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~


    #10
    Today, 12:31 AM
    2revup
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    Re: pressure tested and problems
    just to add it looks like it was a simple themostat.

    Thanks for all the help guys
    __________________
    ~MR2 GT with a big arse turbo + a 3sgte built tonka tuff = lota Fun~


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