Page 3 of 4 FirstFirst 1234 LastLast
Results 31 to 45 of 60

Thread: 4age cooling system problems

  1. #31
    Gary Motorsport Inc. Too Much Toyota takai's Avatar
    Join Date
    Oct 2005
    Location
    Victoria
    Posts
    5,543

    Default Re: 4age cooling system problems

    Yeah, my auto AE71 remanufactured rad copes admirably even with the race engine. Keeps it at about 80* even at Mallala.
    -Chris | Garage takai - Breaking cars since 1998
    Sparky - AE86 IPRA Racer | RZN149 Hilux - Parts and Car Hauler
    I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself. - D.H.Lawrence

  2. #32
    Fuel Economy Warrior Carport Converter Vios-GT_07's Avatar
    Join Date
    Mar 2006
    Location
    WA
    Posts
    1,720

    Default Re: 4age cooling system problems

    good to hear it's all sorted out...

    come the next drift event.. if there are any dramas .. just get a thermostat that opens up earlier... otherwise take it out.. then after the drift put it back in..

    but IMO the engine will cop it bad without a thermostat at a drift event... then again i have been proven wrong so we'll see
    Research has shown child in front seat causes accidents, accident in back seat causes child

  3. #33
    CAE86 Grease Monkey ae95's Avatar
    Join Date
    Oct 2005
    Location
    WA
    Posts
    112

    Default Re: 4age cooling system problems

    maybe it was not such a good idea to run 100% toyota red without mixing in some water

  4. #34
    Fuel Economy Warrior Carport Converter Vios-GT_07's Avatar
    Join Date
    Mar 2006
    Location
    WA
    Posts
    1,720

    Default Re: 4age cooling system problems

    Quote Originally Posted by ae95
    maybe it was not such a good idea to run 100% toyota red without mixing in some water
    where's YLD when u need him to quote this?

    one of the old school tricks of "keeping it cool" is to run a higher mix of water to coolant to keep engine cool at the cost of corroding the head.. but ideally you should follow the directions on the bottle with regards to mixture..
    Research has shown child in front seat causes accidents, accident in back seat causes child

  5. #35
    R.I.P. Pentamax Chief Engine Builder Adsport's Avatar
    Join Date
    Oct 2005
    Location
    wa
    Posts
    3,271

    Default Re: 4age cooling system problems

    haha Ian (ae95) you dumbass
    My fat AW11 poobarge - 4AGZE (retired)

    My Corolla ! - 4AGTE

    KP61 - 4AGE

  6. #36
    Raastler Grease Monkey
    Join Date
    Aug 2005
    Location
    WA
    Posts
    153

    Default Re: 4age cooling system problems

    The problem is still there guys, It was fine for awhile drove it to work today, was fine, but on the way home started getting hot, then it overheated almost, got home just intime.

  7. #37
    back into it Chief Engine Builder
    Join Date
    Mar 2006
    Location
    nsw
    Posts
    3,991

    Default Re: 4age cooling system problems

    Cracked or warped head or gasket creep. as ill say again!
    you pump cant be that gone without noticing etc go

  8. #38
    JZ Powered Too Much Toyota EldarO's Avatar
    Join Date
    Oct 2005
    Location
    Western Aus
    Posts
    5,614

    Default Re: 4age cooling system problems

    Quote Originally Posted by Adsport
    cooling systems does not pressurise at all. overflow bottle has not gained/lost any fluid. coolant is bright green with no bubbles/gasses/frothing
    am i the only person that has seen this, and is pretty much certain that this is either the cause of the problem, or a product of it?!

    you sure you rad cap isnt bung matt?

    Eldar.O.

  9. #39
    back into it Chief Engine Builder
    Join Date
    Mar 2006
    Location
    nsw
    Posts
    3,991

    Default Re: 4age cooling system problems

    No one is that silly

  10. #40
    Raastler Grease Monkey
    Join Date
    Aug 2005
    Location
    WA
    Posts
    153

    Default Re: 4age cooling system problems

    rad cap isnt bunged.

  11. #41
    Junior Member Too Much Toyota oldcorollas's Avatar
    Join Date
    Aug 2005
    Location
    sydney
    Posts
    12,496

    Default Re: 4age cooling system problems

    since everyone else is guessing

    thermostat does two jobs. one, to slow water a lot when cold, adn two, to provide some resistance when hot, so that the water pump can pressurise the block a bit, and reduce the chance of hotspots. just removing the centre might still be ok. maybe it still lets too much water thru tho... you could try with a plate with a smaller hole.. say, half the area. see what happens?
    earlier opening thermostat will do nothing for an overheating engine.. (once it's open... it7s open it just stops the engine from being too cold.. but a lower cold than usual)

    the seal of the water pump should be fine. there is little chance it could suck in air (unless there was a net vacuum in the block?) if water is not leaking form there, leave it alone

    progkamol, your fan switch (the thing the plug was pulled off) is either dead, or the threads are dirty. pull the sensor out, clean the threads, reinstall, MAKING SURE there is electrical contact between the sensor body and the thing it screws into.
    (as said before.. stop letting your mates touch your engines they have no idea )


    back to problem..
    if it was getting that hot, then you would lose some fluid by expansion... or if it got really hot, by boiling (but only really hot). is there a chance that when the sender was installed, it doesn't have as good contact with the head as before? have you checked with a different temp meter that the temps are actually that high? (ie, stick k-type thermocouple in the radiator water and measure directly)

    i would also check the compression yourself.. 150 seems a fair bit low

    160rwhp? so it's not just a 100kw then . check your radiator cap is functioning or borrow one/buy one.
    check radiator is actually getting hot (by hand, and the water by thermocouple)
    check the temp sender. pull it out and stick in hot water, with a thermocouple, and check it is reading correctly... it could have been damaged during the swap (but unlikely)
    check for hotspots, check water lines etc..
    check compression.
    could there be crack from exhaust into coolant? but not losing any? hmm

    could you have too much timing... since now you have (supposedly, but not from the figures given) higher compression, then you might need to back off timing a bit, or add a bit more fuel (check AFR's)....

    anything else?
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  12. #42
    back into it Chief Engine Builder
    Join Date
    Mar 2006
    Location
    nsw
    Posts
    3,991

    Default Re: 4age cooling system problems

    I aint guessing, just going by what has been done. it has a thermostat in it now!
    Very hard when you not looking at it yourself

    turbo i missed that! to easy
    Last edited by kingmick; 24-08-2006 at 08:21 PM.

  13. #43
    Junior Member Too Much Toyota oldcorollas's Avatar
    Join Date
    Aug 2005
    Location
    sydney
    Posts
    12,496

    Default Re: 4age cooling system problems

    but it's turbo right?

    still, compression is low for an unopened 100kw 4AG...


    quoted for posterity
    Quote Originally Posted by kingmick
    I aint guessing, just going by what has been done. it has a thermostat in it now!
    Very hard when you not looking at it yourself

    it would be 160hp at the wheels on a great dyno! hhahahahahah thats better than a lot of 7age 1.9litre race motors


    aftermarket management.

    did you swap the same injectors over when you changed engines?
    Last edited by oldcorollas; 24-08-2006 at 08:25 PM.
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  14. #44
    SC14'd Member Domestic Engineer nick.parker's Avatar
    Join Date
    Nov 2005
    Location
    Canterbury
    Posts
    660

    Default Re: 4age cooling system problems

    hermostat does two jobs. one, to slow water a lot when cold, adn two, to provide some resistance when hot, so that the water pump can pressurise the block a bit, and reduce the chance of hotspots.
    On the 4AGE, the thermostat regulates the BLOCK water temperature by mixing water that has been to the radiator and come back (cold) with water from the 'heater outlet' on the block (hot). It is just a temperature dependant 'mixer' of sorts.

    The point of letting the system become pressurized (which occurs only becasue the water exceeds 100degs at standard pressure and the cooling system is SEALED) is ONLY to increase the boiling temperature of the coolant, and stop 'steam pockets' forming. As for exampling sitting still and idling on a 40degC day the water can exceed 100degress. The pump does not pressurise the cooling system, it only circulates water.

    When the engine is very cold, the hot water from the main water outlet is STALLED by the closed thermostat (closed because its cold), BUT the 'heater outlet' is routed to the other side of the thermostat (which effectively enables the thermostat to sense engine temperature when engine is 'cold'), and that hot water returns straight back into the block - no water goes to the radiator. An 'always circulating' path is used by your heater too, so it starts working as early as possible after cold engine startup.

    When the water is hot enough, the thermostat beings to open and so long as sufficient heat is always removed from the hot water by the radiator, the system will be regulated by the simple but ingenious THERMOSTAT which opens more when the engine is too hot, to add more cold water, or closes more when too cold to allow the temperature to increase.

    The system is most restrictive towards the pump when the engine is cold. And when the engine is HOT the water can most easily circulate since the radiator path will be atleast partially open.

    The thing to note is water is NEVER stationary inside the block, but it IS stationary inside the radiator when the engine is a fair bit colder than the thermostat setpoint.

    Does the water in your radiator get hot?

    Regards, Nick
    Last edited by nick.parker; 24-08-2006 at 09:03 PM.
    == 4AGZE SC14 Supercharged ==
    Now flogg'n the SC14 @ 18psi....

  15. #45
    Raastler Grease Monkey
    Join Date
    Aug 2005
    Location
    WA
    Posts
    153

    Default Re: 4age cooling system problems

    it has ran as a turbo car before on the old engine, everything was fine, atm its running 8deg btdc previously it was like 12deg. We have put the thermostat in, but thats when it overheated again yesterday. most of the things you have suggested are ok and or have been checked.

Similar Threads

  1. Sam-Q's 20V RWD Cooling System Guide
    By Sam_Q in forum Engine & Driveline Conversions
    Replies: 14
    Last Post: 27-03-2007, 05:08 AM
  2. Cooling Systems - Overheating Problems.
    By BrianRA23 in forum Tech and Conversions
    Replies: 4
    Last Post: 24-06-2006, 08:40 PM
  3. Your suspension & you...
    By Smokey228 in forum Tech and Conversions
    Replies: 12
    Last Post: 23-05-2006, 07:41 AM
  4. 4AGE cooling system - an observation
    By roadsailing in forum Tech and Conversions
    Replies: 1
    Last Post: 18-12-2005, 11:01 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •