KNG_555 Posted November 11, 2009 Report Share Posted November 11, 2009 Hey guys ive got a 5k with extractors/2.5 inch exhaust 32/36 DGV carbi. Unsure of cam/head work. My 5k engine hits 3/4 on the temp after its been running for a while, i've checked if temp gauges etc were faulty by an auto electrician but there all fine...i recently did a pressure test on the radiator (my radiator has water in it) pumped 13 psi and seemed to hold pressure just fine, i did pump it up and pull all spark plugs out and turned over the engine, abit of sum water/mist came out of cylinder 1 and 3... which means might have slight head gasket crack right? but unsure if thats why its over heating... Also there is no thermostat in my 5k..which means my car will only be over cooling right? So that can't be the problem to the over heating...? I'm thinking of flushing the water out and replacing with coolent..but it wont make that much of a difference..surely that can't be why its over heating. I'm thinking of putting a thermostat in..as my car didnt come with one.. just running out of ideas what the problem can be. If any one has any help please let me know..as i jus put rego and now can't drive it peacfully!! :S Cheers john Quote Link to comment Share on other sites More sharing options...
kangaroosa Posted November 11, 2009 Report Share Posted November 11, 2009 Are you running the standard fan? Is it still shrouded? If your running a thermo fan, is that shrouded? Does it overheat just at idle, or does it overheat whilst driving aswell? Quote Link to comment Share on other sites More sharing options...
KNG_555 Posted November 11, 2009 Author Report Share Posted November 11, 2009 is has a bolt on clutch fan (bigger than factory 4k size) no shroud is on..but i do have it. It begins heating up in traffic, and wen you drive it drops down abit cheers Quote Link to comment Share on other sites More sharing options...
BReNt Posted November 11, 2009 Report Share Posted November 11, 2009 Are you sure it's even over heating??? Did it used to only read half way and it has only started doing this? Or is this the 1st time you've run the engine and this is what it went to?? It may have an in correct reading from using the temp sender in the 5k with the 3k/4k thing in the dash. Try hooking up an after market temp gauge and see what it says? Quote Link to comment Share on other sites More sharing options...
anastasios Posted November 11, 2009 Report Share Posted November 11, 2009 i use a 4ac clutch fan on mine, i think it would be smart to use a thermostat and also use coolant Quote Link to comment Share on other sites More sharing options...
KNG_555 Posted November 11, 2009 Author Report Share Posted November 11, 2009 wen i first got it (no rego) just had it idling in garage..no problems... as i got rego and started driving it after about 20mis to 30mins of driving its fine...but after that wen i hit traffic it hits 3/4 maybe even higher, ive popped the bonnet while running(wen temp was hot) and radiator isnt steaming etc like the engine isn't actually hot.... I'm thinking of hookin another temp gauge...but don't think i have one... cheers Quote Link to comment Share on other sites More sharing options...
Evan G Posted November 11, 2009 Report Share Posted November 11, 2009 (edited) well if coolant leaks into the combuston camber at 13psi imagine whats going on when the air/fuel is being ignited at (180psi), also having no shroud will cause it warm up alot because the fan isnt sucking air from the radiator, its just sucking it from the engine bay just try put the shroud back on go for a drive and see if theres a improvement also try giving the fins on the radiator with a high pressure spray from the car wash just incase its blocked Edited November 11, 2009 by Evan G Quote Link to comment Share on other sites More sharing options...
crunchie Posted November 11, 2009 Report Share Posted November 11, 2009 If there is build up in the motor and radiator, put a cup of diesel in the radiator, drive it around for a while (get it up to temp) then flush it out. Fill back up with water, drive it around and flush it, keep doing this until the water is clear (mabey up to 4times) I had a similar issue this worked for me. Quote Link to comment Share on other sites More sharing options...
philbey Posted November 11, 2009 Report Share Posted November 11, 2009 Is it actually overheating? As in is there copious steam coming out the overflow, or is it just running hotter than usual. First - Put a thermostat in, it's an 8 buck part. Common misconception that it runs cooler, I think you'll find it will tend to run hotter. Second - Put coolant in, it has better thermal properties than water. Third - Put the fan shroud on, you'll get better cooling. If these 3 things don't work, come back to us then. Quote Link to comment Share on other sites More sharing options...
KNG_555 Posted November 11, 2009 Author Report Share Posted November 11, 2009 ok sounds good mate thanks ill give that ago..hopefully that works! Quote Link to comment Share on other sites More sharing options...
KNG_555 Posted November 11, 2009 Author Report Share Posted November 11, 2009 (edited) sorry forgot to add no steams out of overflow etc..haven't seen steam anywhere... Edited November 11, 2009 by KNG_555 Quote Link to comment Share on other sites More sharing options...
SLO-030 Posted November 11, 2009 Report Share Posted November 11, 2009 +1 for coolant. I had to use water once. (i had no coolant left :S) and i was suprised at how much warmer it got with the water instead of coolant. Quote Link to comment Share on other sites More sharing options...
philbey Posted November 11, 2009 Report Share Posted November 11, 2009 also having no shroud will cause it warm up alot because the fan isnt sucking air from the radiator, its just sucking it from the engine bay Shrouds don't prevent hot air from the engine bay coming through. When you have a shroud, the suction from the fan creates low pressure in between the radiator and the shroud, ensuring that air is drawn through the total radiator area, which ensures your full radiator surface area is being used efficiently. If there is build up in the motor and radiator, put a cup of diesel in the radiator, drive it around for a while (get it up to temp) then flush it out. Fill back up with water, drive it around and flush it, keep doing this until the water is clear (mabey up to 4times)I had a similar issue this worked for me. I'd use a bottle of proper radiator flush - putting diesel in a Radiator seems fairly unwise to me. Quote Link to comment Share on other sites More sharing options...
BReNt Posted November 11, 2009 Report Share Posted November 11, 2009 I'd use a bottle of proper radiator flush - putting diesel in a Radiator seems fairly unwise to me. +1 Quote Link to comment Share on other sites More sharing options...
KNG_555 Posted November 13, 2009 Author Report Share Posted November 13, 2009 hey guys i've done the following 3 things... and there is no problem now :). Sits exactly on half way. If its heats up again i shall let you guys know cheers p.s any sydney rolla cruises coming up Quote Link to comment Share on other sites More sharing options...
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