overheatring 304

[twinturbo5l]

hi guys just looking for some in put on what may be causeing it to overheatring has a new raditor and thermasate....it is not overheatring if you drive like an old mole only when you start to put you foot in to it say just 1st and 2 second them back of do it 3-4 times and she hot?


Nat

[vnv8driver]

perhaps your problem lyes in a oil/coolant problem such as a head gasket? maybe thats to blame for your 'low' performance. the clutch fan should take care of things, with the motor running is it restricted at all & free spin??

could also be the waterpump does the coolant in the radiator circulate with the motor on? if you can tell by looking in the radiator fill point then remove it and inspect the fins

[Vt-Brrrlina]

change to au twin thermos - i did - never seen the temp guage go down so quick...

[twinturbo5l]

perhaps your problem lyes in a oil/coolant problem such as a head gasket? maybe thats to blame for your 'low' performance. the clutch fan should take care of things, with the motor running is it restricted at all & free spin??

could also be the waterpump does the coolant in the radiator circulate with the motor on? if you can tell by looking in the radiator fill point then remove it and inspect the fins

clutch fan fan has resietens and is not free spining
waterpump looks new

[twinturbo5l]

change to au twin thermos - i did - never seen the temp guage go down so quick...

you got pic's of how you did it???

[Vt-Brrrlina]

nah ill get some tonite tho - my cars gettn some work doen to it today ... bought the twin au's for 120 dollars u have to trim around where the top and bottom hoses were so they go on.

then the au thermos have like a top lip thing i made a small metal bracket which extends that just a little bit more because the vn vp radiator has small holes on top u can screw into so as easy as -- then bought a temp switch to run it

oh forgot the cold airn intake goes over the topof radiator hiding the bracket so all nice ad neat

[Emackulation]

You stated you had crap performance in another thread right? Well like VNV8 said, the low performance and overheating problems will be hand in hand, find the problem and both will be solved.

[twinturbo5l]

You stated you had crap performance in another thread right? Well like VNV8 said, the low performance and overheating problems will be hand in hand, find the problem and both will be solved.

yes but i dont think it is a head gasket as i not losing water or oil and there not mixing togethere but when it heated up and took the rad cap off the water was not the best as in looks like it has been in there for yrs and stunk and when it was drying up it was going sticky


Nat

[Vt-Brrrlina]

this is the best pics i can do of my twin thermo setup - the second pic shows the temp switch the rest give basic idea of how i mounted it - looks neat under the cold air intake

the 5th pic shows where the holes roughly are on top of the radiator to mount the thermos i extrended that little flap accross the middle part to be able to screw it onto the top of the radiator which is then covered over by the cold air intake

[twinturbo5l]

well guys just thought i would give you all an up date.......well flushed out the cooling system as best i can and removed the thermastate and know she says cool.....can put your hand on the top hose and it well be marm and the opposite side is cool.....



yes i know if you take out the thermastate the water will flow to farst and not cool down befor it gets back to the motor but that is not all ways the case with every car

so i'm thinking i will go get a new thermastate agen and see if it works...

[twinturbo5l]

Ok guys here is where i'm at

put new thermostat in and new clutch fan which has helped a lot when driving it sits blow 1/2 the minuet you slow or stop it gets up to 3/4 i don't know if it will go every more as i turn it off....also after driving it the top rad hose has no pressure in it so while it is idling i can take off the radiator cap and then turn it off and all i get is a fountain of water out of the radiator?

Nat

[twinturbo5l]

Ok guys here is where i'm at

put new thermostat in and new clutch fan which has helped a lot when driving it sits blow 1/2 the minuet you slow or stop it gets up to 3/4 i don't know if it will go every more as i turn it off....also after driving it the top rad hose has no pressure in it so while it is idling i can take off the radiator cap and then turn it off and all i get is a fountain of water out of the radiator?

Nat

BUMP can any one help??????

[HARVZ-6]

so when its running you can take he cap off fine, but once turned off the water shoots back out the radiator?

[twinturbo5l]

so when its running you can take he cap off fine, but once turned off the water shoots back out the radiator?

yep............

[HARVZ-6]

if the water is coming out fast ie under pressure like its suddenly boiling thats because by pressurising water, the boiling point is raised up over 100degrees like normal, when the pressure drops and the coolant is already at normal op temp of about 104degrees the water rapidly boils...

but if your saying there is no pressure on the top hose id say the system isnt holding pressure.. do you lose any coolant at all?

and out of interest.. what is your ignition timing set at? that can cause over heating.. did it ping at all under heavy throttle or load?

[twinturbo5l]

if the water is coming out fast ie under pressure like its suddenly boiling thats because by pressurising water, the boiling point is raised up over 100degrees like normal, when the pressure drops and the coolant is already at normal op temp of about 104degrees the water rapidly boils...

but if your saying there is no pressure on the top hose id say the system isnt holding pressure.. do you lose any coolant at all?

and out of interest.. what is your ignition timing set at? that can cause over heating.. did it ping at all under heavy throttle or load?

there is pressure the just not rock hard

ignition timing is 10 BTDC in thing mode

[HARVZ-6]

well it shouldn be rock hard just firm with some give..

i assume thats standard timing?

what rating thermostat did you install?

are you running antiboil/freeze?

[twinturbo5l]

well it shouldn be rock hard just firm with some give..

i assume thats standard timing?

what rating thermostat did you install?

are you running antiboil/freeze?

no no it's not rock hard it is firm with some give

yes timing is standard

no not running antiboil/freeze yet untill i work out whats up with it as it will cost me more $$ have time i need to put more in it

[HARVZ-6]

If you have a multimeter and a work manual it'd pay to check the temp sender unit to make sure its working properly
could be a faulty gauge reading..

also if you have the time check your water pump...
in some cases the blades wear and corrode causing lack of water flow which could explain the problem of when your stopping its heating up