over heating

an52ep · Post by **an52ep** » Thu Dec 27, 2007 1:39 pm

i had this problem of over heating before,then i changed my water in let pipe ,and thermoster but still i have got the same problem while i drive above 95 speed the temperature needle goes towards hot.upto half way when i cantrol my spped upto 85 it comes down . the car isnot loosing any water .went to radiator speachialist he told me your radiator is blocked what u guys thinks?

cheers.

mr-charisma · Post by **mr-charisma** » Thu Dec 27, 2007 3:13 pm

What did the radiator guy recommend when you took your car in to him?

Surely he would have given you some options as to what you need to do to fix it?

Since you've said you've replaced your thermostat & piping (I assume you've replaced all the pipes?) I'll rule those out as the cause..

If as he said, your radiator is blocked... is it rusty? corroded? What did he do to diagnose the problem?

I also have to assume that its not just a case of coolant being low? Have you topped up the coolant a few times after you replaced the pipes etc, i.e. taking off the radiator cap a few times after driving it to make sure its still completely full? also that the reservoir tank is full..

Are you running coolant in it? or just water? Personally, I'd only put water in mine if it was an absolute emergency & there was no way I could get some coolant to put in..

When you replaced all the hoses etc, did you flush the radiator? / run a hose through it? / drain all the fluid out etc? and did you notice whether it was a really nasty colour?

If you have checked everything & still can't fix it yourself, take it back to the Pro's .. they might just run a hose through it if theres something causing a blockage & then charge you an arm and a leg .. or they could just tell you that you need to buy a new radiator..

Seriously though, it's a pretty serious problem & I wouldn't be driving it any further than straight to a mechanic & pulling over along the way to give it a rest if it gets too hot..

an52ep · Post by **an52ep** » Thu Dec 27, 2007 5:33 pm

hey thanx for the coment i jast look the radiator is full reseroir tank is a bit empty.after 3 weeks drive. jast ask from that guy the one fixed my thermostatr.he said he take the thermostatr off so there is no thermostatr at all.he changed the top radiator pipe.three weeks agowhen imy car get fixed i put 3 time radiator cleaner with water and flush the radiator but didnot run hose through it.i noiced the coolant in the reseroir tank rusty.today when i take my car to radiator specilist he jast look at radiator and said your radiatoris block i even didnot tell him that i dont have thermoststr in it.

SchumieFan · Post by **SchumieFan** » Thu Dec 27, 2007 6:52 pm

dude, theres your problem,

if you dont have a thermostat then your water is constantly going to be flushed through your engine, therefore, the friction in the engine at 95kph+ is boiling the water in the engine and heating the engine itself up. make sense?

you need to have the thermostat there to stop the water flowing through so the radiator can cool it down, thats the whole point in having a thermostat!

id replace it asap and dont use that guy again.

if thats not it try checking your oil lines, and pressure, if the oil pressure is dropping it may increase friction in the engine and heat the pistons/engine up that way, i would always install atleast a oil pressure gauge in any car, can quite often be the first sign of a major problem and give you the advantage of being able to shut the engine off before something catastrophic happens.

Mike.

payaya · Post by **payaya** » Fri Dec 28, 2007 2:59 am

I dont think thats how it works. Running your car without a thermostat will in fact make engine temps lower. The only reason the thermostat is there is to get engine temps up quicker.

The thermostat is there to keep cold water out of the engine not the other way around.

Post by **dstocks** » Fri Dec 28, 2007 8:16 am

Just a thought.

Check the overflow pipe is not blocked. Ive had that happen before and it causes a vacuum in the top radiator pipe and restricts water flow.

an52ep · Post by **an52ep** » Fri Dec 28, 2007 9:45 am

so that mine its nothing to do with termostatr.

FtoSam · Post by **FtoSam** » Fri Dec 28, 2007 10:35 am

just take your radiator out... take it to a radiator place... get them to pressure flush it...

Problem solved...

(had this exact problem before)

Mine was from apparently installing a new engine...

SchumieFan · Post by **SchumieFan** » Fri Dec 28, 2007 1:43 pm

payaya wrote:I dont think thats how it works. Running your car without a thermostat will in fact make engine temps lower. The only reason the thermostat is there is to get engine temps up quicker.

The thermostat is there to keep cold water out of the engine not the other way around.

yeah but after enough driving the water isnt cold anymore, and if you increase the acceleration, you increasre the heat and therefore the temp of the water.

whatever it is something is boiling it and the cooling aint doin its job, id get it flushed, wouldnt take the radiator out though.

payaya · Post by **payaya** » Fri Dec 28, 2007 5:38 pm

SchumieFan wrote:
payaya wrote:I dont think thats how it works. Running your car without a thermostat will in fact make engine temps lower. The only reason the thermostat is there is to get engine temps up quicker.

The thermostat is there to keep cold water out of the engine not the other way around.
yeah but after enough driving the water isnt cold anymore, and if you increase the acceleration, you increasre the heat and therefore the temp of the water.

whatever it is something is boiling it and the cooling aint doin its job, id get it flushed, wouldnt take the radiator out though.

I know what your thinking but it does not work that way. One you get to high temps your thermostat is open anyway so that means constant flow eg just like thermostat not being there. If you believe you theory is correct then all thermostats are useless.

an52ep · Post by **an52ep** » Fri Dec 28, 2007 6:27 pm

thanks guys .
my car get fixed today .it had a problem with the radiator blockeage and thermostat
the radiator was blocked 40% and put the thermostat in.i took that for drive half an hour on free way the temperature needle didnt go past half way .when the temperature needles comes in middle stay 4 a secound and goes back down .''

cheers

FtoSam · Post by **FtoSam** » Fri Dec 28, 2007 7:07 pm

Yep...

When mine happened.... well... it was more around 98% blocked... lol