over heating issue and ive changed alot of parts :s

[jbangr]

ok so it first started off over heating through drive through maccas couple months back, took it to macnics and said was the thermostat, that was changed was good for a couple of weeks, same thing happens over heating through maccas and sometimes just out of the blue, took back to macanics adn now sed the radiator was f**ked so got that change aswell as a new water pump. a month down the track driving at like 12 at night freezing cold the neddle reached to the top then slow;y came back down. WHAT IS WRONG SOMEONE HELP. i hate wasting my money on getting things fixed that wasnt the problem. anyone out there know what the happs is? cheers guys. jay

[ashbox]

could be one of the sensors, maybe get it hooked up to a diagnostic machine and they should be able to source the issue, maybe try a diff mechanic to

[jbangr]

how much will it cost and where can i ge it done and yes i think ill change macanics

[VTLS1]

change mechanics dude. he sounds like one of those ones that just see dollar signs over a customers head. firstly,a new thermostat can be faulty. it is known to happen which is why all thermostats should be tested before installation. secondly,if your radiator & waterpump was stuffed,did he just tell you that out of the blue or what? the system should have been pressure tested to confirm any leakage,a 2 minute job at the most & you would know wether it was stuffed or not. at the moment you best bets to get a tech 2 on it from holden service dept or some auto elec have devices that will do similar things,& have a diagnostic scan through the system. this will tell whats wrong & whats not wrong. chances are unless you car has actually overheated & the warning on you dash display came up engine hot or whatever,you just got a temp sender or sensor unit at fault.

[stocky]

changed your radiator cap?

[Super_Low 91]

changed your radiator cap?

+1 for that, solved my overheating by just changing the cap,

[88GreenVN]

I'd say you have air in the system and when the pocket of air hits the sensor - bingo.

Are the hoses real tight when the needle is at it's hottest? Is the car really getting hot or is it just the sensor for the gauge in hot air????

[S.T.K.E]

changed your radiator cap?

Sorry i have to ask whats the theory behind this. Not holding it's seal?

To the OP. When the needle jumps all the way to the top is there coolant over flowing or steaming. If not it could just be a faulty water temp sensor. It's like a $20 part if that.

[88GreenVN]

Sorry i have to ask whats the theory behind this. Not holding it's seal?

I think that is the theory. Under pressure the cap lets a little coolant out every time it hits running temp - dropping the level of coolant and then getting air pockets. Temp then goes crazy real quick.

My 88 wagon is drinking coolant with no sign of it dropping on the driveway (most common way to find a coolant leak) The car still has good compression and so the head gaskets should be OK. Car runs OK. On closer inspection I noticed the Calais insulation on the bonnet was rubbing on the radiator cap - which may be letting the coolant out that way??? There is no mess under the bonnet tho - no coolant oily smear. It's a puzzle. This loss of coolant tho leads to dash setting off temp warning chimes when the coolant gets low.

I think I will change the cap just to see if the loss stops.

[jbangr]

i cant really see if its overflowing or anything cuz im driving at the time no steam or anything seems to be coming out but it usually hppens but hasnt lately just once out of know where, i find when the fans kick in and im in a confinded space its starts rising but a couple o days ago was driving home and it was freezing out side it just startedto climb and reached just below H but herd the hot sound beeping noise does anyone recommend a macanic a DECENT one lol

[mummbles]

Sorry i have to ask whats the theory behind this. Not holding it's seal?

To the OP. When the needle jumps all the way to the top is there coolant over flowing or steaming. If not it could just be a faulty water temp sensor. It's like a $20 part if that.

fluids reach their boiling points at a higher temp when under pressure.

[W84N01]

My VN was doing the same thing a few years ago, and after replacing just about everything under the bonnet that we thought it was, it ended up being my head was stuffed. So i had it bored out and had sleeves put in, and not only did it stop the over heating, but it improved the power a bit too LOL.

What State are you in? I can recommend a great mechanic if you are in WA......

[jbangr]

vic mate thats what it could be never know lol

[raskalz]

My VN was doing the same thing a few years ago, and after replacing just about everything under the bonnet that we thought it was, it ended up being my head was stuffed. So i had it bored out and had sleeves put in, and not only did it stop the over heating, but it improved the power a bit too LOL.

What State are you in? I can recommend a great mechanic if you are in WA......

hi. im in perth can i know the machanic u recommend?

[W84N01]

Hey raskalz. Custom Mechanics in Rockingham. Guys name is Glenn.9527 7787.

Lady at the front counter is called Kate, and she is a brilliant lady. Tell them Debs from Bunno sent ya and they will look after you

[W84N01]

Also, if anyone is after a dyno tune on their car, go see Aaron at In Tune Performance....his number's in the book or online