rover 75 overheating. Thermostat replaced, Head gasket replaced, still overheating
Country: AustraliaMake: Rover 75 ClubModel: 75Year: 2001Engine: V6
Replace Thermostat twice,
Replace headgaskets, machine cylinder head, rplaced rediator, replaced rediator cap, replaced hoses.
Lasted 1500 km then gone again.
Hello and Welcome! I'm Billy and i will assist you with your inquiry. Feel free to ask if any further info is needed.
That is really frustrating.....
When you say lasted 1500km, and then gone again....do you mean that it worked fine (no overheating) for 1500km, and now it is back to overheating?
do you have any other symptoms (tight hoses, air in system, coolant in oil, vibration at idle)?
The cylinder head was machined and the head gasket replaced about 1500 km or 1 months ago. Worked OK but now it overheated again. Coolant was virtually all lost.
if it worked ok for one month, then something happened after....how much did it overheat?
did the temp gage get to max?
car is automatic . Was stuck in traffic for about 5 minutes. previously the airconditioning/ heating acted funny.
Overheated suddenly. Needle moved to the top, Red light came on.
To proceed correctly, we need to look at this overheating instance as the first one....forget that you already fixed it.
Road service filled up radiator quite a bit of fluid was needed.
Now, you need to check for any leaks in the system, check if the fans (radiator fans) are operating, and then remove the water pump hose and check if getting proper flow.
First overheating was in summer, one of the hoses blew about 15000 km ago.
Having checked these (leaks mostly and rad fans), you should find your culprit.
The road service put pressure on the system. No indication of leaks.
ok, when you removed the head, did it have rust on it....or was it clean...?
Don't know about rust, but cylinder head was machined before re-assembly.
ok, if there was rust, this would mean that the head is no longer good, will leak coolant after a while, as the rust will continue on it.
But before getting to this, are the radiator fans operating when engine is warm?
Yes, the radiator fan works OK .
ok, then we have the water pump left. Test method: remove the hose on water pump, turn engine on at idle, check if you have proper flow from pump (then turn engine off, reconnect the hose, fill the system, bleed as well)
Billy, the mystery overheating is a problem with the Rover 75. Have you had any hands on experience with it yourself?
yes....more times than i can count.
It overheats for no apparent reason.....but then, when fixed, most of the times it works as good as new.
The reassembly work was done by a previous Rover dealer. Every component was checked.
every component meaning the water pump as well...........in this case, and as the water pump, radiator, fan, leaks, cap and bleeding were all checked and found to be up to norm, then there is nothing left but one of the following:
- head crack
- block crack
- faulty head gasket (which is least likely as this was replaced prior)
Well, that would mean to take the car to the wrecker. The tyres are almost new.
If the vehicle is in good condition, i would check for a used engine at a wrecker...and swap engines....at a relatively low cost, you will have the vehicle up and running.
You would be able to sell it at a reasonable price at least.
Thanks Billy, you did your best, how do you rate it?
You just click on one of the faces.....the one that describes your experience here, not your experience with Rover ;)
All the best. I hope the Chinese managed to fix it.
Thank you for your trust! Get back to me if you need more info..if not, Thank you in advance for the positive rating...http://www.justanswer.com/car/expert-billy/And do not forget to check out the other categories (health, law, taxes, vet, etc...)
Trainer 8+ years, master tech. 10+ years, SAE member