July 17, 201016 yr comment_452419 There are some radiator flushes out there, but I don't know how good they are. I can't see them cleaning the rust out very well. A bit of Google on the by-pass hose says it is to circulate water around the engine before the thermostat opens and to prevent cavitation in the pump. So its worth keeping it there if you can, but it won't be causing your overheating problem. Have a chat to some radiator guys about it and see if they have any ideas we've missed. Report
July 17, 201016 yr comment_452422 Overheating can be caused by anything that decreases the cooling system’s ability to absorb, transport and dissipate heat, such as a low coolant level, loss of coolant (through internal or external leaks), poor heat conductivity inside the engine because of accumulated deposits in the water jackets, a defective thermostat that doesn’t open, poor airflow through the radiator, a slipping fan clutch, an inoperative electric cooling fan, a collapsed lower radiator hose, an eroded or loose water pump impeller or even a defective radiator cap http://www.arrowheadradiator.com/overheati...s_and_cures.htm Report
July 17, 201016 yr Author comment_452424 http://www.arrowheadradiator.com/overheati...s_and_cures.htm Ok no worries thanks for all your help mate Report
July 17, 201016 yr comment_452426 This is all based on the assumption that you got all the air out of the system when you changed engine..... Park it facing uphill, rad cap off, heater on, fill with water, squeeze hoses while running, rev it up and down... Unlikely to be the problem but you never know. Report
July 17, 201016 yr Author comment_452433 This is all based on the assumption that you got all the air out of the system when you changed engine..... Park it facing uphill, rad cap off, heater on, fill with water, squeeze hoses while running, rev it up and down... Unlikely to be the problem but you never know. i have done that except i havnt had the car on a hill. will give it a shot now and get back to you Report
July 17, 201016 yr Author comment_452439 This is all based on the assumption that you got all the air out of the system when you changed engine..... Park it facing uphill, rad cap off, heater on, fill with water, squeeze hoses while running, rev it up and down... Unlikely to be the problem but you never know. Well I just jacked up the front of the car and started it with the cap off and there was abit of air but not much and yeah still the same problem. I can't seem to understand this o doubt it's rust blockage inside cause green coolant came out when I was putting it back in. Report
July 17, 201016 yr comment_452441 i'd be checking the sender unit. if you changed the motor then perhaps its the wrong sender for the guage in your dash! Report
July 17, 201016 yr Author comment_452451 i'd be checking the sender unit. if you changed the motor then perhaps its the wrong sender for the guage in your dash! i have already changed the sender lol Report
July 17, 201016 yr comment_452490 Well, its a puzzle! Why did you change engines? Can you rebuild the old one to drop it back in? Its a hell of a lot of work to strip the new engine to check if it is sludged up or not, I'd hate to do all that work and find out that the reason was something else. Now you mention it, last year we had the rolla overheat going up to northern/inland NSW before I fitted the mods and cleaned out the rust, and there has been no sign of the temp hitting halfway since. Might be because its winter! :) Report
July 17, 201016 yr Author comment_452523 Well I changed the motors cause my other one had done 700 000 km's lol. My new one is about 179000. do you know when the next cruise is in nsw? Wouldn't mind going if my cars going Report
July 20, 201016 yr Author comment_453197 Well, its a puzzle! Why did you change engines? Can you rebuild the old one to drop it back in? Its a hell of a lot of work to strip the new engine to check if it is sludged up or not, I'd hate to do all that work and find out that the reason was something else. Now you mention it, last year we had the rolla overheat going up to northern/inland NSW before I fitted the mods and cleaned out the rust, and there has been no sign of the temp hitting halfway since. Might be because its winter! :laff: even the local radiator specialist can't work it out lol. he told me to change my gauge and see if that helps. come to think of it i actually did change the whole dash cluster with the new motor because of the speedometer. i will give that a try ahah Report
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now