datsun280zx Posted July 13, 2010 Share Posted July 13, 2010 I had problems with my zx of it over heating after about half an hour running. So i changed the thermostat, radiator, water pump, head temp. sensor and i thought the problem was gone. Now the car is running pretty good but when i get stuck at lights for a while the temp. starts going up but goes back down once i start driving again. Also theres a ticking coming from the valve cover and it seems like it gets louder as the engine gets to operating temps. Really need to get this fixed soon so any input is great.. Thanks! Quote Link to comment Share on other sites More sharing options...
stravi757 Posted July 13, 2010 Share Posted July 13, 2010 I had problems with my zx of it over heating after about half an hour running. So i changed the thermostat, radiator, water pump, head temp. sensor and i thought the problem was gone. Now the car is running pretty good but when i get stuck at lights for a while the temp. starts going up but goes back down once i start driving again. Also theres a ticking coming from the valve cover and it seems like it gets louder as the engine gets to operating temps. Really need to get this fixed soon so any input is great.. Thanks! check your oil, and tell us what you find. Quote Link to comment Share on other sites More sharing options...
Mikez31ss Posted July 13, 2010 Share Posted July 13, 2010 I had problems with my zx of it over heating after about half an hour running. So i changed the thermostat, radiator, water pump, head temp. sensor and i thought the problem was gone. Now the car is running pretty good but when i get stuck at lights for a while the temp. starts going up but goes back down once i start driving again. Also theres a ticking coming from the valve cover and it seems like it gets louder as the engine gets to operating temps. Really need to get this fixed soon so any input is great.. Thanks! Did you check the fan? Quote Link to comment Share on other sites More sharing options...
jc052685 Posted July 13, 2010 Share Posted July 13, 2010 I really dont know why everyone does not know these exist. http://www.sjdiscounttools.com/lis75500.html Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 13, 2010 Author Share Posted July 13, 2010 The fan and the oil are good. I was thinking of getting an electric fan to use with the mechanical fan.. would that maybe help the problem? Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted July 13, 2010 Share Posted July 13, 2010 Do a leak down test or compression test. Or go get them done at a shop. Also when you changed your coolant, was is full of rust or gunk? Also what type of coolant mix do you use? 50/50? I use 70water/30coolant and use water wetter. Quote Link to comment Share on other sites More sharing options...
misterZ Posted July 13, 2010 Share Posted July 13, 2010 I think Mikez31ss was referring to the fan clutch. The fan blade should be (tight) difficult to spin when the engine is cold and spins more freely at operating temp; If you can spin the fan blade when the engine is cold the clutch needs replaced--commonly overlooked as suspect to overheating problems. Quote Link to comment Share on other sites More sharing options...
Mikez31ss Posted July 13, 2010 Share Posted July 13, 2010 Thanks for clarifying that misterZ...that is indeed what I'd suspect if the car only overheats while stationary. Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 13, 2010 Author Share Posted July 13, 2010 Do a leak down test or compression test. Or go get them done at a shop. Also when you changed your coolant, was is full of rust or gunk? Also what type of coolant mix do you use? 50/50? I use 70water/30coolant and use water wetter. Yeah it was brown lol my old water inlet got so corroted pieces broke off and my old radiator was really clogged up. Ive tried somethiing like the water wetter and it worked for a while but not long Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 13, 2010 Author Share Posted July 13, 2010 I think Mikez31ss was referring to the fan clutch. The fan blade should be (tight) difficult to spin when the engine is cold and spins more freely at operating temp; If you can spin the fan blade when the engine is cold the clutch needs replaced--commonly overlooked as suspect to overheating problems. Oh ok I'll check that out today lol I wasn't sure what he meant Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 15, 2010 Author Share Posted July 15, 2010 I checked the spark plugs. no coolant but there was some oil on them, not alot though. Quote Link to comment Share on other sites More sharing options...
misterZ Posted July 15, 2010 Share Posted July 15, 2010 I checked the spark plugs. no coolant but there was some oil on them, not alot though. Not sure if you checked the fan clutch yet (I thought for sure that is your problem) but after seeing your post on the radiator, you might consider pulling it and take it to a radiator shop to get rodded or just replace it (if you have the funds). =/ Quote Link to comment Share on other sites More sharing options...
misterZ Posted July 15, 2010 Share Posted July 15, 2010 Sorry (at work & can't edit), I see you already replaced the radiator. Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 15, 2010 Author Share Posted July 15, 2010 im gonna check the fan today. completely forgot to check it befroe i drove it yesterday Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 16, 2010 Author Share Posted July 16, 2010 checked the fan and it spun freely while cold. Now im trying to decide if i should switch to electric fan or keep it mechanical..hmm which would be better for a daily driver? Quote Link to comment Share on other sites More sharing options...
Mikez31ss Posted July 16, 2010 Share Posted July 16, 2010 checked the fan and it spun freely while cold. Now im trying to decide if i should switch to electric fan or keep it mechanical..hmm which would be better for a daily driver? Mechanical. Simple, reliable, does not "rob horsepower" IMHO. Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 16, 2010 Author Share Posted July 16, 2010 Mechanical. Simple, reliable, does not "rob horsepower" IMHO. Ok cool. Any body got a extra fan clutch they wanna get rid of? lol Quote Link to comment Share on other sites More sharing options...
misterZ Posted July 16, 2010 Share Posted July 16, 2010 Ok cool. Any body got a extra fan clutch they wanna get rid of? lol You can buy new from AZ, O'Reiley's, etc for about $40. Quote Link to comment Share on other sites More sharing options...
srbigbutt Posted July 16, 2010 Share Posted July 16, 2010 You can always try to rebuild yours. There are articles on how to do it. Mine siezed up once and I rebuilt it. Its been fine for about 2 yrs. Quote Link to comment Share on other sites More sharing options...
datsun280zx Posted July 16, 2010 Author Share Posted July 16, 2010 I'll probably go with a new one lol i need something reliable cuz im gonna have drive 60 miles a day to school Quote Link to comment Share on other sites More sharing options...
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