Having problems with your Nissan Z ?

Overheating hi, i have a 1999 998cc 16v micra. 110000 miles on clock. engine sounds brand new but had a problem overheating the other day. the radiator cap came off as i was driving and there was coolant all over the engine bay. i am not totally sure if the cap was on correctly but i think it was (there is no damage to the cap or the bit it screws into) also checked the oil and there was not very much in. i filled the radiator back up and replaced the cap correctly and the engine overheated agai

Posted / edited by AnonymousUser on : 01-06-2020

Answers :

Ok, first It is almost impossible for a radiator cap to come off on it's own once it has been screwed on correctly. So I will assume it wasn't. If that's the case then It's possible that you did not completely refill the coolant system once you found the problem. The cooling system is a closed system until the thermostat has been heated sufficiently to open, thus opening the system.
If the motor was not warmed up or you did not recheck it once it had warmed up after the first fill. Then that might have caused the second overheating.
You are not going to know for sure until you have used it enough to get it up to normal operating temperature for a sufficient period of time.
Just be sure to keep an eye on you temperature gauge and DO NOT DRIVE IT IN AN OVERHEATED CONDITION! (like my mother :) ).
Even a few minutes driving overheated can warp the head. Much money will you be parted from after wards.
Just let in run in your drive way for 15 or 20 minutes, and keep an eye out for any leaks. If the temp stays steady you should be alright. But check it again after driving it awhile for any coolant lose

If it does overheat again you need to find the problem and take care of it now. Don't just keep adding water. It could be a water pump going bad or a stuck thermostat. These are all much cheaper then what could happen if you wait.
Good luck.

Sounds like the oil may have been too low and the engine became starved for oil causing excessive friction and the engine overheated as a result. You MUST ALWAYS have enough oil in it and change it and the filter regularly as it is the life of the engine. I hope you did not drive it or run the engine long with it overheated as engine damage can occur. Hopefully you added oil soon enough. Also, though, do not overfill the engine with oil as that can be just as bad as not enough. What happens with it being too full is the the crankshaft and engine parts then dip into the oil with every revolution...maybe 3000 or more times per minute. This makes it like an egg beater and turns the oil into a froth of bubbles and oil that the oil pump can not pump to vital parts and the engine will overheat and even burn up even though the engine is full....over full that is...of oil...so maintain the correct levels as looked at on the dipstick at all times. If you ever see it below those levels stop immediately and do not drive until adding oil.
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