In a previous thread I wondered if the heater matrix had gone on my Jap NA as I was getting no heating but it started working again the next day.

 

Though today I had an over heating problem I think?

 

I was driving back from work about 10-15 mins (not pushing it) and noticed just as I was getting home the temp reading was high & then went to max. Pulled up & popped bonnet - fan on radiator was going, and could hear what sound like air escaping from the raditor cap valve, also could hear a sound like some water was bubbling near the radiator in a pipe low down? - could not place it exactly...

 

I assume I have some sort of problem & not just a dodgy sensor on the dash (like i have a dodgy oil pressure reading on the dash - reads all sorts of values from 0+)

 

I have managed to sort the acceleration problem (sort of!) i found an air hose in 2 bits on the side of the engine block. The hose is really tiny but eventually managed to find a braided fuel hose that was small enough from a local car parts dealer... seems to be stay on but was fiddle to fit...

 

Any ideas with my over heating problem?? Not had any other signs about the heater matrix going...

 

Thanks

 

Barry

sounds more like an air lock m8

 

found this thread which will probably answer all that;)

 

 

http://www.300zx.co.uk/forums/showthread.php?t=36939&highlight=air+lock

Did you check the coolant level? if you have lost water this can make the boiling/bubbling noise.If the level is low-u got a leak! ;)

sounds like an air lock to me too - thats the bubbling sound generally

air lock could also cause the hissing sound, as the air escapes through the cap spring into the expansion tank.

I am going to have a go at the radiator this weekend - if it is an airlock!

 

Someone else has suggested the thermostat might be playing up.

 

The car is not overheating all the time - it has gone 3 days now & ok...

 

Where is the thermostat, does it cost much to replace it??

 

Cheers

 

Barry