Independent Renault Forums banner

1 - 3 of 3 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter #1 (Edited)
Got a strange one that at present doesn't present me any problems but invite any relevant input. The heater on my wife's PH.1 Clio 1.2 RN wasn't too good when we bought it several months ago, anyway back-flushed and all was good.....for a while, until once again isn't too warm. The curious thing is though, firstly, I've never heard the fan running (as the temp.has never reached that point) and tested it just to make sure (it was OK!), and, secondly the pressure in the expansion tank is never high and the cap can be released after running without the usual output of steam/ water. Noticed a small hissing today from the cap which looks like the weak point...but, my point is- is this a problem ? If the engine's staying cool enough (even at idle) and coolant level shows no significant loss....and could it be part of the heater problem also?

Forgot to mention... the thermostat was replaced and the engine temp. reaches half-way point within a few miles !
 

·
Premium Member
Joined
·
40,429 Posts
In theory,if the cap was leaking,this would lead to the car over-heating much more readily.The cap holds a certain amount of pressure in the system so the boiling point of the coolant is raised.If the caps leaking,then the pressure can't build up and it'll over heat.

It does sound as though the heater matrix is partially blocked,which as Otto quite rightly says,is a common problem,but as long as the temperature stays constant,I'd not worry too unduely about anything else.Replace the cap,flush the complete coolant system through,and bleed the system and go from there.:)
 
1 - 3 of 3 Posts
Top