The original thermostat is not "slow to open" it appears to open too early with age or fails to shut properly allowing premature flow of the heated water.
If you are seeing a reading of less than 88C then the Radiator has nothing to do with it as there should be no warm water flowing through it! If you have the air con on Auto then the fan is on and blowing cold air on to the cylinder
block but it is very difficult to prevent that. I have experimented with a higher rated Stat' and my diesel went as high as 98C on a long slog uphill
and fell immediately the stat opened (in summer). The uprated Stat was a
Stant 13352 (205F--96.1C) not suitable for the in-hose fitting as it is a normal sized unit for a housing. The only time you will get your diesel to a high temperature is when it is under a heavy load, just watch the reading drop on the OBD when you go down a hill!
Last edited by wuzerk; 6th January 2016 at 11:52..
|