Most thermostats I've purchased over the years have had a hole about 3mm dia in the hem to, I assume, help bleed the system. Some have had a nylon jiggler in the hole.
I have had a small overheating issue with my 300TDI. I have heard that drilling two 1/8” holes in the hem (top and bottom) of the thermostat allows air to pass through these holes and a small amount of fluid. I Googled the procedure, but anyone can make a YouTube video.
Interested to hear if anyone has tried this modification on a tdi thermostat?
Most thermostats I've purchased over the years have had a hole about 3mm dia in the hem to, I assume, help bleed the system. Some have had a nylon jiggler in the hole.
Ron B.
VK2OTC
2003 L322 Range Rover Vogue 4.4 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA
RIP Bucko - Riding on Forever
Also, I am interested to know the affect of having the aircon on going up steep inclines and its relationship to overheating. Is it the extra pulley work on the motor or is it the condenser that is trying to cool the hot air coming from air conditioning compressor that is interfering with cooling the radiator, as the air has to move through the condenser before reaching the radiator. I also wonder what percentage of air those condensers actually block.
I’d say you have other issues......I’d be leaving the thermostat alone
Why is it so?
To be honest Rangieman, I thought it was a fair question. I have read on this AULRO site about turning off air conditioning when the motor is getting hot. Just wanted to know the science behind it. Perhaps someone will tell me.
Yes it's because of the increased load of the engine and extra heat from the condenser, generally you overheat because your condenser fan isn't working cooling the condenser while idle in traffic. You can get away with it on the freeway if your viscous is working and it's not too hot out.
Cheers Jim
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