Well, considering I just bought this one, I would rather wait a bit and get one later. It was 21f outside this morning, and I already had heat in about 3 min idling. I just went fron no tstat to this one. I replaced it Sunday, and did not have the time to wait for delivery.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

That is a tad too hot.

I check the temp gauges by getting a reading at the sensor (or T stat housing) with one of those little infa red remote gizmos. Its a cheepo from Costco but it seems too work. Old way.. if you can hold the upper radiator for more than a couple seconds, its not too hot. Wouldn't count on the accuracy of that one tho.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Well, with the old 80C stat, my car took about 10-15 minutes of running (city sreets) in San Francisco climate (say average is 60F) to get to 175 F (79.4C).
Likewise, on a hot day on the freeway it would run at around 212F (100C).

BUT now with the 92C stat, the engine temp rises faster to 175F and beyond. After much city driving it settles at around , what seems like 230F (110C).

My main concern is with the implications. I don't think it will overheat (50-50 mix coolant) but I wonder if it may affect the water pump or worse the head gasket. I also wonder whether it may cause engine oil to breakdown faster but this is academic because I change oil every 1500 miles on average.

So is head gasket something which may be affected by higher running temp??

I imagine that the Diesel engine itself can take high running temps and to some degree benefits from higher temps especiall because 90% of that car's use is city driving and short trips.

Comments??

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1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

Stevo, you are correct.

I had to buy an 80C thermostat from the dealer and bring it to the mechanic to replace. Now it is normal.
Although the old one was 80C, and was stuck a bit open, the mech insisted on the 92C one, blah blah blah.
Wrong!

Normally the guy is great but lately his screwed up family life has taken its toll.

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1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

Sounds like a good time to get the manual and start twisting wrenchs

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Yeah, I have the manuals and cds and wrenches. I do what I can on my own.

I brought it to him to figure out an alectrical drain which I had 99% tested out. (my lack of experience to get the final 1%)

He noticed the therm was not right.
He was correct on that but stubbornly installed a 92C therm even after I pointed out that it needed an 80C.

I do what I can on my own.
When I can !!

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD