In the process of removing t-stat housing. Do I have to remove any fuel hardlines to get the housing out? Looks pretty tight. I'm in the middle of it, but don't want to pull the 2 bolts yet if I have to take out fuel lines. thanks

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1990 300D 2.5
1991 F350 7.3 Dually IDI

1997 F350 gasser dump
1980 H-D 93 inch Shovel
2000 SE Roadglide

Careful. I don't think thats your t-stat house you are looking at.

The t-stat is down on the passenger side of the block. There are no fuel lines there.

See pic... under the exhaust manifold.

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I'll get a pic and post in a minute...

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1990 300D 2.5
1991 F350 7.3 Dually IDI

1997 F350 gasser dump
1980 H-D 93 inch Shovel
2000 SE Roadglide

I've never worked on a car that has it's t-stat on the side of the motor. Always on the front of the block. The third pic is the side of the motor. Wouldn't you lose most of your coolant if it's down there? That is, when you have to do a replacement.

Attached Thumbnails

     

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1990 300D 2.5
1991 F350 7.3 Dually IDI

1997 F350 gasser dump
1980 H-D 93 inch Shovel
2000 SE Roadglide

Third pic shows the t-stat house. I promise. And, yes... you will lose most of your coolant if you do not drain it first.


That house on top of the head is empty. It's just a dummy to capture air / create a high point on the engine and mate the head design with the radiator.

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thanks for the help. I was ready to pull the damn thing. First time for a thermostat on a MB for me, obviously.

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1990 300D 2.5
1991 F350 7.3 Dually IDI

1997 F350 gasser dump
1980 H-D 93 inch Shovel
2000 SE Roadglide

Diesel Giant's pictorial may be of help.

http://dieselgiant.com/thermostatreplacementandmodif.htm

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

All done, have heat now. The thermostat was stuck open. Thanks everyone. While I was underneath, found another problem- the IP is leaking from the bottom plate, or the side plate on the engine side. Either way, oil drip. Never ending fun.

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1990 300D 2.5
1991 F350 7.3 Dually IDI

1997 F350 gasser dump
1980 H-D 93 inch Shovel
2000 SE Roadglide

You might be able to tighten up the screws without replacing the seal on the IP.

Its worth a shot before a very messy / involved task.


Get a 90* bent flathead or use a flathead drill bit in a small wrench to reach them.

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