[Scottrgrewe]

My engine is on the verge of overheating, so I pulled the thermostat and tested it in hot water on the stove. Its meant to open at 74c and it doesnt really start to open until about 85c- So looking to replace. Im in Chiapas Mexico, they are 3 autozones here, and they have lots of thermostats, but obviously not my specific one. They have ones that are very similiar, but after spending an hour entering different cars into their system looking for 74c thermostat they get pretty irritated. Ive been scouring the internet for several hours, and also cant seem to find a way to search for a car that would use the same one or at least something that would work. Am I missing something?
I did find some exact replacements but are expensive and will take over a month to ship here..
Sierra 183658
Volvo 877349
there must be a var make model and year that uses at least a similiar thermostat i can ask then for right?!

 

[SanderO]

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Volvo Penta - Thermostats - Marine Parts & Accessories - Products

www.michiganmotorz.com

 

[Rockter]

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www.michiganmotorz.com

In salt water you must use the lower rated thermostat. If you cant source the correct thermostat and you are running hot, take out the existing thermostat and saw off the central mechanism so that you leave only the big hole in the centre of the thermostat "disc". Fit the disc back in the housing. Thereafter you will run cool but that is much better than running hot. If you run hot in salt water the motor will scale up and will bridge one of the coolant entry points to the cylinder heads and then it will REALLY run hot. Believe me. I've been there with that one on my MD17c.
Rockter

 

[Rockter]

If the coolant entry points scale over (or almost over), the engine will run so hot that you will hear it boiling after shut down. You will have to take off the exhaust manifold and use a screwdriver to clear the scale from the coolant entry ports. A word of warning- you MUST use original Volvo exhaust gaskets when you reassemble! They are the ones with the copper surrounds. Do not use aftermarket exhaust gaskets especially those that look like compressed wire mesh. Don't. They almost cost me the motor when they corroded.
I would even use the old gaskets before I would risk those mesh-like gaskets again.

 

[willywaw]

My engine is on the verge of overheating, so I pulled the thermostat and tested it in hot water on the stove. Its meant to open at 74c and it doesnt really start to open until about 85c- So looking to replace. Im in Chiapas Mexico, they are 3 autozones here, and they have lots of thermostats, but obviously not my specific one. They have ones that are very similiar, but after spending an hour entering different cars into their system looking for 74c thermostat they get pretty irritated. Ive been scouring the internet for several hours, and also cant seem to find a way to search for a car that would use the same one or at least something that would work. Am I missing something?
I did find some exact replacements but are expensive and will take over a month to ship here..
Sierra 183658
Volvo 877349
there must be a var make model and year that uses at least a similiar thermostat i can ask then for right?!

So, are you raw water cooled?
That's only 165F, very cold for diesels, and appropriate for raw water cooled engines.
Gas or diesel.?
If you overheat, at its age, its clogged up or the flow is slow, impeller or pump old.
Or thin cylinder walls, scaled up passages.
You might consider treating it with Calicum removers.