No thermostat

[single]

New engine thermostat won't turn up in time so apart from bad fuel economy and not so good for the donk is there any reason why i shouldn't leave it out for a few hours running time?

 

[tinkicker0]

Because depending on the config of your cooling system it may cause your motor to overheat. Or not.

VERY bad idea for a number of reasons.

 

[single]

Because depending on the config of your cooling system it may cause your motor to overheat. Or not.

VERY bad idea for a number of reasons.

How?

 

[tinkicker0]

Because coolant may well just circulate round the block rather than through the heat exchanger or down the exhaust.....depending on config.

 

[single]

Because depending on the config of your cooling system it may cause your motor to overheat. Or not.

VERY bad idea for a number of reasons.

Oh- i see.The fresh water won't be in the heat exchanger long enough to cool?

 

[Lakesailor]

It depends on the design as Tinkicker says. If you took the thermostat out on an "A" series engine you would likely have hot spots created in the cylinder head. The back-pressure caused by the restriction increased the swirl through the head casting.
You wouldn't notice on some low powered units and it wouldn't show on your temp gauge either.

With problem motors sometimes taking the valve off the thermostat but putting the flange back in worked.

 

[vyv_cox]

The thermostats on Bukh and Volvo seawater cooled engines operate in a way that is quite different from those in a car, or in indirectly cooled engines. Water from the pump divides, either to circulate through the engine or through the bypass. The thermostat works as a diverter valve, opening one flow and closing the other. The bypass is probably the easier path, so without a thermostat the majority of water would go that way, with little or no differential pressure to drive it around the engine. The engine could overheat badly, which is likely to deposit calcium salts in the coolant passages.

If your engine is indirectly cooled you should get away with it but not a good idea for an extended period.

 

[single]

Thanks, i won't risk it, not really in the mood for spending another 7k on a fried engine for the sake of a boxing day cruise.
Other thing i cant remember is which way it was fitted? Spring facing up or down.(Thornycroft T95)

 

[tinkicker0]

Spring and wax chamber usually towards the engine.

 

[single]

Thought so.
New plan is nip to motorfactors and get one but tried last week and they wanted vehicle make/model so any ideas which vehicle/machine uses the Mitsubishi 1.5 diesel (thornycroft t95) thermostat.

 

[theoldsalt]

My Thornycroft T80 is similar to your T95 both Mitsubishi based engines.
The T80 is 1300cc and the T95 is 1500cc.

If your T95 is indirect cooled then the thermostats are probably very similar, if not the same.

The thermostat part number for my T80 is Mitsubishi K6516441 the Bauer equivalent is 26AHD0240

You may find further equivalents via google or your motor factors supplier may have a table of equivalents.

I hope this helps

 

[VicS]

Thought so.
New plan is nip to motorfactors and get one but tried last week and they wanted vehicle make/model so any ideas which vehicle/machine uses the Mitsubishi 1.5 diesel (thornycroft t95) thermostat.

The one in your picture is a bog standard type without an additional flap for controlling an internal bypass flow in the way Vyv Cox describes.

There is one on my garage shelf that would probably fit but it is an 88°C one

 

[tinkicker0]

Impossible to tell from the pic I'm afraid. Some use the wax chamber bottom to close off a port without the usual round plate.

 

[Jcorstorphine]

Thought so.
New plan is nip to motorfactors and get one but tried last week and they wanted vehicle make/model so any ideas which vehicle/machine uses the Mitsubishi 1.5 diesel (thornycroft t95) thermostat.

I am sure your engine is indirectly cooled so the freshwater circulation will be the same as a car engine. you could just jam old one open and refit, that should give the right circulation but will run a bit cool.


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[single]

Thought of doing that but then risk foreign object damage

 

[Lakesailor]

(It seems to be the L4S engine which is used in diggers and forklifts.
opens at 82°C)

 

[ripvan1]

that should give the right circulation but will run a bit cool.

Is running a bit cool a problem ? - reason I ask is that on my petrol watermota sea wolf pre X flow t/stat has been removed and engine seems always to stay cool to the touch - is this ok?

Thanks

 

[single]

that should give the right circulation but will run a bit cool.

Is running a bit cool a problem ? - reason I ask is that on my petrol watermota sea wolf pre X flow t/stat has been removed and engine seems always to stay cool to the touch - is this ok?

Thanks

Cheers Phil, where did you find that info.Something to go on now for future ref.
Ref temp. the research i have done just means running cool causes more wear and worse fuel consumption.