Thermostat

[Gavin Waddell 18]

Was talking to a mechanic mate and he used to leave the thermostat out on his r5. has anyone else done this? i was going to do it on my engine, for the main reason of not having to wait to bleed the air out.

[welshpug 1,657]

not ideal, the engine would be running below optimum temp for too long IMO.

[DamirGTI 342]

No ... bad idea i wouldn't do that ..

Anyway if the high coolant temp. is the problem or if you want the engine to operate at a lower coolant temp fit lower temp. thermostat like instead of 88deg. one fit 82deg. thermostat .. i believe that theres even lower stage thermostat below 80deg. for use in race engines however in ordinary car parts store you'll usually find 88deg. (or 89) and 82deg. thermostat ..

 

Regards !

Damir

[VisaGTi16v 1]

Turbo engines probably run hotter though especially ones from the 1920's like the R5 engine heh. Just run a lower stat, you can get some in the 70's ive heard mentioned on here. A number of rally drivers I know leave theirs out but thats due to the nature of the events

[C_W 3 1 Cars]

The thermostat is closed until it gets to a certain temperature so once it's above that and open, the water flows around the engine almost [but not quite as free flowing as] running without one. There may have been something wrong with his car but either way running without a thermostat often just delays the inevitable (ie if it's going to over heat then it will, but it will just take longer without one!). And in colder weather running without it will mean it won't warm up at all and the heater wouldn't work very well either if the cooling system is good working order.

 

I've got a 72degree thermostat in mine and this is prob the lowest you can get - runs fine with this (from Skip Brown Cars; it's a Peugeot thermostat that is modified so it's probably available from Peugeot but I couldn't tell you what engine it's from).

[jonnie205 1]

You need the thermostat left in but cut the centre out of it. The thermostat is required to agitate the water as it flows around the system. You also need the stat outer casing part to support the gasket. On the 205 and206 rally car we just snip thye two supports off the stat and put outer ring in there and it works a treat

[VisaGTi16v 1]

Thats exactly what I used to do in mine Jonnie, centre cut out but I found when cruising to events on the road and especially when cold, ie early starts, the engine was to cold for my liking. They shouldnt be run at low temps, 60C or whatever not to mention using more fuel as the ecu will think its cold the whole time and chuck in more

[cybernck 402 1 Cars]

i was thinking about taking the thermostat out of my rear engine,

as the coolant will already be warm when i start the rear engine,

unless i'm starting them both up from cold.

[fletch 0]

i was thinking about taking the thermostat out of my rear engine,

as the coolant will already be warm when i start the rear engine,

unless i'm starting them both up from cold.

 

Ha! You're not exactly running a typical car though!

[Rob_the_Sparky 9]

Many on here just don't bother bleeding air from the stat (cause the bleed screw is broken on many cars) with no ill effects. No way I'd remove a stat for that.

[pug_ham 244 3 Cars]

I've got a 75' stat in mine which I got from my local motor factors for under £10 with new seals. It was listed int he Peugeot section of his book, just heck the diamensions of the stat to see if it'll fit.

 

I wouldn't run without a thermostat for reasons stated above.

 

Bleeding the air out of the system on a 205 isn't usually that hard to do. Even with a snapped bleed screw on the thermostat housing I just remove the pipe from that T piece until water flows out but mine runs straight from there to the expansion tank.

 

Graham.