engine overheating

[sailtech]

running without a thermostat

If heating the interior is not an issue, what's the downside of running without a thermostat?

Thanks

[scott]

If heating the interior is not an issue, what's the downside of running without a thermostat?

Thanks

slow warm up. inability to reach optimal running temp

[Santana]

What is Hot?

In stop and go traffic my truck can get up to 185F, almost 190F. I have a smiths gauge which is something that I recommend for everyone running a series truck.

So my question is what is considered hot or overheated?

I think that 168F is considered the running temp for a series.

[nicklediemme]

I am new to Rovers, so take this for what it is...You asked earlier about too lean....yes it can cause overheating and the burning of your valves. Jetting and carb adjustments are critical as is the timing obviously.
Most car cooling sytems have a weep hole in the T-stat that needs to be installed with the hole located at the highest point in the T-stat housing. If installed wrong can cause issues, like not being able to get the air bubles out of the system. Water pump impellers can also slip on some shafts causing lack of water flow. Like I said......I am not a Rover guru and most likely one of the old timers would of mentioned this already if it was a common issue. I just thought I would throw it out there.

[robert wood]

In forty years of driving 2.25s I've never seen an air blockage that caused overheating. All else having been done I'd be looking at a leaking head gasket or a crack in the head. Was it a copper gasket of a fibre one?

Ray

[ErikP]

In forty years of driving 2.25s I've never seen an air blockage that caused overheating. All else having been done I'd be looking at a leaking head gasket or a crack in the head. Was it a copper gasket of a fibre one?

Ray

i dont remember what i put for a head gasket. long time ago. all i know is that the engine has been running red line ever since i finished the rebuild a year ago. i revs did not get the water pump to prime. taking the thermostat out didnt do anything either (didnt try high revs in this state). so I put a hose to the rad while the engine was running. up until that time i couldnt get flow out of the top hose. now the flow is good and the engine is cool. had to have been air trap in my book. no white smoke in the exhaust and no bubbles in the rad by the way.

[txffjim]

air bubble

if your thermostat doesn't have one stock, try drilling a small 1/8" hole through it so air can escape to the radiator, keeping a bubble at bay.