Engine Temp

The Great Pretender · Post by **The Great Pretender** » Fri Feb 15, 2008 12:38 am

[quote="brorabongo"]I could be wrong, but I though I was measuring the head.

But why? what are u measuring?

brorabongo · Post by **brorabongo** » Fri Feb 15, 2008 1:11 am

The Great Pretender wrote:
brorabongo wrote:I could be wrong, but I though I was measuring the head.
But why? what are u measuring?

I am measuring the temperature at that point of the head, and I now know what the temperature is normally, in that area. If I see a difference in readings, as in higher ones, I would assume that something is not quite right, and is worth investigating. I realise, at the end of the day, I could stick it just about anywhere, but the hole it's in, was crying out for a probe!!

I did ask, as soon as I received the device, where I should stick it? ( and I mentioned, no answers for where the temp will read 37 degs.

)

Have you got any better ideas TGP? as I would genuinely be greatfull for them.
Cheers.

The Great Pretender · Post by **The Great Pretender** » Fri Feb 15, 2008 1:34 am

The water temp leaving the head is the most important place to read engine temp IMHO.

brorabongo · Post by **brorabongo** » Fri Feb 15, 2008 2:00 am

The Great Pretender wrote:The water temp leaving the head is the most important place to read engine temp IMHO.

cool.....Right which hose would that be then?

The Great Pretender · Post by **The Great Pretender** » Fri Feb 15, 2008 2:05 am

Top RHS of engine drivers side unless im mistaken

brorabongo · Post by **brorabongo** » Fri Feb 15, 2008 2:06 am

Noted, cheers.

The Great Pretender · Post by **The Great Pretender** » Fri Feb 15, 2008 2:10 am

brorabongo wrote:Noted, cheers.

let me know what it reads.

haydn callow · Post by **haydn callow** » Fri Feb 15, 2008 11:50 am

Extract from the TM2 instructions.
If you want to measure the head temp...put the sensor under a tappet cover bolt.
If you want to measure coolant temp ...put the sensor under a thermostat houseing bolt.

haydn callow · Post by **haydn callow** » Fri Feb 15, 2008 12:26 pm

I suppose the risk in putting the sensor under a stat housing bolt is that whilst your busy keeping a eye on that the head could be overheating. At least if the sensor is under a head bolt it will read that temp no matter what the coolant is doing and weather there is a airlock or not.
This is where I have mine and it's staying there.
The coolant temp is not always a indication of head temp.

The Great Pretender · Post by **The Great Pretender** » Fri Feb 15, 2008 11:19 pm

What side of the head are you monitoring H C? and what temp is considered a problem?

haydn callow · Post by **haydn callow** » Sat Feb 16, 2008 9:56 am

The inlet side, under a tappet cover bolt, 2nd from the front.
Best way to set the temp to set off the alarm is to just drive around for a few days ubder all conditions and note the max your temp goes up to. Then set the alarm to go off 2 or 3 degrees above the max it has ever been. The actual temp reading is not relevant. what you are after, is any reading that is above normal.

The Great Pretender · Post by **The Great Pretender** » Sat Feb 16, 2008 11:20 pm

Sorry haydn, just noticed I asked you to repeat yourself

Anything that helps save the engine has to be worthwhile.
Fitting it at the thermostat is the wrong place isnt it as that is the 'cold' side of the radiator?
Im (when I get time) going to fit a temp gauge to the outlet of the engine, and also fit a thermostat there, but thats another story. The water leaving the head is the hottest it will get and if there is a problem the temp will rise there first.
IMHO and from what I have read, is that problems arise and the head gets stressed when the water is allowed to boil around the exhaust valves and steam pockets can form.
If I was going to sense the temp from the cyl head I would do it from the nearest point that I could get to an exhaust valve as this is the starting point of any problem and the temp would start transfering across the head from there.

Big Rich · Post by **Big Rich** » Sun Feb 17, 2008 12:04 am

Hi i just kept the TM2 away from the exhaust manifold best on other side of engine, mine is located on long bolt on waterpump/ head point, Temp sits around 85 Deg highest noted ..102 then fans kick in and pulls it back down from the brink!! max is set to 104 Deg I have just fitted a full set of silicone hoses and flushed the system through, also i have Just ordered 2 mtrs of flexable silicone hose and 2 compact 90 Deg fittings to do the rear heater matrix, and a few short hoses near the turbo ...then i should be ok ....prob now the rad will spring a leak.....hi...hi Rich