Diesel thermostat definative answer

[sof007]

Originally Posted by wuzerk

My set-up has been in use the longest, Meziere housing and Chevy 'stat, and the temperature readings in the recent near 90F hot spell have not altered at all. Still a max of 93C. After the successful test period I installed the British made system in my sons car and recently discovered that the housing was weeping. This was simply due to the hose clips having bedded in and needing quite a lot of tightening so don't forget to check yours after a couple of months.

Where can you get this stat? I've tried the fiesta stat (QTH102 i think or something like that) but it ran too hot. It would get up to 100+ and then I'd have to back off. I then put a rivet in the original inline stat that came with the SC housing and that ran perfectly for a while but it appears to have dropped off again. I'm not sure why but i suspect that maybe the rivet has gone through the hole or else the stat has failed.

Anyway, long story short I need a new inline stat. Where's the best place to buy a chevy stat or similar and how much should I be expecting to pay?

Oh btw, prior to installing the inline stat, the car was running at approximatley 67-68 with an average of 40mpg. When I installed the 92degree stat this went up to 47mpg but I thought the temperatures were a bit too variable. When I installed the original SC stat (88degree i think, with the hole blocked) i got around 45mpg. I"m back down to 41-42mpg with the running temp falling again to 75max. These figures were all done by brim to brim calcs. Although i can't say that they were over the same driving conditions (ie doing a lot of motorway at the moment so mpg would be less anyway) they were an average over a decent amount of miles (2000+ each). Just though i'd share the knowledge.

[rossocorsa]

I run with a 91c stat no hole and no issues I think it is possible to get paranoid about watching the obd, car manufacturers damp the water temp reading for good reasons I reckon if your temp gauge never moves above the middle it is fine whilst 100 is boiling point in free air it doesn't have that much relevance in a pressurised system, don't most modern petrol engines run at least that hot?

[Arctic]

Originally Posted by chrislloydie

I used a cheap dremel type rotary tool which only cost £15 from halfords and came with a load of attachments. It's labelled as a craft tool set but it managed to cut through the metal band on my top hose. Took about 2 minutes with taking care not to damage the actual hose itself.

Hi Chris
Just what i intend to you you know it makes sense



boys and there toys what would we do with out them Arctic

[Arctic]

Originally Posted by sof007

Where can you get this stat? I've tried the fiesta stat (QTH102 i think or something like that) but it ran too hot. It would get up to 100+ and then I'd have to back off. I then put a rivet in the original inline stat that came with the SC housing and that ran perfectly for a while but it appears to have dropped off again. I'm not sure why but i suspect that maybe the rivet has gone through the hole or else the stat has failed.

Anyway, long story short I need a new inline stat. Where's the best place to buy a chevy stat or similar and how much should I be expecting to pay?

https://www.ebay.co.uk/itm/TH01489-G...4AAOSwgxpffKqD



https://www.ebay.co.uk/itm/GATES-TH0...AAAOSw~dxfbKTO
Arctic

[sof007]

Originally Posted by rossocorsa

I run with a 91c stat no hole and no issues I think it is possible to get paranoid about watching the obd, car manufacturers damp the water temp reading for good reasons I reckon if your temp gauge never moves above the middle it is fine whilst 100 is boiling point in free air it doesn't have that much relevance in a pressurised system, don't most modern petrol engines run at least that hot?

This is true. I have noticed that the new 2.0 diesel VW engine runs at approx 102-104 however, as has been mentioned in this thread a few times, my worry would be the drop in temperature after the stat opens. I don't think it's as dramatic as the OBD shows but it's still a consideration.

[sof007]

Originally Posted by Arctic

http://www.rockauto.com/catalog/moreinfo.php?pk=1862100
£9.96
Arctic

Cheers arctic, ordered and on the way.

I don't suppose anyone knows what size the O-Ring in the SC housing is? I damaged mine when changing the stat last time and I'd like to be able to get one before I open it.

[Arctic]

The stat arrived this morning from gates my order was placed on August 12th 2011 at 04.58am and arrived today 15/08/2011 8.15pm fast service.

I note from the paper work that the Gates Thermostat TH01489 came from here below just incase this helps anyone.
RockAuto,LLC
Unit 1 Foremost Industrial Estate
Grange Mill Lane
Sheffield,
South Yorkshire
S9 1HW

[email protected]
http://www.rockauto.com

This is the thermostat that arrived today
1

2

Now my question is which way does this face the engine or which end is inserted into the hose first dot 1 or dot 2 in the photo below
3

Thank you in advance for your help Arctic

[BigRuss]

The wider part is the bit that pushes into the hose, the thin part toward the engine.

You don't have to push it in too far, push it completely inside the hose with the thin part of the bulb about 10mm inside the end.

It doesn't need securing, just make sure it sits centrally within the hose.

Russ

[Arctic]

Originally Posted by BigRuss

The wider part is the bit that pushes into the hose, the thin part toward the engine.

You don't have to push it in too far, push it completely inside the hose with the thin part of the bulb about 10mm inside the end.

It doesn't need securing, just make sure it sits centrally within the hose.

Russ

Thank you Russ.
most appreciated will do this sometime later today or this week as i have got the car in for her MOT today at 2.00pm fingers crossed. Arctic

[Arctic]

I can not work this out today when i had to take the car for it,s MOT i gave it a good old Italian tune up first on the M54 10 miles i all then onto the test which she passed no advisories it stood for about 10mins waiting to be tested then was running during the test say 30mins when i wa given the car back drove turned engine off put OBC on 19 then 7 let it read 77 let it tick over for say another 10-15mins it climbed to 86 in about 7mins then onto 96 eventualy i turned her off so the stat must be working ok right if so i would not need to use the gates themostat i bought would i Arctic