Diesel thermostat definative answer - Page 13

sof007 · 26th October 2010, 12:17

Good to hear Jules.

wuzerk · 26th October 2010, 13:34

JULES, brilliant! I was a bit worried that the mod would lose you a lot of customers but now they will have the choice when they visit for buscuits!

Thomas · 26th October 2010, 21:50

hmm interesting ! I was about to order a bog standard stat from you Jules but I think I shall hang fire, no point in doing things the hard way is there!

Datadogie · 27th October 2010, 09:23

About this little hole. Don't you need a little water flow inorder for the heat to reach the thermostat. ie if you have a long pipe full of water and only heated one end how long would it take for the other end to get hot. If the thermostat were at this end it might not open at the desired engine (block) time. But if there was a slow flow of water the other end would heat faster.

wuzerk · 27th October 2010, 09:39

My initial thought when starting the experiment was that there had to be a by-pass hole in the new 'stat to prevent an air lock and to enable the hot water to reach the unit to cause it to open. I tried various sizes of holes but then discovered that there is a well hidden small hole in the Chevvy one.
No further holes have proved necessary. I have had no problems with my installation which was allowing a maximum of 74C with the old stat and now runs between 87C and 93C depending on engine load. The warm up time is not radically improved since the diesel struggles to reach temperature in the cold weather anyway but I now have warm feet which I certainly didn't have before.

rossocorsa · 27th October 2010, 09:51

Quote:

Originally Posted by Datadogie

About this little hole. Don't you need a little water flow inorder for the heat to reach the thermostat. ie if you have a long pipe full of water and only heated one end how long would it take for the other end to get hot. If the thermostat were at this end it might not open at the desired engine (block) time. But if there was a slow flow of water the other end would heat faster.

if you look at the engine cooling diagram you'll see that the heater will act as a suitable bypass

calibrax · 27th October 2010, 09:57

As mine is running at an average of about 74c, I'll definitely be buying one of these. It looks like a straightforward mod which I'd be able to do myself... I'd certainly never attempt changing the OEM stat! if I lived closer to Jules I would have had it done by him already, but it's just too far away.

Once these go on sale I'll be first in the queue

chrishumphries · 27th October 2010, 19:43

Superb mod Wuzerk, congratulations ! Could you put me down for a kit please Jules, my CDTI is running at 74c !

Jakg · 27th October 2010, 19:58

PLEASE make a proper how-to for this... would love to do it but not overly confident

Tam · 27th October 2010, 21:02

Been following all these thermostat threads for a year or so and have a brand new one in a box i bought last winter waiting to be fitted. This seems to be what everyone has been looking for and makes much more sense than fitting another doomed to failure stat. so waiting with interest and should be worth the extra expense

26th October 2010, 12:17	#121
sof007 Avid contributor MG ZT Join Date: Aug 2010 Location: Galway Posts: 194 Thanks: 0 Thanked 1 Time in 1 Post	Good to hear Jules. __________________ MG ZT CDTi 135+ Trophy Blue 131,000 and rising

26th October 2010, 13:34	#122
wuzerk Passed Away Rover 75 CDT 03 auto Conn. SE Join Date: May 2009 Location: London Posts: 2,885 Thanks: 104 Thanked 254 Times in 204 Posts	Bulk buy JULES, brilliant! I was a bit worried that the mod would lose you a lot of customers but now they will have the choice when they visit for buscuits!

27th October 2010, 09:39	#125
wuzerk Passed Away Rover 75 CDT 03 auto Conn. SE Join Date: May 2009 Location: London Posts: 2,885 Thanks: 104 Thanked 254 Times in 204 Posts	Hole My initial thought when starting the experiment was that there had to be a by-pass hole in the new 'stat to prevent an air lock and to enable the hot water to reach the unit to cause it to open. I tried various sizes of holes but then discovered that there is a well hidden small hole in the Chevvy one. No further holes have proved necessary. I have had no problems with my installation which was allowing a maximum of 74C with the old stat and now runs between 87C and 93C depending on engine load. The warm up time is not radically improved since the diesel struggles to reach temperature in the cold weather anyway but I now have warm feet which I certainly didn't have before. Last edited by wuzerk; 27th October 2010 at 09:42..

27th October 2010, 09:57	#127
calibrax Posted a thing or two BMW 4 Series Join Date: Nov 2008 Location: Rochester, Kent Posts: 1,975 Thanks: 29 Thanked 37 Times in 28 Posts	As mine is running at an average of about 74c, I'll definitely be buying one of these. It looks like a straightforward mod which I'd be able to do myself... I'd certainly never attempt changing the OEM stat! if I lived closer to Jules I would have had it done by him already, but it's just too far away. Once these go on sale I'll be first in the queue __________________ Steve 2004 MG ZT+ CDTi 160 (sadly now gone!) 2015 BMW 435d GranCoupe XDrive

27th October 2010, 21:02	#130
Tam Posted a thing or two 05 ZT+, 04 ZT+, 64 P6 2.0, 74 P6 V8s, 75 P6 V8, 92 214Si, 04 25 Td, 02 Defend , 05 ZR 105+ x2 Join Date: Dec 2008 Location: Kirriemuir Posts: 1,319 Thanks: 701 Thanked 203 Times in 136 Posts	Been following all these thermostat threads for a year or so and have a brand new one in a box i bought last winter waiting to be fitted. This seems to be what everyone has been looking for and makes much more sense than fitting another doomed to failure stat. so waiting with interest and should be worth the extra expense __________________ Lagoon, last one built! And Horizon 1 of only 2!....MY CARS

26th October 2010, 21:50	#123
Thomas This is my second home MG6 1.8T GT SE Join Date: Mar 2009 Location: Falkirk Posts: 9,510 Thanks: 106 Thanked 173 Times in 128 Posts	hmm interesting ! I was about to order a bog standard stat from you Jules but I think I shall hang fire, no point in doing things the hard way is there!

27th October 2010, 09:23	#124
Datadogie Avid contributor Rover 75 CONNOISSEUR SE CDTi AUTO Join Date: Nov 2009 Location: Aberdeen Posts: 170 Thanks: 1 Thanked 0 Times in 0 Posts	About this little hole. Don't you need a little water flow inorder for the heat to reach the thermostat. ie if you have a long pipe full of water and only heated one end how long would it take for the other end to get hot. If the thermostat were at this end it might not open at the desired engine (block) time. But if there was a slow flow of water the other end would heat faster.

27th October 2010, 19:43	#128
chrishumphries Gets stuck in Rover 75 connoisseur CDTI TOUR & ZTT+ CDTi Tourer - both in rare starlight silver Join Date: Jul 2010 Location: Gloucester Posts: 666 Thanks: 48 Thanked 42 Times in 39 Posts	Superb mod Wuzerk, congratulations ! Could you put me down for a kit please Jules, my CDTI is running at 74c !

27th October 2010, 19:58	#129
Jakg This is my second home N/A Join Date: Feb 2010 Location: Suffolk Posts: 6,867 Thanks: 0 Thanked 397 Times in 302 Posts	PLEASE make a proper how-to for this... would love to do it but not overly confident