Diesel thermostat definative answer - Page 93

bdm09 · 24th January 2011, 12:26

fitted sc housing yesterday - presume from new batch as i ordered it before xmas when there was non ready. It has no hole in the stat which is marked with '988c 10-1301'.
1st 100 miles: much quicker heat in cabin. Reached 'normal' ( 1/4 too ) within 5 miles (never seen 'normal' before! ). Never rose above 1/4 too.
Me happy.

PaulR · 24th January 2011, 15:36

I had a proper run in it today of about 25 miles. It took about 6 miles to reach a steady state of about 84 degrees and only moved about 3 degrees either side of that. Nice warm feet!!!

I am happy also.

wuzerk · 24th January 2011, 16:58

Excellent. Good to hear from a couple of owners who are pleased with no complications.

David Lawrence · 24th January 2011, 20:36

Quote:

Originally Posted by wuzerk

DAVID: I mentioned the fact that Meziere advised me to drill two 4mm holes in the stat since it seemed excessive to me at the time and both mine and your results have confirmed that. Perhaps their experience on hot rods etc. was that allowing that much coolant to pass through a closed stat prevented problems with sudden temperature changes on their highly tuned, fragile engines? Looks as though around a one sixteenth hole will sort your problems but I think that is only on your particular stat. Awaiting your results with interest.

Wuzerk ! Tonight's result much more promising. With the 3mm hole yesterday it struggled to reach temperatures between 78 and 80 after a good 45 minute run. Tonight I took it out again, and sealed up that hole with a pop rivet and drilled a 1mm hole next to it. The ambient outside air temperature is similar to last night but after 10 minutes the temperature was up to 85, then after a further 20 minutes driving around 70mph the temperature was ranging between 93 max down to 87 min, so a +-3 range. Much more stable than with no hole, and much warmer than with a 3mm hole. Around town after the faster run it settled between 87-90.

I'm much more comfortable with a max of 93 than with 103, so I'll leave it alone for the next few weeks now and see how it does over a variety of driving conditions.

Thomas · 24th January 2011, 20:41

hmmm wonder why I am not experiencing as good temps as this? must try yet another thermostat

David Lawrence · 4th February 2011, 16:49

Wuzerk !

Another 2 weeks has passed since i settled on a 1mm hole, but today after a 2 hour drive including some hard uphill stretches, the max I've seen was 96 for a few brief moments. It is settling between 87 and 93 for the majority of the time. So I have no more worries about 100+ temperatures seen before the hole. She's running lovely and smooth with it too.

Number 6 · 4th February 2011, 17:12

Well I had the opurtunity of giving my car a good long run earlier this week,a round trip of 260 miles.

Mainly A roads and motorways,besides a very short warm up period,the temp cycled between 86C and 93C,so happy with that.

Consumption before was (Brim to brim) 50.3 MPG, on this journey it returned 53.4 MPG so it would appear to have marginal improvement so again happy with that as well

Will continue to monitor and report on this forum

wullie480 · 7th February 2011, 13:59

I think mine is running a bit to warm?
On the journey to work today ambient temp 8-9C it sat at 96 then dropped to 86 then upto 96 again which was ok till I hit the hilly bit's went to 106 so I think tomorrow it's coming off to get a 1mm hole drilled into it.
I have fitted a QTH107 stat to mine and was wondering what everybody else's set up is and how there getting on?

Jules · 7th February 2011, 14:11

As stated previously the QT107 orifice is smaller by a couple of mm compared to the Stat supplied with the housing so these warmer readings are very similar to the experimental Renault Stat we tried inside the hose without the housing.
Have to wait and see when even warmer ambient temps come our way

Number 6 · 7th February 2011, 14:41

Have to wait and see when even warmer ambient temps come our way

Hi Jules Your quote above,Do we have your word on this????

24th January 2011, 12:26	#921
bdm09 Regular poster MG ZT Join Date: Dec 2010 Location: Northumberland Posts: 34 Thanks: 1 Thanked 0 Times in 0 Posts	fitted sc housing yesterday - presume from new batch as i ordered it before xmas when there was non ready. It has no hole in the stat which is marked with '988c 10-1301'. 1st 100 miles: much quicker heat in cabin. Reached 'normal' ( 1/4 too ) within 5 miles (never seen 'normal' before! ). Never rose above 1/4 too. Me happy. Last edited by bdm09; 26th January 2011 at 11:55.. Reason: i am an oaf.

24th January 2011, 16:58	#923
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	Happy Excellent. Good to hear from a couple of owners who are pleased with no complications.

4th February 2011, 17:12	#927
Number 6 This is my second home Rover 75 tourer Club CD/Limo Tints Join Date: Nov 2008 Location: Meneac Posts: 6,759 Thanks: 5,007 Thanked 1,609 Times in 869 Posts	Renault 5 stat Well I had the opurtunity of giving my car a good long run earlier this week,a round trip of 260 miles. Mainly A roads and motorways,besides a very short warm up period,the temp cycled between 86C and 93C,so happy with that. Consumption before was (Brim to brim) 50.3 MPG, on this journey it returned 53.4 MPG so it would appear to have marginal improvement so again happy with that as well Will continue to monitor and report on this forum __________________ ] "I started out with nothing, and Ive still got most of it left!"

7th February 2011, 14:11	#929
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	As stated previously the QT107 orifice is smaller by a couple of mm compared to the Stat supplied with the housing so these warmer readings are very similar to the experimental Renault Stat we tried inside the hose without the housing. Have to wait and see when even warmer ambient temps come our way __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

7th February 2011, 14:41	#930
Number 6 This is my second home Rover 75 tourer Club CD/Limo Tints Join Date: Nov 2008 Location: Meneac Posts: 6,759 Thanks: 5,007 Thanked 1,609 Times in 869 Posts	Have to wait and see when even warmer ambient temps come our way Hi Jules Your quote above,Do we have your word on this???? __________________ ] "I started out with nothing, and Ive still got most of it left!" Last edited by Number 6; 7th February 2011 at 14:48..

24th January 2011, 15:36	#922
PaulR Regular poster Rover 75 saloon (and P4 100) Join Date: Oct 2008 Location: Southport Posts: 87 Thanks: 9 Thanked 8 Times in 7 Posts	I had a proper run in it today of about 25 miles. It took about 6 miles to reach a steady state of about 84 degrees and only moved about 3 degrees either side of that. Nice warm feet!!! I am happy also.

24th January 2011, 20:41	#925
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	hmmm wonder why I am not experiencing as good temps as this? must try yet another thermostat

4th February 2011, 16:49	#926
David Lawrence This is my second home Rover 75 CDT-2001 Join Date: Jan 2009 Location: Wrexham, North Wales Posts: 3,606 Thanks: 195 Thanked 606 Times in 501 Posts	Wuzerk ! Another 2 weeks has passed since i settled on a 1mm hole, but today after a 2 hour drive including some hard uphill stretches, the max I've seen was 96 for a few brief moments. It is settling between 87 and 93 for the majority of the time. So I have no more worries about 100+ temperatures seen before the hole. She's running lovely and smooth with it too.

7th February 2011, 13:59	#928
wullie480 This is my second home 1 Join Date: Dec 2010 Location: Banned Posts: 5,195 Thanks: 528 Thanked 1,022 Times in 786 Posts	I think mine is running a bit to warm? On the journey to work today ambient temp 8-9C it sat at 96 then dropped to 86 then upto 96 again which was ok till I hit the hilly bit's went to 106 so I think tomorrow it's coming off to get a 1mm hole drilled into it. I have fitted a QTH107 stat to mine and was wondering what everybody else's set up is and how there getting on?