disco turbo temperatures
Submitted: Tuesday, Nov 15, 2011 at 11:58
ThreadID:
90111
Views:
2290
Replies:
3
FollowUps:
14
This Thread has been Archived
ltzgonow
Hi all, Have fitted a low coolantlevel warning to expansiontank & am considering a Pyrmometer for the turbo, the ThermoGuard sounds ok any experiences out there?
Reply By: Member - Mark G Gulmarrad - Tuesday, Nov 15, 2011 at 12:52
Tuesday, Nov 15, 2011 at 12:52
ltzgonow
i fitted one to my Navara especially for towing......lets me know exactly what the exhaust temp is doing.
well worth it i my books,cheers.
AnswerID:
470077
Follow Up By: ltzgonow - Tuesday, Nov 15, 2011 at 13:13
Tuesday, Nov 15, 2011 at 13:13
Yep Mark G thanks I think this is where I will go, the Disco has some weird cooling geometry & I am concerned an extra sensor fitted to to top hose for coolant temp will not be as reliable as monitoring the turbo temp. This is because the waterpump is right at the top of the motor. did you do the fit yourself ??
FollowupID:
744533
Follow Up By: Member - Mark G Gulmarrad - Tuesday, Nov 15, 2011 at 14:51
Tuesday, Nov 15, 2011 at 14:51
ltzgonow
i bought the unit as a kit........had someone weld the sensor housing into the exhaust just below the turbo for me but wiring it up was easy.
FollowupID:
744538
Follow Up By: ltzgonow - Tuesday, Nov 15, 2011 at 15:07
Tuesday, Nov 15, 2011 at 15:07
Thanks Mark, my car appears to be the same as the one featured in the ThermoG stuff,
mine is Auto, but it already has a removable plate on the ex Manifold, I've been out this morning to check it... how lucky --it came undone easily after a couple of swift hits to the bolt heads with a brass drift so it increasingly looks like this is how I will go & do it myself. It needs to be right to tow the 2.500k Kedron.
FollowupID:
744539
Reply By: Bushranger1 - Tuesday, Nov 15, 2011 at 12:55
Tuesday, Nov 15, 2011 at 12:55
G'day
The low coolant alarm sensor should be fitted to the header
tank on top of the radiator.
If you blow a hose & dump out the coolant from the radiator & engine block the alarm will not register a drop in level of the expansion
tank & you will
cook the motor with no warning.
Cheers
Stu
AnswerID:
470079
Follow Up By: ltzgonow - Tuesday, Nov 15, 2011 at 13:40
Tuesday, Nov 15, 2011 at 13:40
Thanks Stu, Usually that is where I would go BUT previously the Expansion pressure
tank split & dumped the coolant, same as blowing a hose: as you say cooked -no warning. Also this is ( I think) a cross flow radiator the sensor- light & buzzer was fitted by a Landrover Guy, I feel I need to be able to see the engine temp from somewhere other than the coolant. The existing gauge is GOOD and responsive & predictable.
FollowupID:
744534
Follow Up By: member - mazcan - Tuesday, Nov 15, 2011 at 15:07
Tuesday, Nov 15, 2011 at 15:07
hi itzgonow
i bolted my engine watchdog temp unit onto the rear of the engine block on my bravo because imho
that area gets hotter quicker than mounting it at the front where the cooling air from the fan is blowing and this has proved to be spot on
it has proved and paid for its self on 2 occasions and is very very sensitive to temp changes
cheers barry
FollowupID:
744540
Follow Up By: ltzgonow - Tuesday, Nov 15, 2011 at 15:22
Tuesday, Nov 15, 2011 at 15:22
Thanks Barry, I will research this, ( where do I find one?) cannot have enough options where this is concerned. Ive had troopie diesel s, but they are more forgivving & far simpler.Was intending to insert a custom sleeve & sensor in the top hose but the complicated plumbing and air/bleed from the thermo housing etc seperate from & above the
water pump left me doubting that this could always be a reliable reading.Cheers Bexley
FollowupID:
744544
Follow Up By: garrycol - Tuesday, Nov 15, 2011 at 15:47
Tuesday, Nov 15, 2011 at 15:47
ltzgonow,
You should have bought the combo model. The one you have is not a temp gauge but simply tells you when you have lost
water - should be in the top of the radiator or top radiator hose not the overflow bottle.
The combo also has a sensor that bolts onto the head somewhere that measures the temp of the metal in the actual engine not the
water.
I have one in my truck and I am covered for loss of
water and increasing temp in the engine.
Garry
FollowupID:
744546
Follow Up By: garrycol - Tuesday, Nov 15, 2011 at 15:49
Tuesday, Nov 15, 2011 at 15:49
But your overall thinking is sound - an egt gauge will tell you far more quickly than either of the above what is happening in your engine.
Garry
FollowupID:
744547
Follow Up By: ltzgonow - Tuesday, Nov 15, 2011 at 16:43
Tuesday, Nov 15, 2011 at 16:43
Hi Barry, I agree with all you say and this is conventional & experienced thinking, guess what !the logic does not apply to this 2.5l turbo D motor. Upon reading up they describe the "pressure bottle" as an expansion bottle which HAS continual pressure/ flow thro AND air BLEEDING from the system ..via a " Y"piece. When it is correct as it now is there is no leak & no top-up, the previous motor which I cooked always had a minor usage of coolant as many cars do. Yep I wish the Landy guy had put a combo system on and I will now do this after the EGT is fitted. There is no top
tank on the cross flow system..The top hose is small & constricted below the thermo housing so this sounds like a good early warning---standing alone from all the other ...thanks. Bexley
FollowupID:
744554
Follow Up By: member - mazcan - Tuesday, Nov 15, 2011 at 17:04
Tuesday, Nov 15, 2011 at 17:04
hi itzgonow
www.enginewatchdog.com
a qld business
cheers
FollowupID:
744556
Follow Up By: ltzgonow - Tuesday, Nov 15, 2011 at 17:27
Tuesday, Nov 15, 2011 at 17:27
Thanks to all , Yes Garry & Barry good direction and it sounds like the Qld site will suit me ,Cheers all, I will NOW do ..both Regards Bexley
FollowupID:
744557
Reply By: Mark - Thursday, Nov 17, 2011 at 08:45
Thursday, Nov 17, 2011 at 08:45
Hi,
I have the thermoguard unit on my Disco 1 and it works
well. The only issue I have is there is no alert tone on the model I have so you have to keep an eye on the display when climbing hills etc. Have you tweaked the fuel pump on yours? if not it would be rare for you to reach high egt's and when I first fitted the thermoguard the highest I saw the temp go was 550c on a big long
hill, after tweaking I could hit 700c + but what a difference in power : )
Ian from thermoguard can provide you with the pump settings if your interested as he has a Disco 1 TDI himself. I ended up detuning
mine a little as I was hitting 720c which is the max Ian recommends.
Where to fit the EM-2 monitor on the 300TDI is
well covered over on the aulro
forum and the last I read was there is a threaded hole just below the thermostat housing on
the block that takes an M8 bolt
http://www.aulro.com/afvb/discovery-1/
If you are going to be towing 2.5 tons the biggest concern on the Disco 1 is inadequate cooling of the Auto box, the standard cooler is a joke and you can pretty much guarantee an early demise of the auto box if you stick with the standard cooler. My overheating light came on a few times when towing a 1200kg trailer and not long after the box failed due to heat. After the box was rebuilt I did a lot of research and found it was a common problem on this model, I then heard about fitting a RangeRover p38 cooler which I have now done and it runs much cooler and almost 4 times the size.
I've also fitted a digital thermometer to the cooler line and its surprising how the temp can creep up in the lower gears, once lockup is reached it cools down significantly but you can't reach lockup speeds on a
hill unless you switch to low range which is a pain!
Loads of info on the aulro site if you need more. And don't fit a normal after market cooler as the HP-22 ZF runs full pressure up to 200psi through the cooler during lock-up.
Cheers
Mark
AnswerID:
470223
Follow Up By: ltzgonow - Thursday, Nov 17, 2011 at 16:34
Thursday, Nov 17, 2011 at 16:34
Hi & Thanks Mark , some new & GOOD details for me, I Will visit the aulro sit with great interest, it will be new to me I will get back later thanks,. Also the Auto oil temp has only come on once on a long (hot) uphill out the back of
quilpie, stoppd let it cool,( turbo was on the way out... and went the next day) since had trans checkd, it was ok, done 6000ks since. I had been wondering about the trans cooler, must
check that out thanks.. Bexley
FollowupID:
744732
Follow Up By: Mark - Thursday, Nov 17, 2011 at 21:03
Thursday, Nov 17, 2011 at 21:03
hi Bexley,
If your transmission light came on your fluid temp must have exceeded 130c (266f) which will really shorten the lifespan of the transmission fluid. The sensor is also at the front of the car near the cooler so it would be around 10c hotter at the torque converter outlet.
Check out this chart
http://www.digi-panel.com/trannyoil.htm thats shows how trans fluid is affected by heat. My gearbox only had 120k on it but was destroyed after the fluid overheated and oxidised. I have switched to synthetic fluid now which can take a bit more heat and also seems to generate less heat in my experience. A rebuild of the 4HP-22 starts at around 4k so worthwhile changing the fluid if your temp light has been on. You can only drain about 5 litres out of 9 litres from the sump but there are methods to get most of the fluid out or you can find a transmission
shop with a transfer pump.
Cheers
Mark (discomark on aulro)
FollowupID:
744762
Follow Up By: ltzgonow - Thursday, Nov 17, 2011 at 21:13
Thursday, Nov 17, 2011 at 21:13
Thanks Mark, I will visit my transmission guy tomorrow,, am thinking I will do an engine watchdog TM2... Also probably a vdo anologue Pyrometer cause I dont think i can programme the digital one ALSO it may be less " in my face ??" Bexley.
FollowupID:
744764