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Installed Britpart's PEL500110 on D2 v8 with swapped 4.6 instead 4.0 With old OEM t-stat temperature gap was 96-106C, now it's 91-96. Replaced it bacause el. fan was always running bacause of high temperature. The first fun part of this history is that on the package of the new t-stat was written "not for sale outside UK and EU", and it was bought in Russia. The second, is that in the package was "MotoRad" t-stat. But it works fine, i'm satisfied. Thank's AULRO community!
I have been running a PEL500110. Normal running in town and on the highway is a very stead 85-87. Only occasionally in heavy traffic will I get to 90. Doing some very steep off road load range stuff and reving the engine hard to get up a mountain I achieved mid to high 90's on a wam day (28 degrees). I am very pleased with it. I have yet to tow my boat (2 tonns) but I think it is the right thermostat choice for much lower running temps.
Cheers
Running a pel500110 in my 4.6 high compression motor. It is returning typically 84-87 on hot days in sunny Qld. Towing a 2 tonn dual axel trailer boat on a hot day a few weeks ago returned 90-91 degrees when labouring up hills in overdrive (5th). I have had the thermostat for 8,000k and am very happy with it. Offroad on steep climbs in low range is is typically around 90-91 degrees. The hottest it has been was 93 in very stop start traffic on a high 30's day.
Cheers
PS. I wonder if some of you who have bought pel500110's might have been given the wrong part...?
I got the 82c Pem101820 with the hard spring, which dropped the temperature as expected. If you check the coolant flow diagram you can see that the hard spring will force more coolant around the radiator, where as the soft spring will be more easily overcome and allow more coolant to bypass the radiator.
I've since replumbed the system with an inline Thermostat.
Lee what are your coolant temps now and what were they with the hard spring set up stock.
Cheers
hi, with the hard spring 82c stat, temps dropped to about 90C.
With the re-plumbing, inline stat and electric fans, it's 75-80c, which are Des Hamills guidelines for these engines.
I've tried in 40c temps, elec fans are ok (and infact much better at idle where the (new) viscous doesn't seem to shift enough air and temps slowly rise. I'm yet to try off-road, maybe this weekend if I have time. Same fans are used on a huge 5.4l 300hp V8 in the Falcon with same size radiator, so hopefully the rover V8 shouldn't create much more heat than that!
Hi D2lee - Confirm your D2 is the V8 and where did you purchase the thermostat - locally or on line?
Peter
hi, yes it's 4.0 V8.
I got an inline 'stat housing from ebay and fitted into the top hose. Takes a standard Tridon stat from supercheap (although they don't stock all the temp range).
Took out the old stat housing and connected the bottom hose directly to the pump inlet (with an inline joint)
Blocked off the hose from the pump outlet to the bypass valve.
Now, this potentially creates an issue with too much pressure through the heater matrix when the radiator stat is still closed, so drilled 2 holes in the new stat to allow some pressure relief. (engine warm up take approx. the same time as with the old system and viscous fan).
now all coolant either goes through the radiator or the heater matrix, instead of (at least) 10% bypassing the rad all the time.
Also allows you to choose any stat 71c-90c+
Current stat range 71c - starts to open and ~82c fully open.
Falcon electric fans are electronically controller by a programmable thermostat, with manual override direct to two relays (for redundancy).
Set them to come on around 78c, when the stat is nearly fully open (or a couple of degrees less when off roading).
Normal operating temp, typical 25-30c day, around 70-78c.
Offroading max temp (did some serious stuff at the weekend) 82c.
Fuel economy over 1 week typical commute -50% freeway, 50% stop/start highway (same as previous weeks), 15.5l/100km, no change from running at 96c with viscous fan.
Also have alarms for;
low coolant level
engine temp via obd
engine temp via separate sensor
trans oil leakage sensors at both crimp joints near the cooler.
is this the inline stat you got from eBay D2lee?
Inline Thermostat Housing With 1 1 2" Inlet Outlet | eBay
Thanks for the info D2Lee. That is very useful info, especially about the extra pressure buildup.
I may consider your mod as my P38 typically runs 96-98 when idling at lights on hot humid days in Brisbane - otherwise it stays around 88-90. All cooling system is new. Ive already been through one cracked block on my previous 4 litre P38
Beside reading water temp I also monitor coolant pressure gauge and low coolant.
Coolant pressure stays at 0.6 bar or top hose can be squeezed to about 2cm when hot.
How are you sensing fluid leaks at the transmission hoses?
Peter