![]() | Home > Technical (L322) > Lower thermostat modification V8 4.4 M62 2002-2005 |
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doclees Member Since: 24 Jun 2015 Location: PA Posts: 672 ![]() ![]() ![]() |
Just returned from a 700 mile trip with no measurable loss of coolant through the pinhole in my radiator vs the usual 8oz loss. So the lower temp does seem to stress the system less. Don't see any change in gas mileage (petrol mileage). |
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knares Member Since: 22 Jun 2017 Location: Perth WA Posts: 764 ![]() ![]() ![]() |
do you just leave the sender unit in the housing, the housing he replaced didnt seem to have a sender unit in it |
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8382 ![]() ![]() ![]() |
There is no sender unit, there is a control for the thermostat which is no longer used when a "normal" thermostat is fitted... The plug housing stays in the old modified thermostat housing but you should disconnect the plug in case it starts leaking... |
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doclees Member Since: 24 Jun 2015 Location: PA Posts: 672 ![]() ![]() ![]() |
FYI mine is throwing a check engine light with either the Electric thermostat circuit fault or the Stuck thermostat fault code being the issue. So I guess it's time to order the 10 ohm 100w resistor. |
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UK Marine Member Since: 22 Jul 2016 Location: Durham, County Durham UK Posts: 830 ![]() ![]() ![]() |
I've had the thermostat mod fitted for 10 months and have had the electric thermostat fault for that entire time but it has never thrown up the check engine light. Can I suggest you check your fault codes again as I know that the thermostat fault does not activate the check engine light... ______________________________
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doclees Member Since: 24 Jun 2015 Location: PA Posts: 672 ![]() ![]() ![]() |
2 codes as above. Not sure which one gives the check engine light but it is one. Instructions from mod manufacturer has the recommendation for the 10 ohm 100 watt fix. Thought it was my Lambda fault but no. Some do it some don't. |
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ohuntsman Member Since: 21 Mar 2016 Location: Surrey Posts: 337 ![]() ![]() ![]() |
Have just ordered the kit and eager to get the mod done.
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doclees Member Since: 24 Jun 2015 Location: PA Posts: 672 ![]() ![]() ![]() |
No wrong housing. No quick connect for the hose. The cutting is easy. I used pliers to depress the thermostat spring and removed the guts first so things don't go flying. |
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doclees Member Since: 24 Jun 2015 Location: PA Posts: 672 ![]() ![]() ![]() |
This is irritating. I installed the 10 ohm 100 w resistor as per the modification thermostat instructions but still getting the 2 fault codes of which one of them is giving me a service engine soon light. 0x48c and 0x48B . Anyone have a suggestion? |
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doclees Member Since: 24 Jun 2015 Location: PA Posts: 672 ![]() ![]() ![]() |
OK a side question with the mod. Is there any evidence this improves the life of the valley pan gasket? |
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8382 ![]() ![]() ![]() |
Anything that reduces engine temp has to be good for all aspects of the engine, including gaskets...
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8382 ![]() ![]() ![]() |
3/8 drive, deep socket fits perfectly, takes about 20seconds....!!! Pete
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kanikune Member Since: 29 Oct 2017 Location: Teerijarvi Posts: 28 ![]() ![]() ![]() |
Did this thermostat swap week ago. Been great so far. Getting the air out worked really well. Got the bleeding screw Off and poured new coolant in really slowly. Pumped coolant line connecting to thermostat couple of times in the end.
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ohuntsman Member Since: 21 Mar 2016 Location: Surrey Posts: 337 ![]() ![]() ![]() |
Went to do this mod today and the OEM thermostat that I had fitted has a a central column that wouldn't allow the kit to fit into the housing |
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