P38a Cooling A|C Fan Mod Question for Datatek

Hi
Have a question re A\C fans on P38 Diesel
My radiator burst last week no symptoms running up to it etc etc
Fitted new rad and run up to temp (12 oclock on gauge) nanocom showing 99 Degrees. at 99.83 both A\C fans kicked in and it cooled down to 94 degrees. I hadn't refitted Viscous fan at this stage
did the last P38 Diesels already have your mod done mine is a 2002 as I have had it since 2006 and havnt messed with this side of things.
been running on new rad now for over a week and all good

Thought all the later models had the A/C Condenser Fans come on when the Temp gets above a certain level as additional cooling...

EDIT: Seems like only on the petrol model...the ECM can also turn them on when the car is off for additional cooling.

that's what I have read but mines a diesel

uk03065 said:

that's what I have read but mines a diesel

Click to expand...

It may be a feature of the later Diesel models too, RAVE has been known to have errors and omissions...

Datatek should be around in the morning to give further advice!

uk03065 said:

that's what I have read but mines a diesel

Click to expand...

Diesel models have Aircon fan cooling assistance after 1999. Extra temp sensor on head for this purpose.

wammers said:

Diesel models have Aircon fan cooling assistance after 1999. Extra temp sensor on head for this purpose.

Click to expand...

That is what I have heard previously...just not written in RAVE...not unsurprisingly!

thanks so all good working as intended

uk03065 said:

thanks so all good working as intended

Click to expand...

It would seem so. Has always been a feature on the petrol engines to assist cooling in times of high temp and extra load, Eg when idling in traffic with aircon tuned on. Was introduced on diesel engined cars MY 1999.

uk03065 said:

thanks so all good working as intended

Click to expand...

It's the third sensor towards the rear of the head, however don't rely on it for cooling as on mine the sensor operates at 105C so the engine is very close to an overheat. My mod introduces and adjustable stat to bring the fans on just above normal temperature. You can then dispense with the viscous fan and cowl. Sounds like your viscous is shot anyway.

Hi Datatek

Can you send me details of your mod

Thanks

uk03065 said:

Hi Datatek

Can you send me details of your mod

Thanks

Click to expand...

PM me with an email address.

PM sent Thanks

Thanks data got your mod, what temperature would you set the coolant at (90 to 95?) thanks

uk03065 said:

Thanks data got your mod, what temperature would you set the coolant at (90 to 95?) thanks

Click to expand...

Read the instructions

I have just done Datatek's mod to mine, along with a new water pump with the metal impeller, and new thermostat and new hoses. Its working fine now. Will be pulling the caravan in a couple of weeks, so think it will be fine this time.
The existing pump had a plastic impeller and the viscous fan was fubared i think as I tried the newspaper test.
Cant take any chances, My disco 300 overheated with my van on and cost me a small fortune being repaired at a garage away from home.

Hi All

Is the mod diesel only?
If petrol too, will it work on a 96 GEMS? Not to replace the viscous but to compliment it when needed.
Is this a stupid question?
Cheers

JamesBB said:

Hi All

Is the mod diesel only?
If petrol too, will it work on a 96 GEMS? Not to replace the viscous but to compliment it when needed.
Is this a stupid question?
Cheers

Click to expand...

Yes it works on all petrol versions, I have sent you a PM.

Hi Datatek, I wonder if I could trouble you for the fan mod as well? Thanks

Bladerunner919 said:

Hi Datatek, I wonder if I could trouble you for the fan mod as well? Thanks

Click to expand...

PM me with an email address. The mod cannot be used to try to mask an overheating problem but on the diesel will happily replace the viscous fan.

Datatek said:

Yes it works on all petrol versions, I have sent you a PM.

Click to expand...

Cheers. Responded