Overheating but only when towing!

discofever · Jul 18, 2007

Hi all, Can anyone tell me why my N reg 300tdi Auto overheats when towing - only on uphill sections. The gauge heads upwards towards the red however there is no loss of water from the system. I have recently had a new cylinder head put on and it has been running like a dream. No problems with the vehicle overheating when I am not towing. Whats the problem please???

Jason2 · Jul 18, 2007

discofever said:
Hi all, Can anyone tell me why my N reg 300tdi Auto overheats when towing - only on uphill sections. The gauge heads upwards towards the red however there is no loss of water from the system. I have recently had a new cylinder head put on and it has been running like a dream. No problems with the vehicle overheating when I am not towing. Whats the problem please???

Sounds like yeh radiator is caked up!Either externaly or internaly,take front grill off, blow through with an air linen or power wash.Internaly try flushing through with a hose pipe.If that dunt work it's knacked!!

The Mad Hat Man · Jul 18, 2007

when it is hot - try placing yo hand on the radiator - any cold spots indicate a blockage.

Grippa · Jul 18, 2007

FFS Heidi...........& any really hot spots indicate that you are off to A&E for a skin graft.

I'd do it when it's warm, not when you've just been towing up a long hill, on the motorway.

The Mad Hat Man · Jul 18, 2007

well yeah - yu rite - by hot - i dint mean steamin out the radiator cap - just not cold.

Toad · Jul 19, 2007

I have had the same problem in the past, towing up those never ending mountain roads in the Scottish Highlands. However, I've not had a problem since removing my EGR valve. I don't know whether it's removal was relevant, but it may just be worth looking at.

ttam lleb · Jul 19, 2007

I`m really intrested in this post, currently have overheating TD5 (may be water in fuel)about to go towing in a weeks time and have an unfitted egr plate that I want to fit this weekend but won`t incase it adds to my problems.

Jason2 · Jul 19, 2007

ttam lleb said:
I`m really intrested in this post, currently have overheating TD5 (may be water in fuel)about to go towing in a weeks time and have an unfitted egr plate that I want to fit this weekend but won`t incase it adds to my problems.

Removal of the EGR valve CAN only ease your problems

Get rid-NOW! Easy job, have you got the kit or just the plate?

If you are over heating you want to be looking at air lock in the coolant system or blockage,leaks,blocked radiator (internaly/externaly) and worse case scenario head casket!

Jason

cavking · Jul 19, 2007

Hi mate
have you checked your viscous coupling on your cooling fan, Should spin freely when cold and lock fan mechanism up when hot, Try spinning the fan when engine hot AFTER SWITCHING OF ENGINE the fan should not spin freely
hope this helps

ttam lleb · Jul 19, 2007

thanks all for my help,i have the full egr kit, oval plate and metal tube on square base, i have no little bung/stopper but told small bolt and clip would do. i will fit this weekend and also take off rad to flush through.

discofever · Jul 19, 2007

lots to do and check. Will be back when ive checked...after the rain stops in October!!!

Overheating but only when towing!

discofever

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Jason2

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The Mad Hat Man

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Grippa

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The Mad Hat Man

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Toad

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ttam lleb

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Jason2

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cavking

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discofever

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