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yippee look what i found for ya !!

http://rover.ebay.com/rover/1/710-5232-2978-1/1?AID=9479574&PID=1428744&mpre=http://cgi.ebay.co.uk/SHARAN-ALHAMBRA-Mk1-2-0-1-9-TDi-RADIATOR-NEW_W0QQitemZ310009286208QQihZ021QQcategoryZ9889QQtcZphotoQQcmdZViewItemQQ_trksidZp1713.m153.l1262

Hi folks

Thanks for all your replies. A question was raised about coolant level. Well, after each episode of overheating I checked the level the following day when everything had cooled down and the level had dropped significantly, I need to add a couple of pints. I had assumed that this was because a valve somewhere had released the steaming hot water to prevent the entire system from blowing up.

One thing to add, while towing it's not the revs that are causing the problem, as I hit a hill I press the accelerator for more power but remain in the same gear so the revs remain the same, after a couple of minutes the temperature rises.

Also, took it for a blast (solo) down a quiet dual carriageway one evening, 80mph for a good 20 minutes, including hills, no problem whatsoever.

Julia,

Check with your mechanic as to where he got the replacement pump from.

There was an issue with VW water pumps where when the pump got hot the impeller slipped on the shaft thus causing overheating when put under load.

Seat (& VW) only supply the latest type of pump that should be a cure for the problem, but there are a lot of the earlier type of pumps about from non Seat/VW suppliers

If the pump supplied has the VW part number 038 121 011 CX its the earlier type for the 1.9TDi, what you want is 038 121 011 JX which is the later type

Julianp,

Head gasket change on the 1.9TDi is about 4 hours work, so depending on your mechanics labour rate it shouldn't be too expensive.

As an ex mechanic I'm somewhat surprised that your mechanic didn't carry out a Block test (thats the chemical test for combustion gases within the coolant) as part of his original diagnosis when checking for the cause of the overheating, in my day it was standard procedure, as it only takes about a minute to do, & it tells you instantly if the head gasket has failed