Quote:
Originally Posted by Mike Noc
Well not strictly my car but Mrs Noc's 75. Yesterday I thought I'd replace the thermostat and O ring as it was leaking coolant. Not the quickest of jobs, and once finished refilled the coolant and let the car warm up on idle. Lo and behold after a few minutes the coolant pipe started dripping as pressure built up in the system. 
Stripped it all back out last night and this morning got hold of a genuine LR O ring and compared the size to the viton O ring I had fitted. The viton one was slightly undersize, so that explained the leak. 
Fitted the LR one and all is now well. Just to be on the safe side I got the old GhettoTech cold pressure tester out and checked the system was coolant tight before fitting the engine mount and other gubbins back on.
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Brilliant Mike, saves me annoying Mrs MB any further as I have turned the house upside down looking for the three I have left in the packet.
XPart don't have the drawing for it either
Brian
P.S. the ZT passed the MOT
