Hasbeen wrote:Be careful of the water pump.
After my engine rebuild about 4 years ago, I had an occasional overheating problem. It could even get a bit hot on part of a drive, then behave perfectly most of the day.
We ultimately found, with great difficulty, that the impellor was not a full tight fit on the shaft, & would sometimes slip, then sometimes not slip. By the appearance of the shaft it would get hot, & or galled, then grip, but not always.
This was one of the most difficult things to diagnose I have ever had.
Thanks Hasbeen, what a nightmare! I never knew that the pump required such intricate set-up when re-installing, or that it was so fragile.
Some years ago (I was about 22 at the time, now 48) I took my TR7 on a continental trip and the water pump failed. As it happened a mate of mine was flying through the area at the time so he bought me a new pump in the UK and we did a quick exchange at the airport before he got on his tour bus.
When I got back to the car we had no tools (such as the slide hammer) to remove the old pump, so we parked the car on a steep hill, tied the pump to an olive tree and let off the handbrake. Amazingly that pulled out the pump! We then fitted the new one with no thought at all about gasket clearance, impeller erosion etc.
No wonder that the car then spewed oil and water from the holes in the block, and eventually the big ends went somewhere on the Paris ring road. Still made it back, though