I know a couple of people have had and fixed leaks in the coolent system and from Shipkillers write up am pretty confident I could fix my leak if I could find the bloody thing!
My z is loosing coolant, but only seems to do so on long motorway journeys, I've been keeping my eye on the tank levels for a while now and in normal daily driving (couple of miles to work, pottering round the shops and jaunts up into the lake district) it doen't seem to lose any water at all, but after a good run on the motorway (3-4 hours) the level drops. I've had a good look round and can't find any obvious leaks, have the car booked in for an MOT at the stealer next week (£27 bargain) and whilst its in they're going to do a pressure test to see where the leak, will cost £87 for the diagnosis, so this got me thinking..........
I've got access to pressure test gear at work and wondered if I could do the check myself and save a bit of dosh. I assume that the garage will put a test fitting onto the coolant tank filler cap and pump the system up with a tangye pump? couple of questions..
1. is there any reason why this should definately not be done, ie will i ruin something?
2. What pressure does the cooling system get up to during normal healthy running. I assume that the fact the problem only seems to occur on long motorway runs must be due to the system being at its working temperature and pressure for a prolonged period. The temp gauage has never risen above the normal stright up position.
My z is loosing coolant, but only seems to do so on long motorway journeys, I've been keeping my eye on the tank levels for a while now and in normal daily driving (couple of miles to work, pottering round the shops and jaunts up into the lake district) it doen't seem to lose any water at all, but after a good run on the motorway (3-4 hours) the level drops. I've had a good look round and can't find any obvious leaks, have the car booked in for an MOT at the stealer next week (£27 bargain) and whilst its in they're going to do a pressure test to see where the leak, will cost £87 for the diagnosis, so this got me thinking..........
I've got access to pressure test gear at work and wondered if I could do the check myself and save a bit of dosh. I assume that the garage will put a test fitting onto the coolant tank filler cap and pump the system up with a tangye pump? couple of questions..
1. is there any reason why this should definately not be done, ie will i ruin something?
2. What pressure does the cooling system get up to during normal healthy running. I assume that the fact the problem only seems to occur on long motorway runs must be due to the system being at its working temperature and pressure for a prolonged period. The temp gauage has never risen above the normal stright up position.