After getting back from the Alps a strange water leak problem popped up. It never got worse or better, so I could have left it and refilled often but I wanted peace of mind before it got worse.
Some simple fixes I tried before going further were:
1. Trying a new cap - as it might be releasing less than 1bar.
2. Remove the thermostat.
3. A pourus radiator.
4. Air in the system - so filled it up by the rad.
5. Back flushed the radiator.
6. Pressure tested the entire system and looks for leaks. These may be drawing in air.
After a bit of investigation it turned out to be the dreaded head gasket. To explain in more detail, the water was building up a pressure into the coolant system slowly as I drove. When it reached 1bar, the limit on the cap, it blew about a litre out the back of the tank.
A diagnoses I easily reached by taking the cap off > replacing it > then holding the main coolant hose and revving the engine from the bonnet area. I could feel the pressure build up my hand but didn't see it blow out the cap (which it did after about 30mins of driving). There was also
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small bubbles coming through into the reservoir. I certainly couldn't afford a dealer to do it and most garages said no chance when I mentioned the problem.
I've never done a cambelt before (brakes and oil pumps were my previous best!) but was willing to try, so I bought a Brookes workshop manual and did as much research as I could.
I got some morale support from a friend who is mechanically minded (the picture says it all) and off I went:
Some things I learnt along the way:
- Plan to get it skimmed 'well' in advance. It's not always the 1/2 day job they tell you!
-Leave the lower cambelt cover on if you can. The belt can the manoeuvred out.
-Mark the cam belt pullies with tipex for peace of mind. If you leave the drill bit in the injection pump not a lot can go wrong. PM me if you need to know how to find the flywheel mark. ]
- Check the weather before starting. I did it on my mothers drive and after horizontal rain had to go to B&Q to buy a plastic sheet (£2), aka roof.
- Hit the dampener pulley off with a piece of wood and a hammer if it's stuck.
- Clean (and I mean clean) all the edges with a scalpel blade until spotless.
- Take photos of all the electrical connections. I forgot where some went after a week and had to resolve problems with earths and immobilisers going off.
- Leave all the injectors loose when trying to start it and do them up when it does to bleed air out.
I can write loads on this but as they say .. a picture says a thousand words:
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