September 4, 2011, 5:25 am
[quote name='gary m h' timestamp='1315130811' post='142733']
Hey Dan. Many thanks for your swift reply. I'll check on the rocker cover to see which type of engine it is. It really is frustrating. I have been informed that I can drive the car without the thermostat in as the only effect this will have is no heating.. At least I will than be able to determine if the thermostat is at fault. It just is firmly in place and difficult to get any leverage with a screw drive to lift out. Even pliers have no effect. Cleaned the surrounding area around the thermostat of any thing that could possibly be hindering its removal...Does the different engine types mean that different removal methods are required..Thanks. Gary.
Hi Gary, I'm pretty sure you have the overhead valve engine (it's a really good engine, such simple mechanics). Your thermostat should just pull out, you are right you can drive the car without a thermostat but it means you'll have no heating for longer because the engine will take longer to heat up. If once you've removed the thermostat and the engine doesn't overheat you know the culprit has been found. To be honest you could probably leave it like that if you weren't too bothered. If you're doing it on the cheap you could even make a gasket out of some cardboard (like a cereal box for example).
The different engine types isn't that important, I was just curious really because I was basing my answer on the OHV valve engine which was in the Ka for years even after 2000.
If the thermostat is really stuck then the only thing I could think of that would help is to use some mole grips, lock them firmly around the top of the thermostat (don't worry about breaking/bending it at this stage) and give it a bloody hard pull. You'll probably find if you try that it will come out and you'll be able to see how it was stuck in there in the first place. With the age of the car and the fact it has been overheating it's probably rusted/cooked itself into the head, but the weakest point will be the thermostat so don't worry about damaging the head as long as you are careful about the mating surfaces.
If you were near to me I would offer to come and give ya a hand! Hope that helps a little bit anyway mate and keep us posted
EDIT: Spelling and grammer OCD