KV6 - Head gasket or cracked Liner or ??
I fear the worst for the zt180 I bought before Christmas. If I'm not mistaken it may well be an ebay spares or repair job. Bit disappointed the chap I bought it off wasn't more honest in his answers, but hey, some people....and perhaps more fool
Here's the story. (A repeat to some people who read earlier posts). Car will occasionally lose coolant. First happened a couple of weeks back. Driving along, heater went cold then temp needle went up. Pulled over water had come out of somewhere near air box. Took a good 2 to 3 litres to refill it, but it was fine after that. Was doing lots of short journeys, checking the water regularly for any loss. None evident.
Then yesterday I had to drive round the M25 to Uni. 40 mile journey took nearly 2 hours (oh joy). By the end the heater was getting a bit cool so checked the coolant level once it had cooled down. It had gone from just above max to just below min. Refilled and drove home with trepidation in my heart. Made it without incident.
From as soon as I got it.... i.e. Before the coolant loss.
Fine when started from cold. Runs smooth and no steam from exhaust.
Once thoroughly warm it develops a mis-fire at tickover and steam comes from the exhaust. Still pulls fine and is a nice car to drive. Temperature needle stays in the middle of the gauge – although I understand that means very little with this engine.
Let the engine cool right down and their is still pressure in the cooling system.
The car has been fitted with the metal thermostat housing and there is no leak between the V’s. The cap on the header tank appears sound. The fan works as it should. All hoses are sound and clips are good. header tank doesn’t bubble when cold...haven’t tried it hot for obvious reasons. Oil appears to be free of coolant (cursory check), certainly no mayo round the filler cap. Not sure it may be using some oil though, which considering the few hundred miles I’ve done would not be a good thing.
From this I guess it is safe to assume there is a leak in one (or more) of the cylinders allowing coolant into the combustion chamber and exhaust gases into the cooling circuit. I would remove the spark plugs to see what story they tell, but it is too darn cold today and getting to the rear ones will be doubly awful because of the LPG system being bolted to the removal able bulk head.
My questions are:-
1. Could it be anything else.
2. Is there any way without removing the head(s) of telling if it is the head gasket or a liner? I take it the liners cost more to replace than a straight head gasket change...even though that may beyond economical repair.
Seems I’ve bought a lemon...boy will the wife give me stick. Paid just shy of a grand for it so not the worst disaster...but have fitted new tyres, had the LPG system serviced by some monkeys who knew jack (I had to fix it after their efforts) and bought all the bits for a service.
Thank you for your time.
Last edited by h4house; 17-01-2013 at 14:14.