My son bought a 1999 MX5 NB and we've been working on it together. I'm not sure we know what we're doing, but it's been fun learning together.
About a couple of months ago a hose split and the car overheated pretty badly. He eventually got the car towed home by the AA. The car no longer starts and the AA man though he could smell exhaust fumes through the radiator.
We've eventually got around to looking at it this week. Firstly we did a compression test with the following results:
First 50 49 28 49
Final 60 52 37 52
Wet 69 62 42 62
Not good eh? We then stripped it back to check the timing belt and all seems ok there. Today we got the head off and here's where we need some help. I expected the gasket to be in bits but it's not. It's one of those multi layer types. The only thing is that the layers are coming apart in places - does this mean it failed? I'm guessing it must have because it looks like there's small amounts of water in the cylinders along with some rust build up where it's been sitting since it happened. I did remove the spark plugs before we stripped it back but they seemed dry. The pistons don't look too bad to me but as I say, I'm not sure I know what I'm doing (or looking for). There are some scratches just below the camshaft on the inlet side and one of the (coolant?) holes seems slightly odd; although this could be a deliberate part of the manufacturing process. Pictures are below. The block seems pretty flat to me, although one of the head bolt holes has a bit sticking out (see the photo as I'm not sure I'm describing this particularly well).
Can we just clean everything up, put new gaskets on and reassemble or do we have bigger issues?
All help appreciated!