I have noticed that when I start my mk1 Eunos, there’s white smoke coming from exhuast, i have read up that can be head gasket going and/or Piston rings going.
Could this be other things, think engines running rich and know back box has gone/ maybe Cat. Could these be to blame?
i am planning on rebuilding engine at some time soon. But just trying to plan ahead with this, as had hoped not to delve into the pistons as know can be issues when replacing crank etc on a short nose
White smoke could be steam from a head gasket failure where there is a breach between the coolant and inlet so coolant being expelled as steam in the combustion chamber(s) affected.
Given this I would expect the coolant level in the expansion bottle to drop and possibly some white creamy deposit inside the engine oil cap.
Here is a video link of head gasket failure tests where not immediately obvious.
If the gasket has gone and no other problems, you should be able to do the work without interfering with the main crank bolt.
If the piston rings were gone, I would expect to see blue smoke and smell burnt oil as oil that bypasses rings gets burnt off in the combustion chamber(s)
This was on second start up, So Could be condensation as currently can’t drive on road, due to no MoT, Will roll with a headgasket change too as noticed coolant is brownish! This doesn’t contain oil of what I can tell, but prefer to prevent rather than cure any furture problems.
Don’t do that head gasket unless you are sure it has gone. Head gasket failure sufficiently rare on an MX5 to make it worth checking thoroughly.
Usually the higher pressured cooling system pushes coolant into the oil system rather than the other way around.
Brown coolant is quite possibly a result of corrosion from steel in the engine block where antifreeze fatiqued or in too low a concentration to suppress oxidation. Try dumping existing coolant, flushing thoroughly with hosepipe, particularly radiator and then start afresh with new.
