Exhaust valve and spark plug broken up ouch! Large port questions
Well it all started with a missfire on cylinders 1 & 3 in which i done the usual (change coilpacks) with no luck
So next i thought i'd check the plugs which 2,3,4, seemed ok but cylinder 1 was in a sorry state
Starting to worry now and with plenty of helpful advice from phone calls to bill along the way compression test was the next thing on the list, which produced some worrying results cylinders 1 & 3 had 0 compresson and 2 had 25psi whilst 4 had 60psi at first was a bit sceptical as the car was drivable and these were very low so bought my own compression tester and produced the same results.
Plans to prep the car for the ring with westy and prawn have now been put aside to remove the head and the results weren't good
But the amazing thing is that the bores look ok, got a mate round who builds engines for a living and he said that they look ok but bore 1 is slightly glazed couldn't get a photo of it really but this is how the pistons look
My friend thinks that that head gasket was slightly letting by between cylinders 3 & 4 and one of the headbolts which was between these was slightly rusty/orange? And he said could see water marks in bore 3 and on the gasket?
Going to be taking the pistons and rods out today and think it is a convienient time to chuck some rods in. :eyebrows:
My friend will back round sunday with a bore gauge to check the wear in the bores so hopefully wont have to take the block out?
But all in all cylinder 1 is obvious whats happened but cant work out what caused the low comp on the others
Help and opinions on cause and large port options would be very appriciated?