Hi everyone, joined the forum recently. Heres the G40 I bought as a non runner:
Has low compression on cylinders one and four, which I was sure was down to an incorrectly fitted head gasket. The cylinder head had been done just before I bought the car. So I got to work replacing it:
G-lader was looking a bit beat up
So gave it a wee spruce up
Removed head
As you can see, lots of action on cylinders two and three, not so much on cylinders one and four.
So I've replaced the head gasket (thought I'd taken a photo of the two of them together, but doesn't seem to have saved. Oh well)
Head back on and camshaft refitted
Mostly rebuilt.
As it turns out, the problem persisted.
Did a pressure test yesterday:
Before:
Cyl 1: 6 bar
Cyl 2: 13
Cyl 3: 12
Cyl 4: 9
After adding some oil to cyl's 1 and 4:
Cyl 1: 9
Cyl 2: 13
Cyl 3: 12
Cyl 4: 11
Confirmed what I suspected in that the cylinder rings are knackered. Also, listening to the engine, it seems the big end bearings may also be damaged.
Luckily, I managed to source a replacement bottom end from cheddarcheese on here. So stripped the engine again today, this time down to the bare block ready for the swapover. Just waiting for the block to arrive which should be on Tues.