The only think I'd done to the car that could have influenced this was to fit the catch tank. So I investigated, the catch tank inlet is narrower than the rocker box vent that feeds it, could the step down create a restriction that could allow a build up of pressure? I seriously doubt it but I've gone back to vernting to atmosphere for the rocker cover vent. I didn't want the catch tank to sit there doing nowt so I opened up the vent at fuel pump blanking plate (the pumps now electric and in the boot) and vented that to the catch tank. We'll see if that does anything.
I also did a compression test to see if I could find anything interesting there. I'm never too sure what these readings mean but I'll find out. For now though
- 150 psi
- 165 psi
- 160 psi
- 130 psi
- 150 psi
- 120 psi
That's quite a spread, 10 to 15% is usually said to be acceptable. So I took it out for a blast and of course, it scared me and was great for it! It's one of those things where I think I don't really want to mess with it as it's so damn good BUT it won't get any better by just driving it.
I have all the neccessary to change the gasket but I'm thinking maybe a better copper one should be sourced, rather than the grey one that's on it and that I have "in stock" - I've had issues with those grey gaskets before on the Herald.