Hello been over 3 years so time for update. Long term rough running and low power finally had to be addressed.
I had compression tests done last year which found one cylinder with tight exhaust valve clearance and low compression. Re-setting tappet did not solve this, so knackered valve suspected.
Nothing for it but to book in head refurb, and finally got it done last month.
Heads came off for unleaded seats, new valve guides, new exhaust valves and new rocker shafts.
All top end parts and fittings cleaned up and re-painted.
Took opportunity to fit 6 new injectors too, plus new radiator and header tank (old one developed seep when disturbed).
Shiny bits look nice:
But what is most interesting is the state of the exhaust valves, here's the worst one that caused the compression loss. Very pitted, no wonder it didn't seal.
Injectors came out looking grimy but generally OK bar number 6, on which the nozzle has disappeared up the spout, very weird. Must have been hosing fuel in this one because you can blow straight through it. Normal injector opening pressure is about 40psi so gawd knows how it was running on this cylinder.
ANYWAY, after all this the running and general performance is back to normal, hasn't driven like this for years.
