MID RANGE POWER LOSS
- Thread starter george
- Start date
Plenty of torque on acceleration below 3000rpm in each gear, even in 5th from 30 mph, so compression must be ok, it's just when over 3000rpm engine is flat. On longer runs on motorway (20miles plus) the engine plays up with jerky running when cruising. Engine stalls on slip road exit which have put down to smoking that chokes engine. Starts up again straight away, emits smoke then seems flat with jerky running. notsure.gif
When starting from cold emits smoke for 100 yards then runs smoothly with plenty of torque upto 3000rpm in each gear. It's when the engine gets hot it deteriorates. Temp gauge fairly constant at 80+ but occasionally moves up briefly to 100-on motorway but falls back presumably when thermostat kicks in. :?
Still have to fix egr blanking plate. Managed to loosen egr 13mm bolt with ring spanner but it took a lot of force on bolt nearest engine, was a bit worried head would shear off. :roll:
When starting from cold emits smoke for 100 yards then runs smoothly with plenty of torque upto 3000rpm in each gear. It's when the engine gets hot it deteriorates. Temp gauge fairly constant at 80+ but occasionally moves up briefly to 100-on motorway but falls back presumably when thermostat kicks in. :?
Still have to fix egr blanking plate. Managed to loosen egr 13mm bolt with ring spanner but it took a lot of force on bolt nearest engine, was a bit worried head would shear off. :roll:
Well its a month on and finally blanked off the EGR valve 2 weeks ago with the following results:-
1- engine has stopped missing and stopped stalling, put this down to smoking exhaust not being recirculated and chocking engine.
2- about a 10% reduction in fuel economy but well worth it to have a drivable motor. cheers.. cheers.. Vocky
Also, the long term internal water loss, reason never diagnosed, cured by using a seal up additive.
Now 1 month without having to top up.
This leaves the smoking problem. Heavy smoking on cold start up and first 100 yards then after engine overrun after breaking on engine especially after down hill run. Can go for periods when not smoking much if revs kept below 3000rpm. Accelerating above 3500rpm leaves plume of smoke :evil: :evil:
So suspect valve stem oil seals. Engine fairly smooth when cold but diesely sounding when hot. So what next Vocky?? notsure.gif notsure.gif
1- engine has stopped missing and stopped stalling, put this down to smoking exhaust not being recirculated and chocking engine.
2- about a 10% reduction in fuel economy but well worth it to have a drivable motor. cheers.. cheers.. Vocky
Also, the long term internal water loss, reason never diagnosed, cured by using a seal up additive.
Now 1 month without having to top up.This leaves the smoking problem. Heavy smoking on cold start up and first 100 yards then after engine overrun after breaking on engine especially after down hill run. Can go for periods when not smoking much if revs kept below 3000rpm. Accelerating above 3500rpm leaves plume of smoke
:evil: :evil: So suspect valve stem oil seals. Engine fairly smooth when cold but diesely sounding when hot. So what next Vocky?? notsure.gif notsure.gif
So what is best way to replace valve stem oil seals - head off or special tool method for holding valves in place without head removal? Presumably 2nd method cheaper and quicker saving on head gaskets and time? notsure.gif notsure.gif
Has anyone tried 2nd method? Is it a special vauxhall tool? dunno..
Has anyone tried 2nd method? Is it a special vauxhall tool? dunno..