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Changed cylinder head..engine now running terrible.
Posted: 20 Oct 2008, 08:34
by katykoo
Have had a head put on ..can't work out why its not firing properly. All four sparks have good sparking..but doesn't appear to be running fully and sounds like a bag of nails. Tappets have been adjusted, and so on..help any ideas folks..?
Thanks
Posted: 20 Oct 2008, 08:57
by Ian Hulley
What engine are we talking of ?
Ian.
Posted: 20 Oct 2008, 09:50
by Red Westie
Dito...engine type?
But my money is on a partially open valve and no compression.
Martin
Posted: 20 Oct 2008, 10:16
by Therunner
I think she has a 2.0 cooled
Melvin
Posted: 20 Oct 2008, 10:49
by Ye Olde Syncrospares
push rods not located on lifter properly?valves not adjusted correctly?plug leads wrong way round?air leak on balance pipe? thats a start,cj.
Posted: 20 Oct 2008, 10:57
by katykoo
Thanks guys..
its a CU 82 air cooled 1970cc
if its a partially open valve what will that mean?-what needs adjusting?
Posted: 20 Oct 2008, 11:04
by katykoo
The heat transferer pod had to be taken off btw, and isn't back on the heat exchangers etc?
Does that make any difference?
I expect not.. The guyt working on it, says it needs welding back on..
Posted: 22 Oct 2008, 19:06
by Laurie
It sounds as if a push rod isn't inserted properly (very common mistake)
I'd remove plug leads in turn to find culprit and then turn to firing tdc on that cylinder, then loosen that rocker shaft to see if I could lift the far end of either rod slightly and centralise it in the follower.
Did you adjust the tappets after fitting the new heads? If not, you need to find out if they are hydraulic or have been changed to solid.
New heads often advise missing out the head shims which means that the tappets will change.