Just the wrong time of year, suns a shining you should be out in the van not stuck with your head under the bonnet ?Latest update on the compression:
cylinder 1 - 125
cylinder 2 - 90
cylinder 3 - 120
cylinder 4 - 75
Looks like the head's going to have to come off sometime in the future.
ohhhhhhh dearThink I've found out why the van has not been running too well. I did a compression test and these are the results......can you spot the difference?
Cylinder 1View attachment 44999
Cylinder 2View attachment 45000
Cylinder 3View attachment 45001
Cylinder 4View attachment 45002
It could be a tight tappet or a burnt valve: as no water has been used, the oil has no signs of mayonnaise at the cap and I've run it on LPG I would think I've burnt a valve.
Assume we are looking at heavy cam wear/scoring. Your prognosis seems to fit the bill. Whatever caused the scoring might have at some point entered the cylinder so I presume head off next.Cylinder no.3 you can see one or two marks.
View attachment 46515
But the scoring seems to go right the way round the bottom on this cylinder.
View attachment 46516
The adjacent cam looks in fine condition.
View attachment 46517
Maybe totally wrong here, and please don't hold back if you have a better explanation, 2 & 4 cylinders were always the low compression and yet, on investigation, 1 & 3 seem to have been the damaged ones. My conclusion is 1 & 3 cylinders have had the valves replaced and whatever work was needed to get it on the road again and 2 & 4 were just left alone hence the low compression now on those cylinders.
Hello Eric,Assume we are looking at heavy cam wear/scoring. Your prognosis seems to fit the bill. Whatever caused the scoring might have at some point entered the cylinder so I presume head off next.