I always like to follow other members projects and have learnt a lot from these. I'm certainly no mechanic but will always have a go at anything so any advise will be gratefully received.
Had a busy weekend so I didn't get much done apart from engine out and top end stripped and checked.
Looks like its been leaking oil into the cylinders 1 & 2, possibly through the stem seals
3 & 4 look okay.
Valves out. It looks as if the inlet valve seals on 1 & 2 are the culprits as there is a good build up of oil around the valve seat.
Although I checked the valves and guides the first time that the engine was apart I can't find the dimensions that I recorded at that time so it's back to measuring it all again
First valve stem diameter and then the stem run-out
Valve guides were next. Only issue I had was my bore gauges only go as low as 8mm.
Picked these up cheap. Not brilliant but good enough to record a decent dimension.
Checked each guide throughout the entire length and measured the gauge with a micrometer.
Don't know if this is the correct method but the manual says that this dimension needs to be checked by "your local dealer", so its the best its going to get seeing as my local dealer went out of business years ago. I'm sure it won't be far short of what a dealer would do however I do stand to be corrected by the experts here who know far better than me.
Inspected the cams and measured the journals and lobes. Got the Plastigauge out to measure the wear on the cam cap bearings. Fantastic stuff and really easy to use.
Pop the cam cap back on and torque down to correct setting.
Remove caps and using the gauge supplied determine what the clearance is on each bearing shell.
Simples
If I'm doing wrong let me know.
The following dimensions are valve stem diameter, valve stem run-out, valve guide diameter, cam bearing top & cam bearing bottom. The only one that really concerns me is the inlet 4 valve guide diameter. I may have to go back to this and check it again to make sure that the dimension is correct. As there are no tolerances to go by for the valve guides in the Clymer manual does anyone know if these look okay?
IN 1 - 6.97 - 0.01 - 7.01 - 0.050 - 0.050
IN 2 - 6.97 - 0.01 - 7.01 - 0.050 - 0.050
IN 3 -6.96 - 0.00 - 7.02 - 0.050 - 0.050
IN 4 -6.96 - 0.01 - 7.15 - 0.050 - 0.050
EX 1 -6.96 - 0.00 - 7.01 - 0.050 - 0.050
EX 2 -6.96 - 0.00 - 7.01 - 0.050 - 0.038
EX 3 -6.965 - 0.00 - 7.01 - 0.063 - 0.050
EX 4 -6.96 - 0.01 - 7.01 - 0.063 - 0.050
Cam
IN 24.47 -
IN 24.47 -
IN 1 - 36.29
IN 2 - 36.29
IN 3 - 36.30
IN 4 - 36.28
EX 24.47 -
EX 24.47 -
EX 1 - 35.79
EX 2 - 35.79
EX 3 - 35.79
EX 4 - 35.77
Cams all seem to be within tolerance and no signs of wear.
Run-out on head and barrels was a bit hit and miss as I don't possess a decent 18 inch straight edge. I borrowed our calibrated test square from work but it is only 14 inches long so I couldn't be sure on this one. Is there anyone in the Southampton area who has one that I could borrow?
The edge does rock on the cam chain tunnel in the centre and creates a gap large enough for a 0.051 feeler blade to pass under when checked at one end. The two individual sides of the head are completely flat so it is just the issue with the centre. Can I get away with this amount of warp/run-out or does it need to be skimmed?
HEAD 0.051 -
CYLINDER 0.00 -
Wiesco 1075 fitted. Bores seem okay as well to these dimensions.
1 72.01 - 71.97
2 71.98 - 71.99
3 71.98- 71.97
4 71.98 - 72.00
