I 'suspect' you could remove a small amount of metal from the cam bearing caps and have someone align bore or align hone the journals if the damage isn't to severe.
Announcement
Collapse
No announcement yet.
Cam journal wear
Collapse
X
-
Forum LongTimerBard Award Winner
GSResource Superstar
Past Site Supporter- Jul 2005
- 15152
- Marysville, Michigan
I haven't done any sort of rework like you are asking.
I 'suspect' you could remove a small amount of metal from the cam bearing caps and have someone align bore or align hone the journals if the damage isn't to severe.
-
yes, that's what I'm thinking, that is a common fix in places like Africa for mains on engine blocks and it works fine.
Or even replace with removable shell bearings.
Another possibility might be to line bore and replace the whole lot and then bore again back to size.sigpic
Don't say can't, as anything is possible with time and effort, but, if you don't have time things get tougher and require more effort.
Comment
-
Forum LongTimerBard Award Winner
GSResource Superstar
Past Site Supporter- Jul 2005
- 15152
- Marysville, Michigan
When they were poring babbitt bearings back in the twentys and thirtys. The common fix for those, after you removed the last shim from the main cap, was to file the cap and hit the babbitt with a bearing scraper.
Every self respecting old time engine builder used to have a main bearing file and a scraper which were only used for that sole purpose.
Comment
-
Originally posted by rustybronco View PostWhen they were poring babbitt bearings back in the twentys and thirtys. The common fix for those, after you removed the last shim from the main cap, was to file the cap and hit the babbitt with a bearing scraper.
Every self respecting old time engine builder used to have a main bearing file and a scraper which were only used for that sole purpose.
I believe that its still done on marine engines in ships where ist impossible to get borers into the spaces so its still done by hand and those are huge bearings.sigpic
Don't say can't, as anything is possible with time and effort, but, if you don't have time things get tougher and require more effort.
Comment
-
jhillier449
Tkent02:
You are on da money.!!!!!!!!!!
The rest of the journals are in good shape.
To bad these heads are not like a KZ1000 head, bearing shells.
Wonder if you could bore the journals for shells?
Comment
-
Originally posted by jhillier449 View Post
Wonder if you could bore the journals for shells?
Really they last forever if they don't run dry.
Comment
-
Forum LongTimerBard Award Winner
GSResource Superstar
Past Site Supporter- Jul 2005
- 15152
- Marysville, Michigan
Had another thought...
Remove the buckets, oil the journals in the head, hold a bit of 1000k crocus cloth around the camshaft, rough side down, and lightly 'dress' the high spots. The cam resting in the head should provide good alignment for polishing down any high spots.
Check often with plastigage and go slow.
Comment
-
With the spark plugs out and valve cover off hit the starter and make sure oil is flowing at a good rate and evenly.1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
1985 GS1150ES stock with 85 Red E bodywork.
Comment
-
Footy.
In my opinion after forty odd years in engine reconditioning, and hand scraping many such "pick up" areas of cam bearing housings, your pics indicate an "out of line" issue.
Any oil starvation would leave signs of tearing all around the housing, as would contamination. The position of the damage to one side of the cap is indicative of the cap being out of line with the head.
As has been said, the caps are in line bored. Could be the caps are mixed up? ( They are mated A for A, B for B etc) Perhaps an odd cap from another motor, or the dowels are missing or are not a good fit?
From your pics, the damage could be fixed by hand scraping provided there is no other damage to the cam/head. You do need to check out the alignment issues to try and find out why it happened.
Footy.
Comment
-
jhillier449
Footy:
Thanks for the insights. The head is a used one I bought as a spare and am in the process of fixing it up to swap out with the one that is on my 80 1000G now. I am using the cylinder block that came with the head as well, quick swap and I am back on the road. The cam caps were in the right places when I took the cams out, but who knows what happened in the last 30 years.
Comment
-
Dreef1999
Originally posted by tkent02 View PostI will guess the two cam caps on the right side are the two with the damage?
I think it is from letting the engine idle a long time on the side stand.Originally posted by Footy. View PostIn my opinion after forty odd years in engine reconditioning, and hand scraping many such "pick up" areas of cam bearing housings, your pics indicate an "out of line" issue.
Any oil starvation would leave signs of tearing all around the housing, as would contamination. The position of the damage to one side of the cap is indicative of the cap being out of line with the head.
how long is too long to idle on the sidestand?
Comment
-
Footy.
Originally posted by Dreef1999 View Postit strikes me that tkent has made a scientific hypothesis and prediction which was confirmed. Therefore his believed cause should be recognized seriously.
how long is too long to idle on the sidestand?
Of course slight oil starvation would effect the tight spot first, and as the owner has pointed out the history of this head is unknown.
Footy
Comment
Comment