Valve Bucket polishing tool

Message

azcannon · #1 Post by **azcannon** » Wed Dec 28, 2005 4:21 am

Hey I have been beating my head against a wall trying to figure out how to get the valve buckets to slide smoother in the head ad I already shim all the springs in my head and have been polishing the slides with a dremel and polishing compound but I have made a 10 dollar tool that worked amazing and really made a Difference...... 3/4" pvc with a wrap or two of tape and half a piece of DA sandpaper ( adhesive backing ) I just insert and spin and change paper started with 220 then 500 and it made the exhaust buckets slide smooth and only takes off the high spots and WOW what a good feeling when putting a cannondale head together. Goes perfectly around the guide and leaves it looking beautiful. Maybe you have all been doing this all along but this is my first time and what a relief to find a easy way to tune these up.

iceracer17 · #2 Post by **iceracer17** » Wed Dec 28, 2005 11:24 am

great idea,i'll be trying it out soon!

cannondale27 · #3 Post by **cannondale27** » Wed Dec 28, 2005 12:20 pm

I just try to touch area that is sticking.Otherwise Timbo gets the job.Its a good idea you have there but the tolerances manual calls for cant be held in such a manner

azcannon · #4 Post by **azcannon** » Wed Dec 28, 2005 2:46 pm

A new bucket for me is a pretty good indicator or clearance, I can almost guess at things like crank endplay and have a couple of dial indicators to back that up , I just can't accept a tight bucket on teh exhaust side after replacing a head from a broke valve and I know it will get shot down but that is my reason for increased cam wear that and oiling issues. I will run this motor for twenty hours and check it

cannondale27 · #5 Post by **cannondale27** » Tue Feb 07, 2006 12:19 am

Stay tuned to this subject.I may have been wrong in advising against doing this.

Exodus · #6 Post by **Exodus** » Tue Feb 07, 2006 5:35 am

Thats a tight fit. What causes the buckets to stick in the frist place? Lack of oil, overheating?

Exodus · #7 Post by **Exodus** » Tue Feb 07, 2006 5:37 am

Would it be possible to put a steel liner in around the bucket to keep it matched without worry?

iceracer17 · #8 Post by **iceracer17** » Tue Feb 07, 2006 11:34 am

I would say it's from both.From the expansion of the aluminum which causes too tight of a tolerance for the oil to get down.Just my .02 though.

cannondale27 · #9 Post by **cannondale27** » Tue Feb 07, 2006 12:20 pm

Yes not sure what is going on there.May just be a case of to tight of tolerance right from factory.Thing is the aluminum does get bigger faster than bucket when hot.Maybe not soon enough though.

Hacksaw830 · #10 Post by **Hacksaw830** » Sun Sep 13, 2009 2:55 pm

Just wondering how your PVC pipe with sandpaper worked out on the valve buckets? Ive got a low hour engine torn down and the exhaust buckets are sticking. I would love to send it to Timbo but I would like to get this thing back together in the next week or two.