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4 Posts
New to this forum but have read lots of expert advice in here so would like to see if someone could help on getting the right new piston and rings set.
Last year I bought a 1991 Trailboss 350l not running and found it to have a stuck piston and also when disassembling the crank and connecting rod bearings were completely gone. Also found that the piston was 0.20 oversized.
Since then I have had a new BRONCO connecting rod and bearings pressed in at an engine shop as well ordering some new bearings for the lower end recently.
What I am trying to determine now is------
1) what size piston and ring kit should I get and how much clearance should there be between the piston and the cylinder wall?
2) When I insert rings into the cylinder wall,how much end gap clearance should I have on each?
P.S. I will soon be honing the cylinder and will take all measurements after.
Also I saw on the downloaded Polaris manual where it has several different sets of numbers for the (91-93) trailboss (one set under the other) and just dont get why?
If you check at page 7.3 and on side scoll bar the number is 227 ---ENGINES and title 1991-93 ENGINES AND SPECIFICATIONS you can see these numbers
http://gh-ftp.com/ORV Manuals/Polar... - 1995 Polaris All Models Service Manual.pdf
So Thank you in advance for any help you can offer and hope to hear back from someone soon.....
Last year I bought a 1991 Trailboss 350l not running and found it to have a stuck piston and also when disassembling the crank and connecting rod bearings were completely gone. Also found that the piston was 0.20 oversized.
Since then I have had a new BRONCO connecting rod and bearings pressed in at an engine shop as well ordering some new bearings for the lower end recently.
What I am trying to determine now is------
1) what size piston and ring kit should I get and how much clearance should there be between the piston and the cylinder wall?
2) When I insert rings into the cylinder wall,how much end gap clearance should I have on each?
P.S. I will soon be honing the cylinder and will take all measurements after.
Also I saw on the downloaded Polaris manual where it has several different sets of numbers for the (91-93) trailboss (one set under the other) and just dont get why?
If you check at page 7.3 and on side scoll bar the number is 227 ---ENGINES and title 1991-93 ENGINES AND SPECIFICATIONS you can see these numbers
http://gh-ftp.com/ORV Manuals/Polar... - 1995 Polaris All Models Service Manual.pdf
So Thank you in advance for any help you can offer and hope to hear back from someone soon.....