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#42416 08/15/2002 2:10 PM | Joined: Feb 2001 Posts: 92 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2001 Posts: 92 | I am as excited as a little girl! I get to put my engine back together finally. Now comes the hard part for me though, I have to take my time! I am trying to be patient and smart so I am going to ask some questions that I cant find answers for in my Maintenance manual.
1) My manual states that the compression ring for my 270 should have a beveled edge on the inside top of the ring and the B and C grooves should have tapered rings. My ring set is just the opposite. I have 6 straight rings marked for FIRST GROOVE and 12 beveled edge rings marked for SECOND GROOVE. Can anyone clarify?
2) How should the ring gaps be oriented to one another? 180 degrees off from each other, 90 degrees, .... ?
3) Is there any problem lubing up the connecting rod bearing and Drive shaft jornal? Can/should both sides of the bearing be lubed?
As you can see I am trying to get my pistons in and I have the questions that I cannot find answers to. If you have any other tips, I would love to hear them.
Thanks,
Tom
Whats down in the well comes up in the bucket, so watch who's KoolAid you drink.
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#42417 08/15/2002 4:49 PM | Joined: May 2002 Posts: 44 'Bolter | | 'Bolter Joined: May 2002 Posts: 44 | Tom, The top compression ring that you have may have a stamped dot or other marking to indicate which side goes up, otherwise as long as it is the rectangle type it should not matter. If the bevel your rings have is on the inside of the ring, the #2 and #3 piston rings should have the bevel or notch on the upper side when installed. The manuals all show ring designs typical of the 1950's and 1960's and any new designs will work just fine. Check out this link for some good info: http://www.hastingsmfg.com/service_tips.htm As far as ring gap orientation I would recommend evenly spacing the gaps around the piston just so that no two gaps are in line with each other. DEFINETLY lube up the connecting rod bearings (and all other bearings) with a good engine assembly lube so that during the initial startup they are happy. No need to lube the connecting rod journals that the bearings fit into. Just be sure to wipe them clean and make sure that there is no dirt on them that might get pinched between the journal and the back of the bearing half. Hope this helps.
"The Operation of GMC trucks is normally smooth and steady, with no loud rattling, knocking or unusual noises. A good driver will quickly become accustomed to driving a GMC truck and will get the feel of his vehicle regardless of his engineering knowledge."-TM10-1563
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#42418 08/16/2002 2:07 AM | Joined: Mar 2001 Posts: 327 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Mar 2001 Posts: 327 | Just don't put any of those gaps over the piston pins. Looking good so far-go slow.
Oly in Oregon Rest in Peace1945 GMC COE Victory Truck 1953 Willys CJ3B 1955 Chevy 1st series 3/4-ton 1958 WIFE Last series Never say "Whoa" in a mud hole
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