Engine exploration...., Is this engine any good? |
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Engine exploration...., Is this engine any good? |
bostonmeche |
Jul 31 2004, 03:27 PM
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#1
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1974 914-4 (some day a Suby conversion) Group: Members Posts: 39 Joined: 30-December 02 From: Easton, MA Member No.: 44 Region Association: North East States |
Hi all,
Well after pulling the engine several weeks ago and asking retarded questions about push rod tubes, and oil geysers, I done n pulled the cylinder head off of #3 and #4. Having done this I was finally able to learn some things. 1. My cylinders are 96mm in dia and 76mm stroke, (I get 2.2L) Yeah! (IMG:style_emoticons/default/driving.gif) 2. My engine doesn't look like the prestine engines I see on all the Discovery Channel TV shows like Rides and Overhaulin. (IMG:style_emoticons/default/sad.gif) So my questions to those who know. 1) Is it normal to have all this black cryosote (sp?) looking stuff all over the pistons and valves? 2) Should I just put this thing back together and quietly walk away and call the engine toast? or should I clean all the crude off and try and put it back together? 3) My compression numbers are: Cyl #1 100 Cyl #2 85 Cyl #3 100 Cyl #4 75 4) Is this engine worth fix'n?? Attached thumbnail(s) |
bostonmeche |
Aug 1 2004, 06:16 AM
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#2
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1974 914-4 (some day a Suby conversion) Group: Members Posts: 39 Joined: 30-December 02 From: Easton, MA Member No.: 44 Region Association: North East States |
So I think the general concensus is to:
1. Clean everything up (hot tank?) 2. Scrap all the crude off 3. Hone the cylinders 4. Put new rings on the pistons markd, The engine is fed by dual Dellorto 40's and even has anodized blue roller rockers. I actually have a 76mm stroke, though I have to admit, I hear almost no one talk about using a 76mm stroke, usually, 71 or 78. I'm starting to wonder if I measured wrong. BTW I added my location. Brad, Are 48x38 valves a good thing, bad thing, or just something to know? I'm still too green to understand what that implies, especially since I have no idea what is stock. Also are head gaskets bad in this case? Should I replace them or just leave them out (the edges of the gaskets are cut up)? If I throw them out what keeps it from leaking (not that the gaskets did either)? If I leave them out, it will affect my compression correct? You mentioned compression not being calculated correctly, is that because you assumed the rings were good and the #s were bad or was there something else that led you to believe this. Should I grind the valves too? I don't even know exactly what that means. What parts of them am I grinding? Are these things DIY operations (ie, honing cylinders, grinding valves)? Or do I need to find someone in the Boston, MA area to do it? Also, when I put new rings on how do I know what size to order? Do I base the size on Cylinder dia or by Piston groove? I just looked on pelican for rings $50/cylinder. Is that normal? I mean these are just flat sheet metal parts aren't they? If you couldn't tell, the only engine I ever took apart was a Briggs & Stratton back in high school. So I appreciate all time you guys take to reply to what must seem to be pretty mundane if not common knowledge type of questions. (IMG:style_emoticons/default/pray.gif) Wow did I write a lot! If you actually got through it all (IMG:style_emoticons/default/beer.gif) |
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