labrat Posted March 12, 2002 Share Posted March 12, 2002 Ok, here's the deal. I had a blown headgasket on my motor (which explains the vibration problem i've had) and have both heads off and at the machine shop. upon looking a little closer, the cylinder walls don't look that bad. No ring groove at the top to speak of, just a little smooth, with no grooves or anything big enough to catch a finger nail. I know this needs some crosshatching, and i've been getting a little smoke out of my breather, so i know i'm getting some blowby. My question is: Is there any way to reseat my rings and restore my "rough" cylinder walls without pulling the pistons? The motor is still in my 280ZX, and i can't pull the pan with it in there. There just isn't enough room between the pan and crossmember. If i had a hoist, i'd just pull it out, but i don't... My thoughts were to use a cylinder hone on on cylinder at a time, then turn the motor over and flush the S*%T out of them with light oil to remove the metal shavings, but i'm worried about what this will do to the motor when i start it up. any thoughts on this? All help is, as always, greatly appreciated! Bill Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 12, 2002 Share Posted March 12, 2002 buy or borrow or rent an engine hoist and do the job correctly, if you try honeing the cylinder walls with the pistons still in the cylinders you can,t help getting some metalic dust/crud in under the rings no matter how carefull you are and that will eventually screw something up as that metalic dust embeds in the piston skirts ,bearings ETC. besides the rings will not reseat correctly anyway and if your getting blow-by its probably time for new rings and bearings while you have it apart anyway. Quote Link to comment Share on other sites More sharing options...
labrat Posted March 12, 2002 Author Share Posted March 12, 2002 Thanks for the input, grumpy! I knew someone here would stop me before i really screwed something up! This motor has to be back together and driving me to work on thursday, so i don't think i will be able to do what really needs to be done, i was just hoping for a quickie solution, i guess. All this started out as a simple headgasket job, then turned into "While i'm there...." At least i will have a good valve job, and running on all 8 cylinders. Headgasket was blown between 3&5, so those two cylinders were completely dead... Not to mention the two valves burnt up. Hopefully this will keep me running for a while. Might just buy a shortblock. now that i have good heads. btw grumpy, you can ignore my similar post on chevytalk, i was just looking for a quick response... Bill Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 12, 2002 Share Posted March 12, 2002 btw grumpy, you can ignore my similar post on chevytalk, i was just looking for a quick response... TOO LATE!!! I already put the same answer over there! Quote Link to comment Share on other sites More sharing options...
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