Update, put it back together it smoked worse than ever significant amount of oil out the tailpipe. oil remains puddled up on the top of cylinder #1 after shutdown. It's like it has oil injection.
I took the head off and replaced it with a known good stock head. lots more ticking noise but no change in oil problem the car is like a mosquito fogger now. I am pretty confident now it is oil getting past the rings but it still has good compression and there is no blowby or pressure in the oil pan or top of or crank case. any other time I've seen oil getting past the rings this bad the reason why was obvious. usually really damaged pistons and rings gummed up and stuck. Looks like I'm going to miss FM open house :-( Bob ----- Original Message ----- From: "Bob Bundy" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, August 05, 2008 6:55 PM Subject: Re: Tailpipe smoking under load. > I'm giving up on determining for sure that I know what was causing the > issue. I'm just going to put it back together and hope for the best. > > The machine shop couldn't find anything really wrong with the head. They > were pretty sure it looked like the guide seals were leaking quite a bit > but > couldn't determine why. they were replaced once again. I can't find > anything > out of order with the pistons rings or cylinder walls either. The only > major > issue was the #1 rod bearing was bad but not so bad it was loose or > spinning > the bearing. > > I'm completely stumped. > > Bob > > > ----- Original Message ----- > From: "Bob Bundy" <[EMAIL PROTECTED]> > To: <[email protected]>; "Eric Schieb" <[EMAIL PROTECTED]> > Sent: Thursday, July 31, 2008 7:30 PM > Subject: Re: Tailpipe smoking under load. > > >> The whole thing started when I burned a hole in one of the exhust valves >> on >> track so yes I definatly had some detonation then I think. I have no Idea >> why 5 track days nemerous autocrosses and a fair amount of road miles on >> it >> and it burned a hole in the exhaust valve on the front straight of PIR >> with >> no prior warning of anything out of order just went 1 hole down. >> >> Valves were replaced all valve seals were replaced, head was checked out >> by >> the machine shop and injectors were replaced but I have had this >> smoking/oil >> issue ever since. bottom end wasn't pulled apart originally because their >> was no evedence anything was out of order with it. I don't see any knock >> now >> and I have also had it on a dyno and it ran strong with no knock and >> plenty >> safe AFR with some oil smoke althoug not as bad as some of the Hondas >> that >> were dynoing on the day. >> >> Now the machine shop that the head is at now tells me they can't find >> anything wrong with the valve guides. I can't see anything that looks >> like >> a >> problem with the rings, pistons, or cylinder walls. Only that my #1 rod >> bearing is shot but it looks like it wasn't so bad that it hurt anything >> else. >> >> How is it that I'm getting oil burning in the #1 cylinder? This has me >> stumped. Symptoms and evidence aren't agreeing real well. >> >> Bob >> >> ----- Original Message ----- >> From: "Eric Schieb" <[EMAIL PROTECTED]> >> Cc: <[email protected]> >> Sent: Thursday, July 31, 2008 10:34 AM >> Subject: Re: Tailpipe smoking under load. >> >> >>>I am not sure if my first note went through but . . . >>> >>> The bits on the piston reinforces the idea that the rod bearing >>> hammering is due to detonation caused by the oil in the cylinder. >>> Takers on the theory? >>> >>> Eric Schieb >>> >>> Bob Bundy wrote: >>>> No none, there were some marks I think that were from the bit of the >>>> porcelain that broke off the tip of spark plug. very small pits that >>>> were >>>> cleaned up. >>>> >>>> Bob >>>> >>>> ----- Original Message ----- >>>> From: "Rob Ebersol" <[EMAIL PROTECTED]> >>>> To: "Bob Bundy" <[EMAIL PROTECTED]> >>>> Cc: <[email protected]> >>>> Sent: Thursday, July 31, 2008 6:30 AM >>>> Subject: Re: Tailpipe smoking under load. >>>> >>>> >>>> >>>>> Any valve marks in the piston tops? >>>>> >>>>> On Jul 31, 2008, at 2:48 AM, Bob Bundy wrote: >>>>> >>>>> >>>>>> Pulled the engine the other night, took the intake and exhaust off >>>>>> and >>>>>> pulled the head. >>>>>> >>>>>> Again both intake valves on cylinder #1 were completely wet with oil >>>>>> on >>>>>> the intake side of them, actually puddle up a little, also Oil >>>>>> streak >>>>>> down one of the valves on the exhaust side of cylinder #1. All other >>>>>> cylinders looked perfect. Top of piston and cylinder walls look fine >>>>>> to >>>>>> me however I can see minor streaks in the cross hatching but nothing >>>>>> that you could feel. Head got dropped off at a local machine shop >>>>>> (Skagit Cylinder Head) he will pull it apart and look at it tomorrow >>>>>> morning. >>>>>> >>>>>> Took the pistons out tonight. Absolutely no evidence of any ring >>>>>> issues >>>>>> that I could see. A glaring issue did show up however, #1 rod >>>>>> bearing >>>>>> is >>>>>> hammered. bits of it were stuck in the oil pickup screen. not a mark >>>>>> on >>>>>> the rod journal that I can determine however. nothing else seems >>>>>> excessively warn either and all the other bearings look fine. >>>>>> >>>>>> Bob >>>>>> >>>> >>>> _______________________________________________ >>>> Miatapower mailing list >>>> [email protected] >>>> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >>>> >>>> >>> >>> _______________________________________________ >>> Miatapower mailing list >>> [email protected] >>> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >> _______________________________________________ >> Miatapower mailing list >> [email protected] >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
