Terry, Thanks for all your help. Appreciated. Will go home and have a squiz again. Happy easter dude,
Dave >>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<< On 3/30/02, 1:31:25 PM, "Terry Rudd" <[EMAIL PROTECTED]> wrote regarding RE: L24 troubles. Please help (Safe Easter): > David, > You done everything correctly as those markers on the cam timing wheel and > the thrust plate just don't line up if it's out. OK, what's causing valves > to hit. The only thing that comes to mind is the head has had more than the > prescribed amount shaved off it as most 6 cyl engines aren't as tolerant of > this as the 4 cyl i.e. the cam dial in tolerance isn't as great. A 4 banger > usually wont hit the piston +-1 tooth but a 6 usually does, this is why you > must rotate a OHC engine by hand thru 720 degrees before hitting the > starter. Bent valves are usually pretty obvious, well all the ones that I've > done/seen were. The guides will usually split before a valve actually bends. > A fair indication that you have valve and/or guide damage is to remove the > collets and see if the valve travels freely through the guide. It will be > very sticky if the valve or the guide is damaged. Exhaust valves wont trap > air in the guide like an inlet valve does so I guess the H2o method is good. > One last thought, has this engine got high top pistons ala Zed engine? I > just might be on the money if it has. Valves can stretch, not much and > retainers can distort also, but you'd have to be so unlucky for this to have > happened. > I'm outa here for a couple of days, so over to Steve for further help. > regards > Terry (Happy and SAFE Easter everyone) > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of David Andrews > Sent: Saturday, 30 March 2002 12:17 PM > To: [EMAIL PROTECTED] > Subject: Re: L24 troubles. Please help > Ahhh the joys. > Steve, Yes #1 was at TDC with the lobes both pointing upwards (ie > compression) and the distributer was pointed to spark number 1 so i > assumed that this was where its sposed to be. > Terry, I had a look through the cam sprocket and saw that the two marks > you described lined up perfectly with number 1 at TDC compression. I have > since pulled the head off and have found two very light scrapes from > exhaust valves on pistons 4 and 5 but none anywhere else. This fits with > the noise that I hear as it only seems to come from that area.. ie is not > uniform across all cylinders. > Now given that the two timing marks you mentioned DO align up correctly... > and that I am fairly confident the chain didn't slip a crank sprocket > tooth. What on earth would cause it to knock valves (only lightly i > hope/think) only on #4 and #5 ?!. Beats me. > Oh and while i'm hear is there anyway, short of paying someone money, to > be more confident that exhaust valves are not totally bent with the head > off?. Sit it upside down and pour some water in there? And come back in > the morning and see if its drained through?. I dunno. > Any help much appreciated, > Happy Easter and as Telstra have changed all their broadcast stations > names to: "Drive Safe". > Dave > >>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<< > On 3/29/02, 7:09:57 PM, Steve Lamb <[EMAIL PROTECTED]> wrote > regarding Re: L24 troubles. Please help: > > >distributer were in the position to fire number 1. I assumed that this > > >was TDC on the compression stroke. I then white-outed marks to match the > > This may have been your mistake. Did you check that #1 piston was at > > TDC on the compression stroke before removing the head ?? --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
