Eli, good call, something I would not have immediately done. I'm assuming that when Sal said the valve was "beaten bad", he meant the top, not the seat. If that is the case, don't forget to check the rocker and the push rod. Make sure the push rod was of the correct length, all part of doing a top and I'm sure your guy did this. Don't just toss parts at it, check to see what was the cause. Poke an eyeball in and look at the cam lobe, too.
Al DeMarzo Visit the Ercoupe Swap Page Free, Easy and No Membership Required http://www.ercoupeowners.com/swap/swapbook.htm ----- Original Message ----- From: [EMAIL PROTECTED] To: [email protected] Sent: Monday, May 05, 2008 8:59 AM Subject: RE: [ercoupe-tech] Grounded Well, the jury is out, in my specific case. Like promised, Sal (the cylinder man from Prosper, Texas) called me at 7:45 AM this morning and told me the exhaust valve was "beaten bad". Told me I need to check the hydraulic lifter, then check valve clearance. I am thinking just to drop in a new hydraulic lifter, before checking valve clearance. Sal also told me, in this specific case, we made the right decision in pulling out the cylinder. Eliacim > > Actually Continental has a separate orfice that is used to calibrate the > standard compression testers (which do have an orfice) > > Here is link to the Cont svc bulletin : > http://www.sacskyranch.com/SB03-3.pdf > > Note that I was in error, if you have some valve leakage but the > compression leakdown is within the limit set by the Continental calibrated > orfice you are still good to go. > > Basically Continental says that at the higher pressures created by > combustion the smaller leaks seal them selves, and if a borescope > inspection does not show abnormalities and leakdown is within THEIR limits > you are good to go. > > In real life, I usually pull the cylinder if it has valve leakage or oil > blowby > > > > Bill > > > To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Sun, 4 May > 2008 16:30:09 -0700Subject: Re: [ercoupe-tech] Grounded > > > > > > Al just a quick note from an A&P.. Leakeage from an intake valve is not > considerd to be fatal since the incoming fuel will cool the valve, > leakaage past the rings will burn oil and increase crankcase pressure, but > a leaking exhaust valve will continue to destroy the valve since the hot > gas will continue to errode the valve face.. Thats why most mechanics > will pull a cylinder if an exhaust valve is leaking during a compression > test . We have your safety uppermost in mind , losing a exhuast valve in > flight would spoil just about anybody's day. By the way, all compression > testers have a calibrated orrifice. > > Tom A&P/IA Couper3938H > > DeMarzo <[EMAIL PROTECTED]> wrote: > > > > Oh man! You using Sal for the cylinders? > > Your mechanic should have a calibrated orifice to check compressions. > Continental says that compressions to 40 should be okay and that the > combustion chambers and valves should be checked with a borescope when > they're low. Any good A&P and all A&P's with IA should have a borescope. > > Are you using TCP in your gas? > > Al DeMarzoVisit the Ercoupe Swap Page Free, Easy and No Membership > Requiredhttp://www.ercoupeowners.com/swap/swapbook.htm > > > > ----- Original Message ----- > From: heavensounds > To: [email protected] > Sent: Saturday, May 03, 2008 9:26 PM > Subject: [ercoupe-tech] Grounded > > > > Started my annual today. Checking compressions... 79 ! , 79 ! , 79 ! , and > ... (drum roll) > > 59 and the noise of air escaping through the exhaust. : - ( > > Tried staking the exhaust valve. No success. Had to pull the jug. Called > the guy who overhauled them 1 1/2 years ago and he said to bring it over > (Saturday afternoon), that it probably was a stuck exhaust valve and it > should be ready Monday afternoon. Can't complain about his response!! > > Another sour note is that we pulled a helicoil out on another cylinder > when pulling out the spark plug. Something else to deal with. > > Well, as I used to tell my son: "Patience is the mother of happiness" Now > It's my turn to apply it. > Eliacim > > > . > > > > > > > > > > __________________________________________________________ > Get Free (PRODUCT) REDT Emoticons, Winks and Display Pics. > http://joinred.spaces.live.com?ocid=TXT_HMTG_prodredemoticons_052008
