Original Posted By: "kevinpurtee"
Very well done Mike!--------JohnRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Another Burned Valve
Pietenpol-List: Another Burned Valve
Pietenpol-List: Re: Another Burned Valve
Original Posted By: "Kringle"
In January of last year the number 3 exhaust valve burned & failed on my corvair.One of the recommended vendors did a great job getting the heads re-done andback to me. The failure occurred at 190 hours. On March 31st of this year the same valve failed in the same way. This event occurredat 290 hours. WW believes that a leak in the intake system on that sideof the motor is likely causing the failure. The intake tubes were bolted ontothe head and my primer entered the head at the stock carb base on that sideof the motor. Given my inexperience at aircraft plumbing it would not be toogreat a leap to think that my sealing techniques may be the issue. (Every problemIve had with FBG has been self-induced.)Mark P. has re-done the heads to include welding on intake runners. Ill replacemy intake manifold with a WW version. These mods should eliminate the possibilityof an intake leak. The other major difference in the heads is that Markadded valve rotators.Then there are my friends at UPS When I sent the heads to Mark, I transposed a number on his address. That delayeddelivery for a week. My fault, but UPS response was dismal. The finishedheads were supposed to be delivered to me yesterday. Turns out, they were ona train in Illinois that was derailed by a tornado. Now the UPS site says theheads are either, 1) on the truck for delivery today, or 2) still in Illinois.Im pretty frustrated, having lost the two best months of the fly-in season. Anyway, Ill have to modify the cowling at least a little but I hope the reinstallationgoes well and Im flying by the 26th of May.Thinking happy thoughts in Austin.--------Kevin "Axel" PurteeNX899KPAustin/San Marcos, TXRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Another Burned Valve
In January of last year the number 3 exhaust valve burned & failed on my corvair.One of the recommended vendors did a great job getting the heads re-done andback to me. The failure occurred at 190 hours. On March 31st of this year the same valve failed in the same way. This event occurredat 290 hours. WW believes that a leak in the intake system on that sideof the motor is likely causing the failure. The intake tubes were bolted ontothe head and my primer entered the head at the stock carb base on that sideof the motor. Given my inexperience at aircraft plumbing it would not be toogreat a leap to think that my sealing techniques may be the issue. (Every problemIve had with FBG has been self-induced.)Mark P. has re-done the heads to include welding on intake runners. Ill replacemy intake manifold with a WW version. These mods should eliminate the possibilityof an intake leak. The other major difference in the heads is that Markadded valve rotators.Then there are my friends at UPS When I sent the heads to Mark, I transposed a number on his address. That delayeddelivery for a week. My fault, but UPS response was dismal. The finishedheads were supposed to be delivered to me yesterday. Turns out, they were ona train in Illinois that was derailed by a tornado. Now the UPS site says theheads are either, 1) on the truck for delivery today, or 2) still in Illinois.Im pretty frustrated, having lost the two best months of the fly-in season. Anyway, Ill have to modify the cowling at least a little but I hope the reinstallationgoes well and Im flying by the 26th of May.Thinking happy thoughts in Austin.--------Kevin "Axel" PurteeNX899KPAustin/San Marcos, TXRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Another Burned Valve
RE: Pietenpol-List: Another Burned Valve
Original Posted By: owner-pietenpol-list-server(at)matronics.com
".if I don't know the answer I can make up stuff with big words." THAT's thespirit, Shad! Gary BootheNX308MB
".if I don't know the answer I can make up stuff with big words." THAT's thespirit, Shad! Gary BootheNX308MB
Pietenpol-List: Re: Another Burned Valve
Original Posted By: "kevinpurtee"
Tools,Here's some more that I pulled off of www.westcoastpiet.com a long time ago.St. GaryNX308MB________________________________________________________________________________Subject: Pietenpol-List: Re: Another Burned Valve
Tools,Here's some more that I pulled off of www.westcoastpiet.com a long time ago.St. GaryNX308MB________________________________________________________________________________Subject: Pietenpol-List: Re: Another Burned Valve