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Autopsy Report on Cruis'n Rulz!
On Fri, 25 Jul 2008 09:01:33 -0700 (PDT), penned
the following well considered thoughts to the readers of rec.boats: |On Jul 25, 11:21*am, JR North wrote: | The result of the failed right bank manifold, allowing sea water to run | in the exhaust port into the cylinder. That's what seized the valve | also. Only 2 cylinders show rust on the right bank, none on the left. | JR | | | |That makes sense. So what's the plan? IMHO........................... Jasper...... -- Agent 5.00 Build 1159 Grady-White Gulfstream, out of Oak Island, NC. Homepage http://pamandgene.idleplay.net/ Rec.boats at Lee Yeaton's Bayguide http://www.thebayguide.com/rec.boats |
Autopsy Report on Cruis'n Rulz!
My machinist is going to go through the heads. He's great. I will hone
the cylinders also while the heads are off. Since I had to pull the FWC and P/S-Alt package to remove the left head, I yanked the water pump also for replacement, and am going to pull the balancer and timing cover. The cover is pretty rusty, so refinish there and new front seal. A lot of the fasteners on the engine were not SS, and very corroded, so a comprehensive replacement of all the steel fasteners also. I figure this scenario is fortuitous; a couple more years and most of those fasteners would have just snapped off. JR wrote: On Jul 25, 11:21 am, JR North wrote: The result of the failed right bank manifold, allowing sea water to run in the exhaust port into the cylinder. That's what seized the valve also. Only 2 cylinders show rust on the right bank, none on the left. JR That makes sense. So what's the plan? -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
Autopsy Report on Cruis'n Rulz!
"Gene Kearns" wrote in message .com... On Fri, 25 Jul 2008 09:01:33 -0700 (PDT), penned the following well considered thoughts to the readers of rec.boats: |On Jul 25, 11:21 am, JR North wrote: | The result of the failed right bank manifold, allowing sea water to run | in the exhaust port into the cylinder. That's what seized the valve | also. Only 2 cylinders show rust on the right bank, none on the left. | JR | | | |That makes sense. So what's the plan? IMHO........................... Jasper...... Same opinion here. If you fix this block, the next thing that will happen is one of the side plugs, buried down where you can't get at it will let go and you'll be back to square one. (assuming it's raw water cooled). Don't bother asking how I know. Eisboch |
Autopsy Report on Cruis'n Rulz!
"Gene Kearns" wrote in message .com... On Fri, 25 Jul 2008 09:01:33 -0700 (PDT), penned the following well considered thoughts to the readers of rec.boats: |On Jul 25, 11:21 am, JR North wrote: | The result of the failed right bank manifold, allowing sea water to run | in the exhaust port into the cylinder. That's what seized the valve | also. Only 2 cylinders show rust on the right bank, none on the left. | JR | | | |That makes sense. So what's the plan? IMHO........................... Jasper...... Or any machine shop that does truck engines. They pick up old heads from a junkyard and rebuild them. They won't accept marine heads for cores. -- Agent 5.00 Build 1159 Grady-White Gulfstream, out of Oak Island, NC. Homepage http://pamandgene.idleplay.net/ Rec.boats at Lee Yeaton's Bayguide http://www.thebayguide.com/rec.boats |
Autopsy Report on Cruis'n Rulz!
jamesgangnc wrote:
wrote in message ... On Jul 25, 8:03 am, "jamesgangnc" wrote: "JR North" wrote in message . .. As The Wrench Turns... Got the heads off; and posted some pics on the metalworking Dropbox at: http://www.metalworking.com/dropbox/ See valve.jpg 3 pics No damage to the cylinder wall or head, and just a couple minor dings on the piston crown. Lucky me. JR HOME PAGE: http://www.seanet.com/~jasonrnorth -------------------------------------------------- That's a lot of rust on that head. Other one look like that? That's what I thought......certainly makes think about whether this is common with I/O's. Never owned one, so I don't know. I believe he said he fogged it, didn't he? Not the ones I see. But then I'm in "trailer boating in lakes" land here in Raleigh. Might be sitting in a slip in salt water does it. There is going to be one or two cylinders sitting with the exhaust valve open when the engine is shut off just about everytime. If the boat sits in water then the humidity is going to remain high through the exhaust system so it will get high in the cylinder as well. It's not specific to an i/o though, any boat with an inboard marinized auto engine is going to be in the same situation. I would have expected the small amount of oil that gets past the valve stems to keep the valves from sticking though. The main issue specific to i/os in a slip is that the outdrive sits in the water. Most outboards can be raised enough to get the entire engine out of the water. Regular use would probably reduce the problem. And that might explain why commercial fishing boats run marinized auto engines for a long time without problems. I concur, the salt isn't the problem. Mine is slipped in the Salt and when I rebuilt the engine there was no internal rust. There is a lot of surface rust that you need to stay ahead of. Even if you can't take it out, running the engine weekly if it sits in the salt helps. My boat goes out fishing 1-2 times per week 44 weeks per year given decent weather. With a valve frozen and that amount of rust I would want to look at the oil pump and passageways. When the valve cover was open, did there apprear to be oil on the rocker arms? Sandpounder 24' Skipjack FB |
Autopsy Report on Cruis'n Rulz!
On Fri, 25 Jul 2008 12:14:36 -0400, Gene Kearns
wrote: On Fri, 25 Jul 2008 09:01:33 -0700 (PDT), penned the following well considered thoughts to the readers of rec.boats: |On Jul 25, 11:21?am, JR North wrote: | The result of the failed right bank manifold, allowing sea water to run | in the exhaust port into the cylinder. That's what seized the valve | also. Only 2 cylinders show rust on the right bank, none on the left. | JR | | | |That makes sense. So what's the plan? IMHO........................... Jasper...... Just one data point. Had a Jasper rebuilt 350 develop a rod knock with only about 25k miles on it. I'd go with a factory crate. IMHO. --Vic |
Autopsy Report on Cruis'n Rulz!
On Jul 25, 12:57*pm, Vic Smith
wrote: On Fri, 25 Jul 2008 12:14:36 -0400, Gene Kearns wrote: On Fri, 25 Jul 2008 09:01:33 -0700 (PDT), penned the following well considered thoughts to the readers of rec.boats: |On Jul 25, 11:21?am, JR North wrote: | The result of the failed right bank manifold, allowing sea water to run | in the exhaust port into the cylinder. That's what seized the valve | also. Only 2 cylinders show rust on the right bank, none on the left. | JR | | | |That makes sense. *So what's the plan? IMHO........................... Jasper...... Just one data point. *Had a Jasper rebuilt 350 develop a rod knock with only about 25k miles on it. I'd go with a factory crate. *IMHO. --Vic I'd pull the valves on the two cyclinders with the rust, clean them up and lap in a new exhaust valve. Stick it back together and run it until something else goes. It'll only cost a hundred or so for gaskets and a valve. The engine had good compression so it could go another 500 hours. The valve problem is from going too long with a bad exhaust. Not an engine problem. |
Autopsy Report on Cruis'n Rulz!
Besides which, they are wrong.
JR JimH wrote: On Jul 25, 4:01 pm, JR North wrote: It's FWC, boys and girls. There is no way I would ever run salt water through an engine- it's a dead end proposition. JR JR North wrote: As The Wrench Turns... Got the heads off; and posted some pics on the metalworking Dropbox at: http://www.metalworking.com/dropbox/ See valve.jpg 3 pics No damage to the cylinder wall or head, and just a couple minor dings on the piston crown. Lucky me. JR HOME PAGE: http://www.seanet.com/~jasonrnorth -------------------------------------------------- -- -------------------------------------------------------------- Home Page:http://www.seanet.com/~jasonrnorth Sorry about your problems with the boat. Glad to read that you got things sorted out and have been given some solid advice. Ignore the folks who were quick to jump on you for not fogging the engine when in storage..............that same group constantly sees the glass as only half full and are fast to find fault with the way folks live their lives or maintain their boats. -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
Autopsy Report on Cruis'n Rulz!
So you're removing the block as well?
"JR North" wrote in message ... My machinist is going to go through the heads. He's great. I will hone the cylinders also while the heads are off. Since I had to pull the FWC and P/S-Alt package to remove the left head, I yanked the water pump also for replacement, and am going to pull the balancer and timing cover. The cover is pretty rusty, so refinish there and new front seal. A lot of the fasteners on the engine were not SS, and very corroded, so a comprehensive replacement of all the steel fasteners also. I figure this scenario is fortuitous; a couple more years and most of those fasteners would have just snapped off. JR wrote: On Jul 25, 11:21 am, JR North wrote: The result of the failed right bank manifold, allowing sea water to run in the exhaust port into the cylinder. That's what seized the valve also. Only 2 cylinders show rust on the right bank, none on the left. JR That makes sense. So what's the plan? -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
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