Go Back  Offshoreonly.com > Technical > General Q & A
20 teeth broken off of my cam gear!! >

20 teeth broken off of my cam gear!!

Notices

20 teeth broken off of my cam gear!!

Thread Tools
 
Old 10-14-2008, 06:12 AM
  #11  
Registered
 
Join Date: Nov 2005
Location: Fredericksburg, Va
Posts: 4,554
Likes: 0
Received 2 Likes on 2 Posts
Default

the 2 gen IV's I pulled out of my gibson(92) had the front oil galley plugs drilled from the factory, engines never been apart, and no bearing under the gears...Rob
ezstriper is offline  
Old 10-14-2008, 03:15 PM
  #12  
Charter Member #601
Charter Member
 
Mr Gadgets's Avatar
 
Join Date: Dec 2000
Location: Holland, Mi USA.
Posts: 3,276
Received 5 Likes on 4 Posts
Default

Vinny how much streach in the chain? It shouldnt have much. Maybe pick it up holding it at opposite ends and see how much it sags in the middle. I can do the same with mine and see if it relates. But mine is .400" raised cam. Just a thought.
Dick
Mr Gadgets is offline  
Old 10-14-2008, 07:33 PM
  #13  
I hate the winter!!
Platinum Member
Thread Starter
 
Vinny P's Avatar
 
Join Date: Jul 2001
Location: long island, new york
Posts: 2,707
Likes: 0
Received 0 Likes on 0 Posts
Default

Sorry Dick, but the parts are already on their way back to Bob Madera. I can say that the chain had very little play in it. I checked it by pulling it tight by twisting the crank a bit, then wiggling the slack side. It seemed fine to me.

The good news.. I pulled all my main and rod bearings. Everything looked good, so I put it all back together. The oil pump looked good, but I ordered a new Melling blueprinted pump anyway.
Vinny P is offline  
Old 10-14-2008, 10:16 PM
  #14  
Charter Member #601
Charter Member
 
Mr Gadgets's Avatar
 
Join Date: Dec 2000
Location: Holland, Mi USA.
Posts: 3,276
Received 5 Likes on 4 Posts
Default

Vinny,
I sent you some pics..
Dick
Mr Gadgets is offline  
Old 10-15-2008, 01:23 AM
  #15  
Registered
 
2112's Avatar
 
Join Date: Dec 2003
Location: Socialist Republic of Washington State
Posts: 1,991
Received 12 Likes on 6 Posts
Default

Vinny,

Have you considered using a belt driven external wet sump pump? Not all the room needed as for a dry sump and you get the load off the timing chain/cam &dist gears and drive shaft. I made the change for those reasons and still use my wet sump pan.

.
2112 is offline  
Old 10-15-2008, 08:23 AM
  #16  
Registered
 
PatriYacht's Avatar
 
Join Date: Jul 2002
Location: Waterford,MI
Posts: 2,867
Likes: 0
Received 1 Like on 1 Post
Default

I use Cloyes timing sets and have never had a problem. Still look like new after 150 hours turning a high volume Melling pump. I would question the quality of the timing set and look for something binding somewhere
PatriYacht is offline  
Old 10-15-2008, 08:31 AM
  #17  
Registered
 
PatriYacht's Avatar
 
Join Date: Jul 2002
Location: Waterford,MI
Posts: 2,867
Likes: 0
Received 1 Like on 1 Post
Default

Was the oil pump driveshaft taken out at the same time? If so, I would wonder about the oil pump. Cavitation?
PatriYacht is offline  
Old 10-15-2008, 06:57 PM
  #18  
I hate the winter!!
Platinum Member
Thread Starter
 
Vinny P's Avatar
 
Join Date: Jul 2001
Location: long island, new york
Posts: 2,707
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by PatriYacht
Was the oil pump driveshaft taken out at the same time? If so, I would wonder about the oil pump. Cavitation?
After suspecting a broken timing gear and tearing down the engine, I discovered the broken oil pump drive and the damaged timing gear.
Vinny P is offline  
Old 10-15-2008, 07:00 PM
  #19  
I hate the winter!!
Platinum Member
Thread Starter
 
Vinny P's Avatar
 
Join Date: Jul 2001
Location: long island, new york
Posts: 2,707
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by PatriYacht
I use Cloyes timing sets and have never had a problem. Still look like new after 150 hours turning a high volume Melling pump. I would question the quality of the timing set and look for something binding somewhere
I agree, I think this gear set was a P.O.S. It almost cost me an engine. The cam spins free in the block, dont feel it was a binding issue. I am going to run a new oil pump for sure.
Vinny P is offline  
Old 10-15-2008, 07:01 PM
  #20  
I hate the winter!!
Platinum Member
Thread Starter
 
Vinny P's Avatar
 
Join Date: Jul 2001
Location: long island, new york
Posts: 2,707
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 2112
Vinny,

Have you considered using a belt driven external wet sump pump? Not all the room needed as for a dry sump and you get the load off the timing chain/cam &dist gears and drive shaft. I made the change for those reasons and still use my wet sump pan.

.
No I didnt, but thats an interesting thought. I have never seen anyone run one on a boat before. I dont think I would do it, but just curious, do you have a few pictures of that set-up?
Vinny P is offline  


Quick Reply: 20 teeth broken off of my cam gear!!


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.