Notices

454 rear main leak

Old 08-06-2019, 05:30 PM
  #1  
Registered
Thread Starter
 
Join Date: Aug 2019
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Default 454 rear main leak

Hello so I have a 454 in a 98 commander. Just got the boat and apparently the motor was redone 10 hours ago. It is very clean however I cant find the serial number to the engine so I'm not sure which 454 was put in it. Pretty sure it's a gen VI block because it has the mech fuel pump boss that's blocked off by teague with electric fuel pump. I have a leak at the rear and after filming a video its dripping off the oil pan flange at the rear main seal.

Gonna have a shop on monday pull the motor but is there anything else I should have them check while the motor is out? Also, why would the rear main go if the engine truly only had 10 hours on it? Is it the oil pan leaking at the seal?

Last edited by rspillman88; 08-06-2019 at 05:34 PM.
rspillman88 is offline  
Old 08-06-2019, 05:34 PM
  #2  
Registered
 
Join Date: Apr 2013
Location: Lagrange ky
Posts: 309
Likes: 0
Received 0 Likes on 0 Posts
Default

it probably leaked from first start. it may be an older 2 piece seal block which are harder to get installed than the one piece. ten hours isnt that long of a time.
beaver 3 is offline  
Old 08-06-2019, 05:44 PM
  #3  
Registered
Thread Starter
 
Join Date: Aug 2019
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by beaver 3
it probably leaked from first start. it may be an older 2 piece seal block which are harder to get installed than the one piece. ten hours isnt that long of a time.
okay makes sense yeah I do believe it's a 6th gen block which should be one peice?
rspillman88 is offline  
Old 08-06-2019, 05:56 PM
  #4  
Registered
Thread Starter
 
Join Date: Aug 2019
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Default

Any items they should absolutely check while the engine is out?
rspillman88 is offline  
Old 08-06-2019, 06:04 PM
  #5  
Registered
iTrader: (1)
 
Join Date: Apr 2014
Location: North Florida
Posts: 649
Received 121 Likes on 58 Posts
Default

Don’t rule out the oil pan gasket. I had a very expensive gasket completely disintegrate after about 15 hours. Leaked right at the back at wot.
ph1971 is offline  
Old 08-06-2019, 09:05 PM
  #6  
Registered
 
Join Date: Aug 2013
Location: Kemah, Tx
Posts: 397
Received 131 Likes on 54 Posts
Default

Check you valve covers they can leak down the back of the block and look like a rear seal leak.
sailtexas186548 is offline  
Old 08-07-2019, 09:03 AM
  #7  
Registered
Thread Starter
 
Join Date: Aug 2019
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Default

Its definitely dripping off the oil pan right at the rear main
rspillman88 is offline  
Old 08-07-2019, 09:18 AM
  #8  
Platinum Member
Platinum Member
iTrader: (6)
 
F-2 Speedy's Avatar
 
Join Date: May 2012
Location: Midwest & T-Rock
Posts: 10,388
Received 3,029 Likes on 1,347 Posts
Default

There are 3 oil passages with pipe plugs around the rear cam journal area and also one in the rear of the block below the distributor, something to check.
F-2 Speedy is offline  
Old 08-07-2019, 09:22 AM
  #9  
Registered
Thread Starter
 
Join Date: Aug 2019
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Default

Thank you I will take a look at it
rspillman88 is offline  
Old 08-07-2019, 09:23 AM
  #10  
Registered
Thread Starter
 
Join Date: Aug 2019
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by F-2 Speedy
There are 3 oil passages with pipe plugs around the rear cam journal area and also one in the rear of the block below the distributor, something to check.
could one of those make it drip from the flange where the oil pan meets the rear main cap?
rspillman88 is offline  

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.