Dodge Cummins Diesel Forum - Reply to Topic
94-98 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

Thread: 12v valve stem (old style) seals slipping off head Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
05-24-2019 02:24 AM
5912valve Makes sense then. Im probably gonna get my head cut at a shop or attempt it myself. That new head from power driven is tempting though. Already have 60lb springs, and the top hat seals so if the valves and seats are good, might as well just keep it and save the money.
05-22-2019 09:16 PM
thor363
Quote:
Originally Posted by dauntless89 View Post
Might have one at the shop. I can check if I get time tomorrow.


That said, I'm nearly certain you'd be money ahead just having the machinist do it.
This is exactly why I went that way in the end.
05-22-2019 10:57 AM
k9american This the video I was referring to. Discussion about "top hat" seals is at about 1:20. No mention of machining but maybe he left that step out.
05-22-2019 05:36 AM
afterburn549 You can order most anything from Goodsons. https://goodson.com/
Machining a guide on the outside can be done with head on the engine
-one has to be very careful with the FOD (shavings)
05-22-2019 01:28 AM
dauntless89 Might have one at the shop. I can check if I get time tomorrow.


That said, I'm nearly certain you'd be money ahead just having the machinist do it.
05-21-2019 11:04 PM
thor363 I spent forever trying to figure out which one. I finally just had my machinist take care of the cutting when he reworked and ported my head. Cost was something like $60 for the work on cutting the guide area.
05-21-2019 10:37 PM
myother4x4isaCJ7
Quote:
Originally Posted by dauntless89 View Post
Top hat seals don't drop on to factory heads. The stem seal boss needs to be machined but you can do it with a cordless drill and a special cutter with the head off the engine.
Any idea what size of cutter to get?
05-21-2019 07:04 PM
dauntless89 Top hat seals don't drop on to factory heads. The stem seal boss needs to be machined but you can do it with a cordless drill and a special cutter with the head off the engine.
05-21-2019 06:13 PM
GAmes Videos and links to videos are posted every day.
05-21-2019 02:58 PM
k9american PDD has a recent video about 60# springs, retainers and locks. They also stock the top hat seals. I saw their video of those seals and don't recall hearing anything about machining the head. I'll have to look for that again. Could be wrong. I'd post links but don't think that's allowed.
05-21-2019 08:26 AM
afterburn549 Ideas-
Dont drop the valve when you do this but check the valve to guide clearance.
I would guess there is a high degree of wobble going on?
OR, Maybe -
you have the wrong size / style of stem seals for the guides.
05-09-2019 10:03 AM
thor363
Quote:
Originally Posted by 5912valve View Post
Was the machining required for the new seals? What year 12 valve?
1995 12 valve and yes the valve guide area needs to be cut down to accommodate, but it wasn't much to do. Had the entire head ported mildly to unshroud below the valves and the guides cut for the new seals, as well as valve job for 500 if I recall correctly. Reassembled with new springs, seals, and retainers/keepers.
This thread has more than 12 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome