Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > Tech Area- Dodge > Dodge Tech > 03-07 3rd Gen.
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Reply
 
Thread Tools
Old 10-17-2020, 10:36 PM   #1
Nbdiesel

Name: Nbdiesel
Title: Rookie
Status: Not Here
Join Date: Apr 2020
Member`s Gallery
Posts: 17
Valves leaking. Take a look and tell me if Im missing something

So this isn't right is it? I have 103 hamilton springs , well I bought them and the head shop was supposed to put them in. So backround was, I was looking for a boost leak and when charging the turbo at 20psi I could hear a leak in the valve cover. So I took it off and could hear a leak in number 5 or 6 cylinder. This is 3000 miles after I just had Source Automotive check the head and oring. They send the head work out to some one else, so not source fault. I took the head off and made a plate to pressurize the intake to 20 or 30 psi and all the intake valve leak except like 1. How can 20 or 30 psi of boost open the valves and leak in if the head is good???? I wish I had another head to test. I would think the springs would hold the valve shut and the air would not come out.

5.9 cummins leaking valves - YouTube
  Reply With Quote
Old 10-18-2020, 08:24 PM   #2
ComnRailPwr
 
ComnRailPwr's Avatar

Name: ComnRailPwr
Title: Too Much Time
Status: Not Here
Join Date: Jun 2009
Location: Stoutsville , OH
Member`s Gallery
Posts: 3,251
It needs a new valve job. Whoever did it sucked.

Sent from my SM-G960U using Tapatalk
  Reply With Quote
Old 10-19-2020, 11:16 AM   #3
TheHammer
 
TheHammer's Avatar

Name: TheHammer
Title: broke
Status: Not Here
Join Date: May 2012
Location: juneau wi
Member`s Gallery
Posts: 644
I’ve seen the guides and valve stems wear out so bad it has caused this issue but that is very rare. Otherwise, what happens is some of these machine shops use the wrong tooling/cutter, the seats in these heads are more difficult to cut compared to most automotive applications and the end result is a choppy finish on the seat and/or valve. The shop didn’t lap the valves to the seat nor did they vacuum test them. I’d put money on the seat being very un smooth. One of the very first builds I did years ago that burnt me in many ways was do to this exact issue, poor machine work.
  Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -5. The time now is 06:53 AM.

 


Powered by vBulletin
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2020, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com