1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

is 40lbs boost to much for stock headgasket and studs?

Thread Tools
 
Search this Thread
 
Old Apr 6, 2012 | 08:10 PM
  #1  
1stGen1990's Avatar
Thread Starter
|
Diesel Enthusiast
Joined: Mar 2010
Posts: 139
Likes: 4
From: Powell Butte, Oregon
Default is 40lbs boost to much for stock headgasket and studs?

I can achieve 40psi boost pretty easy and ive heard thats about as much as you want. is this true?
 
Reply
Old Apr 6, 2012 | 10:23 PM
  #2  
ricet07's Avatar
Diesel Enthusiast
Joined: Apr 2011
Posts: 456
Likes: 28
From: Argyle,WI
Default

Thats about as far as I would push it and I wouldnt do it often.
 
Reply
Old Apr 7, 2012 | 11:39 PM
  #3  
turbo2332's Avatar
Diesel Bomber
Joined: Jun 2011
Posts: 2,171
Likes: 104
From: Indiana
Default

wit the stock size turbo you are fine. wouldnt recommend a bunch higher. i would retorque the head bolts just as a precaution. if you were pushing 40lbs on a bigger turbo you would be having more issues. you dont really have the volume of air to
-really...- pop gaskets yet. can and has been done but still prolly fine and dandy.

i hit 52psi a few times with my stock charger
 
Reply
Old Apr 8, 2012 | 02:17 AM
  #4  
1stgenblowingsmoke's Avatar
Diesel Wrench
Joined: Oct 2011
Posts: 590
Likes: 41
From: Osoyoos BC
Default

I run 40 on mine without problems. Though for some reason my intercooler boot clamps need to be tightened every couple weeks

---AutoMerged DoublePost---

AlsoStock gaskets are good for 50 psi if in good shape.
 

Last edited by 1stgenblowingsmoke; Apr 8, 2012 at 02:17 AM. Reason: Automerged Doublepost
Reply
Old Apr 13, 2012 | 05:28 PM
  #5  
peobryant's Avatar
Diesel Enthusiast
Joined: Apr 2009
Posts: 176
Likes: 7
From: Goshen, Ky
Default

At the bare minimum I'd re-torque to 125ft/lbs but I certainly wouldn't feel comfortable running boost that high with a stock gasket. There is really no way to tell when they'll go before they go. Some let go at 30psi, other have been living with 50+psi for months with no problems.
 
Reply
Old Apr 13, 2012 | 06:57 PM
  #6  
1stgenblowingsmoke's Avatar
Diesel Wrench
Joined: Oct 2011
Posts: 590
Likes: 41
From: Osoyoos BC
Default

Lots of people run 50psi on stock hg n bolts. Peobryant I'm not trying to rag on your but the problem with re-torqueing head bolts is they can stretch or even break while others are fine, Basically it's like a woman, unpredictable on which way they are gonna make life miserable. (No offence intended ladies)

I ran 40psi n the PO of mine did for about 3 years before I got it. It all depends on the truck but most hold 50 or close to it. If your going to re-torque head bolts let it cool over night n pull each bolt one a time n oil the threads that helps get em tighter with less strain on the threads.
 
Reply
Old Apr 13, 2012 | 07:54 PM
  #7  
peobryant's Avatar
Diesel Enthusiast
Joined: Apr 2009
Posts: 176
Likes: 7
From: Goshen, Ky
Default

Originally Posted by 1stgenblowingsmoke
Lots of people run 50psi on stock hg n bolts. Peobryant I'm not trying to rag on your but the problem with re-torqueing head bolts is they can stretch or even break while others are fine, Basically it's like a woman, unpredictable on which way they are gonna make life miserable. (No offence intended ladies)

I ran 40psi n the PO of mine did for about 3 years before I got it. It all depends on the truck but most hold 50 or close to it. If your going to re-torque head bolts let it cool over night n pull each bolt one a time n oil the threads that helps get em tighter with less strain on the threads.
I agree 100%, but personally I'd take that chance over running 40psi with my stock gasket and bolts. I know the risks involved with each and I think the safer route is a re-torque, but again that's my own personal opinion.

And please, call me Parker. I prefer 1st Genners to call me by my first name, that's why I have it in my signature.
 
Reply
Old Apr 13, 2012 | 07:57 PM
  #8  
JBradley500's Avatar
Diesel Enthusiast
Joined: Apr 2010
Posts: 220
Likes: 13
Default

i have been running over 40 for a while... now its up to 44. studs and stock gasket.
 
Reply
Old Apr 13, 2012 | 09:04 PM
  #9  
welderboy250's Avatar
Diesel Enthusiast
Joined: Dec 2007
Posts: 271
Likes: 8
From: Newburg, PA
Default

With original 760,xxx mile head gasket and bolts and an HX52 I'm seeing 45 psi with no bad signs yet. It's not that I so much expect to never have trouble with this situation but I thought I'd throw in my experience.
 
Reply
Old Apr 13, 2012 | 09:42 PM
  #10  
1stgenblowingsmoke's Avatar
Diesel Wrench
Joined: Oct 2011
Posts: 590
Likes: 41
From: Osoyoos BC
Default

Originally Posted by peobryant
I agree 100%, but personally I'd take that chance over running 40psi with my stock gasket and bolts. I know the risks involved with each and I think the safer route is a re-torque, but again that's my own personal opinion.

And please, call me Parker. I prefer 1st Genners to call me by my first name, that's why I have it in my signature.
Sorry can't see your sig for some reason. If I was to re-torque mine I thin i'd go the safe route of new bolts. But I may pull the head in a year or so n replace the gasket n run studs just to be on the safe side with the drive pressure.
 
Reply



All times are GMT -5. The time now is 08:47 AM.