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 Competition and Performance > P-Pump 24Valve
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Reply
 
Thread Tools
Old 04-13-2019, 02:26 AM   #21
Beat68CST
 
Beat68CST's Avatar

Name: Beat68CST
Title: HP & $$
Status: Not Here
Join Date: Nov 2012
Location: Buckeye, Az
Member`s Gallery
Posts: 495
After taking shipment of cam, make sure it's straight.

A good engine builder should be able to check and straighten one...
__________________
1999 Beetle ALH
2004.5 Jetta BEW
2013 Jetta Wagon CJAA
All Malone tuned.

1993 W350
1968 C20 12v pile of parts.
  Reply With Quote
Old 04-13-2019, 09:11 AM   #22
TheHammer
 
TheHammer's Avatar

Name: TheHammer
Title: broke
Status: Not Here
Join Date: May 2012
Location: juneau wi
Member`s Gallery
Posts: 572
Quote:
Originally Posted by DISTURBED View Post
My gut says this isn't a billet steel cam. I can't remember the last time I heard a billet steel cam breaking. Cast is a different story.
X2

Two years ago I had a customer with a 2.5 engine, 4v with a 13mm. He broke a cam similar to what you are describing, one look at the core, never again will I install that brand cam in a competition build. Since switching to no limit cams, I havenít had any questions, concerns or problems.

And 103# at what height? That number means nothing. I understand that itís advertised as such, but testing springs at the installed height is crucial, imo....

Iíd be inspecting the gear lash and thrust on all components, the clearance between the cam and journals, straightness of cam,,, exc. pretty standard assembly.
__________________
11 bmw 335d - ForSale
01 f350 some fuel and adequate air
95 sclb 12v not slow n not quite fast
94 f350 S.S.
18 F-150 531rwtq/454rwhp
  Reply With Quote
Old 04-13-2019, 09:17 AM   #23
pushlar84
 
pushlar84's Avatar

Name: pushlar84
Title: pushlar84
Status: Not Here
Join Date: Dec 2009
Location: new york
Member`s Gallery
Posts: 580
No limit cams is where itís at imo
__________________
2001 Ram- fuel by Northeast Diesel, 2.6 ED, Allison 1000. Haisley cam, engine & trans built in house
  Reply With Quote
Old 04-15-2019, 04:30 PM   #24
Yotadzl

Name: Yotadzl
Title: Diesel Enthusiast
Status: Not Here
Join Date: Feb 2016
Location: Oregon
Member`s Gallery
Posts: 211
Quote:
Originally Posted by DISTURBED View Post
My gut says this isn't a billet steel cam. I can't remember the last time I heard a billet steel cam breaking. Cast is a different story.
You are right, I should have just said steel cam. Most of them are advertised as being machined from new steel billets, but I believe it is a cast steel blank. That being said, the manufacturer claimed to have not seen another one break without other mechanical failures causing it to bind and break.
__________________

'85 Yota Crawler-2l diesel, custom built VE (by me), custom T25 turbo. Slow but fun!
'95 Cummins grampa truck, embarrassingly stock
'12 Cummins, deleted
  Reply With Quote
Old 04-15-2019, 04:36 PM   #25
Yotadzl

Name: Yotadzl
Title: Diesel Enthusiast
Status: Not Here
Join Date: Feb 2016
Location: Oregon
Member`s Gallery
Posts: 211
Quote:
Originally Posted by TheHammer View Post
X2

Two years ago I had a customer with a 2.5 engine, 4v with a 13mm. He broke a cam similar to what you are describing, one look at the core, never again will I install that brand cam in a competition build. Since switching to no limit cams, I havenít had any questions, concerns or problems.

And 103# at what height? That number means nothing. I understand that itís advertised as such, but testing springs at the installed height is crucial, imo....

Iíd be inspecting the gear lash and thrust on all components, the clearance between the cam and journals, straightness of cam,,, exc. pretty standard assembly.
Ya I'm starting to think I shouldn't trust what I am being told by the manufacturer. I trust my engine builder and have not had this type of issue over multiple builds in the past. I will certainly be checking all those things when I tear it down. Thanks for your input.
__________________

'85 Yota Crawler-2l diesel, custom built VE (by me), custom T25 turbo. Slow but fun!
'95 Cummins grampa truck, embarrassingly stock
'12 Cummins, deleted
  Reply With Quote
Old 04-15-2019, 06:33 PM   #26
bracker8040

Name: bracker8040
Title: Too Much Time
Status: Not Here
Join Date: Jan 2007
Member`s Gallery
Posts: 522
Do you care to enlighten us on what brand of cam? Not looking to bash, just would like to know.
  Reply With Quote
Old 04-15-2019, 09:41 PM   #27
Yotadzl

Name: Yotadzl
Title: Diesel Enthusiast
Status: Not Here
Join Date: Feb 2016
Location: Oregon
Member`s Gallery
Posts: 211
Quote:
Originally Posted by bracker8040 View Post
Do you care to enlighten us on what brand of cam? Not looking to bash, just would like to know.


Iíd rather not at this point. I donít want to bash anyone until I figure out what the actual problem is.


Sent from my iPhone using Tapatalk
__________________

'85 Yota Crawler-2l diesel, custom built VE (by me), custom T25 turbo. Slow but fun!
'95 Cummins grampa truck, embarrassingly stock
'12 Cummins, deleted
  Reply With Quote
Old 04-16-2019, 07:42 AM   #28
bracker8040

Name: bracker8040
Title: Too Much Time
Status: Not Here
Join Date: Jan 2007
Member`s Gallery
Posts: 522
Quote:
Originally Posted by Yotadzl View Post
Iíd rather not at this point. I donít want to bash anyone until I figure out what the actual problem is.


Sent from my iPhone using Tapatalk
Understandable.
  Reply With Quote
Old 04-16-2019, 12:25 PM   #29
biggy238
 
biggy238's Avatar

Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 8,190
Any pictures of the parts? Stock cam gear?

Sent from my SM-G950U using Tapatalk
__________________
Quote:
People tend to be tribal
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 5.4L Auto
-Janus
  Reply With Quote
Old 04-16-2019, 05:23 PM   #30
Yotadzl

Name: Yotadzl
Title: Diesel Enthusiast
Status: Not Here
Join Date: Feb 2016
Location: Oregon
Member`s Gallery
Posts: 211
Click the image to open in full size.Click the image to open in full size.
Hereís a few pictures of the first broken cam.


Sent from my iPhone using Tapatalk
__________________

'85 Yota Crawler-2l diesel, custom built VE (by me), custom T25 turbo. Slow but fun!
'95 Cummins grampa truck, embarrassingly stock
'12 Cummins, deleted
  Reply With Quote
Old 04-16-2019, 05:53 PM   #31
bracker8040

Name: bracker8040
Title: Too Much Time
Status: Not Here
Join Date: Jan 2007
Member`s Gallery
Posts: 522
Quote:
Originally Posted by Yotadzl View Post
Click the image to open in full size.Click the image to open in full size.
Hereís a few pictures of the first broken cam.


Sent from my iPhone using Tapatalk
Iím sure thatís cast.
  Reply With Quote
Old 04-16-2019, 06:10 PM   #32
biggy238
 
biggy238's Avatar

Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 8,190
OK, after seeing pictures, I'm sticking with my first thought, I believe this is a gear out of concentricity, and cycling side load as it rotates. I would look for an odd or dual wear pattern on the cam gear and those in mesh with it.

Sent from my SM-G950U using Tapatalk
__________________
Quote:
People tend to be tribal
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 5.4L Auto
-Janus
  Reply With Quote
Old 06-23-2019, 06:05 PM   #33
Inbred Inline
 
Inbred Inline's Avatar

Name: Inbred Inline
Title: Bastard child builder
Status: Not Here
Join Date: Dec 2014
Location: SE Michigan
Member`s Gallery
Posts: 335
For the sled pullers/big setups on this thread running no limit, are you guys running the plain steel ones or the tool steel cams?
__________________
1994 Chevy RCLB C1500 6BT NV4500
2008 GMC CCLB 2500HD CR 5.9 ZF6 Tow Pig "Professional Grade"
1992 Club Car, Kubota z430 "Inbred Inline Jr"
2000 Chevy CCSB C3500 3.0 Pro Stock 4x4 "Inbred Inline"
-2017/2018 Wolverine pullers 3.0 PSD Champion
  Reply With Quote
Old 06-24-2019, 05:37 AM   #34
pushlar84
 
pushlar84's Avatar

Name: pushlar84
Title: pushlar84
Status: Not Here
Join Date: Dec 2009
Location: new york
Member`s Gallery
Posts: 580
Quote:
Originally Posted by Inbred Inline View Post
For the sled pullers/big setups on this thread running no limit, are you guys running the plain steel ones or the tool steel cams?
Plain steel
__________________
2001 Ram- fuel by Northeast Diesel, 2.6 ED, Allison 1000. Haisley cam, engine & trans built in house
  Reply With Quote
Old 06-24-2019, 07:27 AM   #35
9724VF350
 
9724VF350's Avatar

Name: 9724VF350
Title: Tractor Guy
Status: Not Here
Join Date: Mar 2010
Location: Northeast Ohio
Member`s Gallery
Posts: 2,688
Quote:
Originally Posted by TheHammer View Post
X2

Iíd be inspecting the gear lash and thrust on all components, the clearance between the cam and journals, straightness of cam,,, exc. pretty standard assembly.
This. I've seen cases where the block has been linebored incorrectly, reducing cam gear backlash, and breaking the cam as a result.
__________________
97 F350 4X4 CC Dually 5spd 24V 913 S300/HT3B Ranch Hand.
Playtoy-Oliver 1655. 12V now, 13mm, S475


Wife's ride-03 Excursion 12V swap in the works.
  Reply With Quote
Old 06-24-2019, 08:15 AM   #36
zfaylor
 
zfaylor's Avatar

Name: zfaylor
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Nov 2010
Location: P-TOWN!, Indiana
Member`s Gallery
Posts: 4,811
Adjustable pump gear by chance? The last one we installed on a 3.0 truck was built very far off center. The Gear would get tight enough to hardly rotate the engine on one side.
__________________
2015 half ton heavy chevy
81 Fairmont LS project
Many yard ornament projects...

North American Turbo
  Reply With Quote
Old 06-24-2019, 08:24 AM   #37
Signature600
 
Signature600's Avatar

Name: Signature600
Title: THA MAN!
Status: Not Here
Join Date: Aug 2006
Location: Jeffersonville, Ohio
Member`s Gallery
Posts: 11,235
My bet, he's coming out of the fuel hard and unloading the drive strain on the cam is causing this. It takes a lot of power to drive a good P-pump, and when you unload it quick it can be a shock...Why it isn't drilled to the second journal is beyond me, everyone knows that is a must on a P-pump.

Junk cam, IMHO
Chris
__________________


THANKS TO:
Tim Barber @ TRE Diesel
Jeff Mumau @ Mumau Diesel Service
Rip @ Source Automotive
Don Thuren @ ThurenFab Suspension
Columbus Diesel Supply

  Reply With Quote
Old 06-24-2019, 08:39 AM   #38
Soup Nazi
 
Soup Nazi's Avatar

Name: Soup Nazi
Title: The artist formerly known as Don M
Status: Not Here
Join Date: Sep 2006
Member`s Gallery
Posts: 1,161
Is that a steel retainer?

That cam looks like it was hardened very deeply, is it 8620 steel? Is the gear a stock 12v gear like the cummins dodge engine uses?
  Reply With Quote
Old 06-24-2019, 09:36 AM   #39
CTDYoungGun
 
CTDYoungGun's Avatar

Name: CTDYoungGun
Title: Seth- Fuel Injection Guy
Status: Not Here
Join Date: Aug 2007
Location: Kansas City, Mo
Member`s Gallery
Posts: 1,550
Another quick thing to check is the front gear housing. If it isn't a genuine Cummins housing that could be your issue. A lot of the Asian knockoff housings aren't machined correctly and cause gear misalignment/ mesh issues as others have said.
__________________
Seth Farrell
Farrell Diesel Service
816-205-0757
  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 11:17 PM.

 


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2019, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com