lost cam lobe on break in twice - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer lost cam lobe on break in twice

Print Thread

Page 1 of 3

1

2

3

lost cam lobe on break in twice #299209 04/25/09 07:46 PM 04/25/09 07:46 PM
Joined: Mar 2008 Posts: 38 Sharpsburg, GA R rusthole OP member
rusthole OP member R Joined: Mar 2008 Posts: 38 Sharpsburg, GA	I have tried to break in a mopar 509 cam (with revised centerline)twice now, each time I wore the tip off a lobe. A different lobe each time. No oiling problems, followed all the breakin rules, used oil with zinc and lubed it properly, read previous posts about breakin proceedures. My question- would I have better luck useing a different brand cam? Do some brands do better than others at breakin? What would be a comparable match in another brand? Thanks in advance.....

Re: lost cam lobe on break in twice [Re: rusthole] #299210 04/25/09 07:51 PM 04/25/09 07:51 PM
Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY H hemigod426 top fuel
hemigod426 top fuel H Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY	what are your open and seat pressures on srings and hieght. you might have too much spring for that cam MOPAR OR NO CAR

Re: lost cam lobe on break in twice [Re: rusthole] #299211 04/25/09 07:52 PM 04/25/09 07:52 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	If you took out the inner spring or if your spring pressure isn't too high I'd suspect the cam. I wont buy a MP cam(or valves) because of too many personal & purported failures. live every 24 hour block of time like it's your last day on earth

Re: lost cam lobe on break in twice [Re: rusthole] #299212 04/25/09 07:52 PM 04/25/09 07:52 PM
Joined: Jan 2003 Posts: 32,923 Grand Prairie,Texas stumpy I Win
stumpy I Win Joined: Jan 2003 Posts: 32,923 Grand Prairie,Texas	How tight do the lifters fit in the block? Are you lubing the bottom of the lifters and the lobes of the cam and if so what are you using?

Re: lost cam lobe on break in twice [Re: hemigod426] #299213 04/25/09 07:53 PM 04/25/09 07:53 PM
Joined: Feb 2004 Posts: 3,076 Renton, Wa. C Classof70Chally super gas
Classof70Chally super gas C Joined: Feb 2004 Posts: 3,076 Renton, Wa.	Been there, done that. Time for a roller.

Re: lost cam lobe on break in twice [Re: rusthole] #299214 04/25/09 07:53 PM 04/25/09 07:53 PM
Joined: Jan 2003 Posts: 2,343 west palm beach, florida modelmakerinc top fuel
modelmakerinc top fuel Joined: Jan 2003 Posts: 2,343 west palm beach, florida	Hi Rusthole, sorry to say but it may be the cam material. I wasted a MP 533 and I have a MP 509 going on me now. I am looking into a different brand Cam also I have not made up my mind so I'll follow this thread also Exceptional Architectural, Yacht and Automotive scale models. e-mail modelmakerinc@att.net for a portfolio review. www.modelmakerinc.com

Re: lost cam lobe on break in twice [Re: rusthole] #299215 04/25/09 07:56 PM 04/25/09 07:56 PM
Joined: Jan 2007 Posts: 160 Florida H hemisurfer member
hemisurfer member H Joined: Jan 2007 Posts: 160 Florida	I am running a higher lift Comp Cams solid lifter in my 440 stroker and have had zero issues. I am happy with Comp Cams, just a suggestion if your looking to switch to a another cam company. Last edited by hemisurfer; 04/25/09 07:57 PM. Chris

Re: lost cam lobe on break in twice [Re: modelmakerinc] #299216 04/25/09 08:09 PM 04/25/09 08:09 PM
Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY H hemigod426 top fuel
hemigod426 top fuel H Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY	Quote: Hi Rusthole, sorry to say but it may be the cam material. I wasted a MP 533 and I have a MP 509 going on me now. I am looking into a different brand Cam also I have not made up my mind so I'll follow this thread also ive done rockwell harness tests on cam cores their ok it was all the newer lifters that are a joke. most cam corps use all the same blanks for cams. all the good lifter corps are gone. crower makes nice stuff still MOPAR OR NO CAR

Re: lost cam lobe on break in twice [Re: rusthole] #299217 04/25/09 08:12 PM 04/25/09 08:12 PM
Joined: Mar 2008 Posts: 38 Sharpsburg, GA R rusthole OP member
rusthole OP member R Joined: Mar 2008 Posts: 38 Sharpsburg, GA	I have the "hemi" springs rated to .500 lift, so I guess I am slightly weak with the springs. I lubed the lifters on the bottom and sides and made sure they spin looslely. I have a standard valvetrain. Maybe I should upgrade to solid lifters if that helps? Need to get this thing going!

Re: lost cam lobe on break in twice [Re: rusthole] #299218 04/25/09 08:16 PM 04/25/09 08:16 PM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	did all your lifters spin when you spun the cam buy hand? i do this with only light oil on the lifters and lobes.

Re: lost cam lobe on break in twice [Re: hemigod426] #299219 04/25/09 08:19 PM 04/25/09 08:19 PM
Joined: Jan 2003 Posts: 2,343 west palm beach, florida modelmakerinc top fuel
modelmakerinc top fuel Joined: Jan 2003 Posts: 2,343 west palm beach, florida	Quote: ive done rockwell harness tests on cam cores their ok it was all the newer lifters that are a joke. most cam corps use all the same blanks for cams. all the good lifter corps are gone If the cam 's hardness is good but the lifters aren't then why does the cam lobe fail and not the lifter? Exceptional Architectural, Yacht and Automotive scale models. e-mail modelmakerinc@att.net for a portfolio review. www.modelmakerinc.com

Re: lost cam lobe on break in twice [Re: ademon] #299220 04/25/09 08:24 PM 04/25/09 08:24 PM
Joined: Nov 2005 Posts: 589 Fortworth TX M mod5v mopar
mod5v mopar M Joined: Nov 2005 Posts: 589 Fortworth TX	Sounds to me like you have a spring "coil bind" issue or the retainerss/keepers are hitting the valve guide. Did u make sure that your heads are set up to take the lift u are useing?.I would check this before putting a new cam in because u may just wipe out any brand if u have this problem and all the "modern" design cams have even more lift for the same duration.

Re: lost cam lobe on break in twice [Re: modelmakerinc] #299221 04/25/09 08:25 PM 04/25/09 08:25 PM
Joined: Mar 2008 Posts: 38 Sharpsburg, GA R rusthole OP member
rusthole OP member R Joined: Mar 2008 Posts: 38 Sharpsburg, GA	I had the lifter bottom go concave on me both times as well

Re: lost cam lobe on break in twice [Re: rusthole] #299222 04/25/09 08:29 PM 04/25/09 08:29 PM
A Anonymous Unregistered
Anonymous Unregistered A	i had a mp cam in a dakota with a 5.2l that was professionally installed and broke in. i had mp springs and the other goodies put in with it and it wore off 2 lobes within 2000 miles. i put in a summit cam and have since sold the truck due to the frame rotting out but it has 40000 on the summit cam and runs like a dream. now its someones firewood truck.

Re: lost cam lobe on break in twice [Re: modelmakerinc] #299223 04/25/09 08:31 PM 04/25/09 08:31 PM
Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY H hemigod426 top fuel
hemigod426 top fuel H Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY	Quote: Quote: ive done rockwell harness tests on cam cores their ok it was all the newer lifters that are a joke. most cam corps use all the same blanks for cams. all the good lifter corps are gone If the cam 's hardness is good but the lifters aren't then why does the cam lobe fail and not the lifter? cam/lifter falure starts with metal transfer from lifter to lobe, like pepper grain size then cam acts like lathe and cuts them both to death MOPAR OR NO CAR

Re: lost cam lobe on break in twice [Re: rusthole] #299224 04/25/09 08:47 PM 04/25/09 08:47 PM
Joined: Jan 2003 Posts: 4,712 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,712 Moved to N.E. Tennessee	Quote: I lubed the lifters on the bottom and sides and made sure they spin looslely. Do not lube the sides of the lifters with the thick break in paste. The paste is for the lifter face and cam lobes only. If you put it on the sides it can prevent the lifters from spinning enough. Motor oil is all you need on the rest of the lifter and the lifter bores in the block. There was a problem with bad lifters. Some were soft, some didn't have enough crown, some had the crown ground off center, and some were all of the above. If your lifters have been sitting on a dealers shelf for a few years, there's a good chance you got junk. I would only trust obviously very old lifters or very recent lifters. Last edited by GomangoCuda; 04/25/09 08:52 PM. In theory, there is no difference between theory and practice. In practice, there is.

Re: lost cam lobe on break in twice [Re: GomangoCuda] #299225 04/25/09 11:17 PM 04/25/09 11:17 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Lifter rotation problem. Dirt in the lifter bores/galleys, scoring, wrong lube on lifter walls ( previously stated ). A good test: With the side of the lifters and lifter bores lubed with light oil, they should slide down the lifter bores with only their own weight. If you can't acheive this, you might want to rent a broach and broach the lifter bores - I think hughes rents them. Fastest 300

Re: lost cam lobe on break in twice [Re: Crizila] #299226 04/26/09 10:04 AM 04/26/09 10:04 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: A good test: With the side of the lifters and lifter bores lubed with light oil, they should slide down the lifter bores with only their own weight. I use WD40 & during mockup lift the lifters up off of the lobes w a finger & it should fall down onto the lobe under its own weight with a "thunk" live every 24 hour block of time like it's your last day on earth

Re: lost cam lobe on break in twice [Re: rusthole] #299227 04/26/09 10:41 AM 04/26/09 10:41 AM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	Quote: I have the "hemi" springs rated to .500 lift, so I guess I am slightly weak with the springs. I lubed the lifters on the bottom and sides and made sure they spin looslely. I have a standard valvetrain. Maybe I should upgrade to solid lifters if that helps? Need to get this thing going! if those springs are set up for 1.88 installed heigth they will coil bind before .509 lift. those springs are obsolete.

Re: lost cam lobe on break in twice [Re: rusthole] #299228 04/26/09 10:54 AM 04/26/09 10:54 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Maybe I should upgrade to solid lifters if that helps? Need to get this thing going! I wouldn't, get a good cam & premium lifters(whatever these guys recommend) and a side note I always heard comp cams stuff was excellent but now I have heard of lifter problems with them live every 24 hour block of time like it's your last day on earth

Page 1 of 3

1

2

3

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1