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Wiped Out My Cam What To Look For As Cause #1486828 08/19/13 03:46 PM 08/19/13 03:46 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Driving my Bee home from a show a couple weeks ago, I noticed a tapping in the engine. I tore it open this weekend and the #8 exhaust lifter is concaved and looks like the lobe is shot. The engine is a 383 with MP 509 cam that was built 23 years ago and has about 10k on it. I just put a set of MP aluminum 452's on it a couple months ago (300 miles), stock rockers with correct length push rods. I am going to pull it clean it out and put another 509 in it for now, until my 489 stroker is done. I do not want it to happen again, What possible causes should I look for? Thanks. 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Wiped Out My Cam What To Look For As Cause [Re: runnerrt] #1486829 08/19/13 03:52 PM 08/19/13 03:52 PM
Joined: Sep 2004 Posts: 2,091 oberlin, Ohio Rapid340 top fuel
Rapid340 top fuel Joined: Sep 2004 Posts: 2,091 oberlin, Ohio	Could be that the new heads have spring pressure that is too high or some kind of interference or binding taking place. You are using good flat tappet oil I assume. 1971 Factory Appearing Duster 340 11.000 @ 122 mph

Re: Wiped Out My Cam What To Look For As Cause [Re: runnerrt] #1486830 08/19/13 03:58 PM 08/19/13 03:58 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	poor metallurgy. not enouugh zinc. poor breakin procedure. lifter not free (enough) to rotate in it's bore. too high of spring psi on breakin. 23 yrs is a long time/alot of history live every 24 hour block of time like it's your last day on earth

Re: Wiped Out My Cam What To Look For As Cause [Re: RapidRobert] #1486831 08/19/13 04:03 PM 08/19/13 04:03 PM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker super stock
rbstroker super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	The MP 452's (straight plug Eddy's) have a spring rate compatible with the 509 cam. After all those years, I would have to guess that you didn't have enough zinc additive after the last oil change. I use 1/2 bottle Lucas break-in additive with Rotella diesel oil. So far; so good. This is the land of the free because of the brave

Re: Wiped Out My Cam What To Look For As Cause [Re: rbstroker] #1486832 08/19/13 04:33 PM 08/19/13 04:33 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	I run Valvoline VR1 race oil, it claims to have high zinc content 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Wiped Out My Cam What To Look For As Cause [Re: RapidRobert] #1486833 08/19/13 04:35 PM 08/19/13 04:35 PM
Joined: Jan 2003 Posts: 74,976 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,976 U.S.S.A.	Quote: poor metallurgy. not enouugh zinc. poor breakin procedure. lifter not free (enough) to rotate in it's bore. too high of spring psi on breakin. 23 yrs is a long time/alot of history considering all he did was swapp heads , and an oil change , a lot of those issues really wouldn't/couldn't/shouldn't apply. Did you have the heads checked out before installing them or just ASSuME they were ready to go out of the box ?

Re: Wiped Out My Cam What To Look For As Cause [Re: JohnRR] #1486834 08/19/13 04:41 PM 08/19/13 04:41 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Quote: Quote: poor metallurgy. not enouugh zinc. poor breakin procedure. lifter not free (enough) to rotate in it's bore. too high of spring psi on breakin. 23 yrs is a long time/alot of history considering all he did was swapp heads , and an oil change , a lot of those issues really wouldn't/couldn't/shouldn't apply. Did you have the heads checked out before installing them or just ASSuME they were ready to go out of the box ? After the horror stories I have seen on here,I had them checked out and was told everything was good. 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Wiped Out My Cam What To Look For As Cause [Re: runnerrt] #1486835 08/19/13 04:47 PM 08/19/13 04:47 PM
Joined: Jan 2003 Posts: 74,976 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,976 U.S.S.A.	In that case it was either the oil , doesn't take long for the lifter and cam nose to go away once the metal transfer starts , or the lifter stopped rotating , obviously , for some reason. New pushrods ? How much preload ?

Re: Wiped Out My Cam What To Look For As Cause [Re: runnerrt] #1486836 08/19/13 07:07 PM 08/19/13 07:07 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	after 23 years probably enough dry starts to start some cam wear then it all of the sudden goes like crazy!

Re: Wiped Out My Cam What To Look For As Cause [Re: Dodgem] #1486837 08/19/13 07:50 PM 08/19/13 07:50 PM
Joined: Oct 2005 Posts: 4,942 WI Dcuda69 master
Dcuda69 master Joined: Oct 2005 Posts: 4,942 WI	My buddy lost his MP .528 solid after many years and many miles. He had not touched a thing and poof one day lobes gone bye-bye. Think strongly about a roller for your new build

Re: Wiped Out My Cam What To Look For As Cause [Re: Dcuda69] #1486838 08/19/13 08:55 PM 08/19/13 08:55 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Did you measure the retainer to guide clearance at max lift? Just a thought. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: Wiped Out My Cam What To Look For As Cause [Re: JohnRR] #1486839 08/19/13 09:04 PM 08/19/13 09:04 PM
Joined: Feb 2005 Posts: 550 Lakewood, Colorado R runnerrt OP mopar
runnerrt OP mopar R Joined: Feb 2005 Posts: 550 Lakewood, Colorado	Quote: In that case it was either the oil , doesn't take long for the lifter and cam nose to go away once the metal transfer starts , or the lifter stopped rotating , obviously , for some reason. New pushrods ? How much preload ? They were Rhodes lifters And they call for at least .031 preload and prefered .0625 to .125 and the push rods were ordered for .0625 1969 Super Bee High School car I got back 2004 Ram 2500

Re: Wiped Out My Cam What To Look For As Cause [Re: Rapid340] #1486840 08/19/13 09:13 PM 08/19/13 09:13 PM
Joined: Jan 2003 Posts: 15,311 Omaha Ne T TJP I Live Here
TJP I Live Here T Joined: Jan 2003 Posts: 15,311 Omaha Ne	OIL or you have Quote: some kind of interference or binding taking place or as other have said the lobe was weak, new spring pressure finished it off. www.tandmautomotive-omaha.com

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