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Camshaft lobe gone
https://www.slantsix.org/forum/viewtopic.php?t=6159		 Page 2 of 2
Author:  Rick Covalt [ Sat Jul 05, 2003 4:08 pm ]
Post subject:  Cam
Sorry to hear that it was the same cam. I did read about your engine going south I just didn't realize it was a .528 cam! Kinda makes you think doesn't it?

You didn't happen to pick yours up from Koller Dodge did you? Both of ours came from them.

I talked to Jim Cox about 2 weeks ago and he said he has 2 of them from Koller Dodge on his shelf. I'd be afraid to try another one. But I wonder if Doug would like to see one of those to see what the gears look like on them. They are probably from the same batch as ours were.

Later,
Rick
Author:  slantzilla [ Sat Jul 05, 2003 4:37 pm ]
Post subject: 
Mine came from the "Chicago Connection" and was bought about 5 years ago. A dealer search then showed that there were only 6 left in the whole country. I'm not sure where the ones Koller was selling came from, factory seconds MP decided to dump, maybe? We thought mine might be OK because it was older. We thought wrong.

I talked to Jim and John at Clay City last year and they had one 528 eat an oil pump gear in Michael Reese' Duster too.
Author:  Charrlie_S [ Sat Jul 05, 2003 4:59 pm ]
Post subject: 
You guys are getting me worried. I have two of the Koller Dodge cams, one in a motor, and one still in the box.
Author:  Tom Drake [ Sat Jul 05, 2003 6:24 pm ]
Post subject: 
We have two MP purple shaft .436/244.
Noticed that the oil passages are drilled differently on these cams. One lines up with the bearing holes the other one is not even close.

If you put the short side centered on the 12 o'clock position the one that lines up has the holes about the 8:30/2:30 position. The one that doesnt is about the 11/1 o'clock position.

Anybody know why?(Mechanical vs hydraulic) If you used a grooved bearing in the #4 position everything would be OK. If not you get no oil to the rockers.


Tom
Author:  Doc [ Mon Jul 07, 2003 9:40 am ]
Post subject: 
There have been lots of reports of poor quality control on the MP cams, I have not used them much so I have very little first hand info to base that claim on. I did have an MP 468 cam that had a big bow in it, run-out was .022 :shock:
I had a regrinder spend some time straightening it and he got the run-out down to .003 which was the best he could get, the unit was ground bent to begin with so all the journals would never be in line at the same time. :cry:
These days I grind cams on good used factory cores or buy new "semi-finished" blanks and start from there.

For Dennis, here is a link to a pressurized oiler I have used for the OP gear. It is easy to do this using a "6-hole" oil pump, harder to do with the 5-hole pumps.
http://www.slantsix.org/articles/oil-pu ... er-far.jpg
DD
Author:  Rick Covalt [ Wed Jul 09, 2003 7:09 am ]
Post subject:  Cam on the way
Doug,
Cam and the oil pump gear are in the mail UPS. Let me know what your thoughts are on them. I also sent you the shot lifter. I know you didn't need it but it made such a nice set with the missing lobe I thought I'd send it. HA! Ha!

Thanks,
Rick
Author:  Doc [ Wed Jul 09, 2003 8:43 am ]
Post subject: 
Thanks Rick,
I will do some measurements and let you know what I find out.
I would recommend that anyone using one of the MP cams spend some time lapping in the gear. Doing that will show any major mis-alignment and remove any hobbing roughness.

You may want to keep an eye on Dennis (Slantzilla). He just sent me info on a pretty nice looking Comp Cam. I will be interested how that cam performs.
DD
Author:  Rick Covalt [ Wed Jul 09, 2003 4:37 pm ]
Post subject:  Specs?
Hey Dennis,
Do the specs on this cam fall into the category of "If I tell you I'll have to kill you?" Or can you share them? I'm going to need to get a new camshaft sooner or later.

Thanks,
Rick
Author:  Rick Covalt [ Mon Aug 04, 2003 2:03 pm ]
Post subject:  New cam In
Folks,

Just a little update to all the camshaft "fun" we have been having. We installed the Racer Brown .460/264 cam in my son’s Dart Saturday a week ago, and it runs great. For how long is anyone’s guess! But it pulls very strong and I must say it feels almost as strong as the .528/284 cam that was wiped out. It's installed 4 degrees advanced.

We don't even have the electronic ignition system in yet. It's at the shop getting some "adjustments". But my son wanted to take it to a local car show and have a little fun with it. So we stuck in the points ignition system and off we went. It got some nice comments too.

We hope to get out to the test and tune at Mason Dixon in the next couple weeks. I'll let you know how it does.

Just for the record, it pulls really hard past 5500 RPM and when you hook 3rd gear it puts down a nice patch of rubber!! Cool!
It will be very traction limited on street tires. I guess a set of small slicks is next on the agenda?


Rick
Author:  Doc [ Mon Aug 04, 2003 3:43 pm ]
Post subject: 
Nice update Rick, what did you do for an oil pump?
Did you just install another hardened gear onto the one you were using?
Did you do anything different to break in the new cam?

Anyway, I had my local cam grinder check out the wiped-out 528 cam and the only two comments he had were:
- "What kind of oil was used to start the engine? Looks like some startup gulling."
- "I don't know why Mopar does not Parkerize their aftermarket cams, Parkerizing helps reduce the chance of gulling."
(This guy is few on words but I got his point.)

As I told you in an email, there looks to be a lot of pressure on the "nose" of the 528's lobes so coil bind or retainer interference to the top of the valve guide should be double checked. Now that you have less lift, this should not be an issue.

I have my fingers crossed for you. It is your turn for some good luck after all the bad luck you have had up ‘til now.
DD
Author:  Rick Covalt [ Tue Aug 05, 2003 7:34 pm ]
Post subject:  response
Doug,
We just installed a new gear on the old pump and cleaned it up real well. For break-in on this cam I did as you recommended in the e-mail. We lapped in new gear / cam (and this took a while longer than the previous cam) degreed the cam , 4 degrees advanced. Ran the valves cold and poured 4 quarts in the pan, and one right over the rocker arms and then fired her up. I ran it about 15 minutes at 1200-1400 rpm. Took it down the road and ran it another 10-15 minutes under medium load. We ran it about 75 miles with 10/40 oil and then switched to mobil one with a new filter. Checked the valves again and that's about it.

On the cam that failed we used either 10/30 or 10/40 and didn't do much different than the above. Both lifters and cam lobes and gears were coated well with the Mopar assembly lube they supplied with the cams. We didn't switch to synthetic oil until after 1500-2000 miles on the first failed cam.

Rick
PS. The original oil pump with the failed gear is in the mail to you for your inspection. Thanks
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