Re: Bronze dizzy gear faliure in Hemi need help!
[Re: Teamx]
#1399676
03/09/13 11:55 PM
03/09/13 11:55 PM
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Joined: Mar 2007
Posts: 3,287 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,287
West Coast, USA
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Don't run too thick of oil, cut the relief spring down a bit, and be sure to run the collars on the distributor shaft. It helps keep the wear pattern more consistent.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Bronze dizzy gear faliure in Hemi need help!
[Re: Teamx]
#1399679
03/10/13 03:59 AM
03/10/13 03:59 AM
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Joined: Mar 2007
Posts: 3,287 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,287
West Coast, USA
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It's the thick oil you're running. Try a max of 10-30wt. You may need the extra volume with the thinner oil.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Bronze dizzy gear faliure in Hemi need help!
[Re: Teamx]
#1399680
03/10/13 04:00 AM
03/10/13 04:00 AM
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Joined: Mar 2007
Posts: 3,287 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,287
West Coast, USA
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When mine wears out, I'm going to have my next bronze gear cryogenically treated.
Also, I switched to the new Milodon pump body and am using the stock cover on it. It reportedly takes significantly less power to drive it due to a more pointed shape of the gerator lobes.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Bronze dizzy gear faliure in Hemi need help!
[Re: Teamx]
#1399682
03/10/13 04:29 PM
03/10/13 04:29 PM
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Joined: May 2005
Posts: 6,446 NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Although your posted oil pressure is a bit high, Im going against the grain here and saying its not the oil..... Ive run 20W 50VR1 in my own driver Challenger and the gear lasted years, I inspected it regularly, but there wasnt any appreciable wear. How many miles?? WAY more than 2000 and 10+ years. And I live in an area where I did start it on some pretty cold days. You live in Australia, so I assume you arent staring the car in zero degree temps.. I notice you are running a chrome sheetmetal timing cover. How are you controlling cam end play. If you think that cover wont deflect, you are wrong. Ill bet that cam is walking like crazy if you dont have something in front of that cover to limit endplay.. Edit: My apologies, I thought the pic another memnber posted was the OP's. Anyway, how are you(OP) controlling end play? What type of timing cover are you running? Look into that. MB
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Re: Bronze dizzy gear faliure in Hemi need help!
[Re: Teamx]
#1399684
03/10/13 05:29 PM
03/10/13 05:29 PM
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Joined: Jan 2003
Posts: 25,942 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,942
Rio Linda, CA
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With that kind of pressure I'd scrap the HV pump and go to a standard volume. It's obvious that the motor can't handle the volume being pumped and the excess volume is causing the high pressure.
A softer spring probably won't help because the relief valve, even wide open, can only handle so much volume.
The INTERNET, the MISinformation superhighway
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Re: Bronze dizzy gear faliure in Hemi need help!
[Re: John_Kunkel]
#1399685
03/10/13 07:21 PM
03/10/13 07:21 PM
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Joined: Jan 2005
Posts: 193 Australia
Teamx
OP
member
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OP
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Joined: Jan 2005
Posts: 193
Australia
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To reply to some of the answers. The bush in the block is now worn but I beleive this is a result of debris from the bronze gear getting in between the drive and the bush as the drive is marked up in that area. I have one of those Diamond roller thrusts on the front of the cam and a factory timming cover. The motor is a 557ci using a World block.
Last edited by Teamx; 03/10/13 07:23 PM.
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Re: Bronze dizzy gear faliure in Hemi need help!
[Re: Mopar-Al]
#1399688
03/10/13 10:40 PM
03/10/13 10:40 PM
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Joined: May 2005
Posts: 6,446 NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Quote:
factory cover and roller do not mix without support
Yep...that cam is deflecting that cover. If you dont believe it, install the cam and cover just take a long screwdriver and carefully see how easy and how far that cam will walk..
Here is what I do...
Install the cam without the cover and put some paint on the nose of the button. Install the water pump housing and push the cam forward until it contacts the back of the housing(paint will leave a mark).
Build up some weld(Ill start with a half dollar in diameter) and about 3/16" thick weld.
Install the cover with gasket and then the housing also with the gaskets. Obviously dont glue anything in place yet-this is the mock up phase. Usually in the beginning, you wont be able to get the housing on(weld too thick). Then just keep grinding that weld "button" down until you have the desired end play.
Takes a little time, but makes for a better stop.Or you can use one of Andy F's covers.>>I think they have a provision for obtaining end play.
MB
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