Parent metal bearings.....
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Outstanding HDF Member
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RE: Parent metal bearings.....
07 Dyna's were the only 07's. All the 08's have 'no bearings' in the cam plate. I'm not saying it was a mistake...just that the repair bill will be significantly higher and with the heat issues I just hope moco did their homework. I'm not sure you can compare car engines to the 96's of harley. I'd have no prob buying an 08 but would be damn sure I ran the best oil I could and ran the oil at the proper level.
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Joined: Jan 2006
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From: Alaska
RE: Parent metal bearings.....
Had someone puke a cam on a ride this week. His bike is an 06. Some know-it-all started carrying on about no cam bearings and that's why it failed.
I did not dig into the manual yet, but something about his rant did not ring true. But this guy is a regular drama queen anyway.
Thanks for the info on model years.
I did not dig into the manual yet, but something about his rant did not ring true. But this guy is a regular drama queen anyway.
Thanks for the info on model years.
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Joined: Apr 2006
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From: Georgia
RE: Parent metal bearings.....
ORIGINAL: raporte
07 Dyna's were the only 07's. All the 08's have 'no bearings' in the cam plate. I'm not saying it was a mistake...just that the repair bill will be significantly higher and with the heat issues I just hope moco did their homework. I'm not sure you can compare car engines to the 96's of harley. I'd have no prob buying an 08 but would be damn sure I ran the best oil I could and ran the oil at the proper level.
07 Dyna's were the only 07's. All the 08's have 'no bearings' in the cam plate. I'm not saying it was a mistake...just that the repair bill will be significantly higher and with the heat issues I just hope moco did their homework. I'm not sure you can compare car engines to the 96's of harley. I'd have no prob buying an 08 but would be damn sure I ran the best oil I could and ran the oil at the proper level.
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Cruiser
Joined: Apr 2006
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From: Georgia
RE: Parent metal bearings.....
With the '06 model year, H-D launched the new Dyna Glides, which featured a completely redesigned camshaft system. Roller chains and sprockets that are similar in design to a drive chain and traditional sprocket replaced the Hyvo chains. Instead of spring-loaded tensioners, the new units use hydraulically activated tensioners that operate in a similar fashion to a lifter (tappet). The two case bearings were increased to 1-inch diameter, and the cam plate no longer contained any bearings. Instead, the camshafts rotate in well-lubricated aluminum journals. These plain cam bearings were designed to reduce complexity, run more quietly, and increase durability. Perhaps the greatest improvement comes from a redesigned oil pump, residing in a new cam support plate, that provides 10-percent more oil flow while adding 23-percent scavenging ability. This is a good thing, as the bike's lifeblood gets into the motor faster while removing power-robbing oil more quickly from the crankcase. Due to the aforementioned changes, new, lighter camshafts were also employed.
In typical Harley-Davidson fashion, it turns out that the '06 Dynas were the testbed for things to come. All of the '07 Twin Cams now have the same cam components that debuted on those Dynas. As of press time, H-D doesn't offer those '06/'07 parts to retrofit earlier Twinkies. We don't know if they will, but Andrews Products has designed cams and other integral parts to combine with factory H-D parts to convert any Twin Cam into '07 specs.
In typical Harley-Davidson fashion, it turns out that the '06 Dynas were the testbed for things to come. All of the '07 Twin Cams now have the same cam components that debuted on those Dynas. As of press time, H-D doesn't offer those '06/'07 parts to retrofit earlier Twinkies. We don't know if they will, but Andrews Products has designed cams and other integral parts to combine with factory H-D parts to convert any Twin Cam into '07 specs.
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From:
RE: Parent metal bearings.....
OOps..I meant the 06 Dyna's and all 07's...... It relies on oil film strength to lubricate and separate the cams from the support plate. American Iron (Oct 2007) has good writeup on the 96 TC's.