When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I know plastics or polymer these days are incredibly robust. Putting the opinion of the mechanic on the video aside, would fitting metal anti-rotation collars make more engine noise.
No they wouldnt. The roller cammed domestic car engines often ran figure fork shaped or figure eight shaped sintered metal collars with a spring loaded spider applying pressure to keep them down in place around the lifter body.
Last edited by hellonewman; Mar 4, 2018 at 06:52 AM.
The apparent carbon scaling on the piston and small wear area, is that within the realm of normal on any engine ? "I'm asking cause I don't know", thanx.
The apparent carbon scaling on the piston and small wear area, is that within the realm of normal on any engine ? "I'm asking cause I don't know", thanx.
The tiny oval silver spot is deliberate on many new pistons (the measurement area for skirt size and piston fit) and the black area is an anti-wear / friction reduction coating that Ive had applied to some race engine builds but I cant say it does anything. You can see the black is thinning in a large oval pattern around the measurement mark which is the widest part of the piston skirt and is also expected over time. I see no scuffing in the limited angles the video shows so piston to wall clearance was correct and the carbon on the piston could be from a tune that was fat on the mixture. Its not oil consumption carbon buildup.
"Plastic" lifter anti-rotation collars are common place inside mass produced car and truck engines. Plastic timing chain hydraulic tensioners are used on pretty much every engine Ford produces going back at least 15 years now and they dont break or fall apart. Plastic intake manifolds, valve covers and oil pans too.
many of us having dealt with the cam tensioner shoes on the Twin Cams, anytime I hear 'plastic' in a HD engine I cringe a bit.
I don't own an M8 and am trying to learn more about the engine. Each generation seems to have its Achilles heel....have been wondering what it is for the M8.
Back yard indy trying to claim he knows better. No wonder his is apart . Wrong person working on it. But that is the cause of most HD issues.
Michael is a professional motorcycle drag racer and has one of the best indy shops in the country.
The M8 is a piece of sh_t and he's not the only one saying it.
Lots of motor builders are shaking their heads at the poor design and even poorer build quality of the junk that is currently coming out of Milwaukee.
In it's stock form it's gonna perform as the TC did and the 88. The racing form as in other
forms of racing won't mirror the stock form. In sprint cars the Chevy,Ford ,Toyota are nothing more than a branded name . What wins on the track on Sunday sells on the show room on Monday, left a long time ago.If you ride a Harley and plan on doing so for any time period. You might as well get used to the M8,It's not going anywhere.
many of us having dealt with the cam tensioner shoes on the Twin Cams, anytime I hear 'plastic' in a HD engine I cringe a bit.
I don't own an M8 and am trying to learn more about the engine. Each generation seems to have its Achilles heel....have been wondering what it is for the M8.
Thats different and I wont argue that the shoe is wearing prematurely. Using plastic is fine if its not used beyond its capabilities where too much pressure and constant friction is applied. The timing chain tensioner arms and guides in any car engine do wear (but not in short order like the above pic).
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
