Thicker Main Dowels for 12 Valve Cummins

T

Turbo1967

Turbo1967
Hello all,
A few months back I came across a YouTube video where someone was offering slightly thicker main cap dowels for the 12 Valve to help to reduce cap fretting in moderately higher horsepower applications rather than installing a main girdle. Does anyone know where to purchase these thicker dowels? I cannot seem to find the video.
Thanks!
 
Turbo1967 said:
Hello all,

A few months back I came across a YouTube video where someone was offering slightly thicker main cap dowels for the 12 Valve to help to reduce cap fretting in moderately higher horsepower applications rather than installing a main girdle. Does anyone know where to purchase these thicker dowels? I cannot seem to find the video.

Thanks!
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Am I allowed to call bullshit?


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biggy238 said:
Am I allowed to call bullshit?


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Well, I didn't imagine it. I remember the details, for moderate hp, girdle not needed, this guy was offering slightly thicker wall thickness dowells, that I guess were also a better material than stock.

I even made notes in my on-going journal to order them, but didn't write down the supplier.
 
I fail to understand how they would keep a block from twisting. They are merely an alignment dowel. Yes, an extremely important alignment, thus my argument would be not to replace any dowel unless they are damaged, especially in a engine that has run millions/billions of rotations. The original dowels will place the cap right back where it's been running happily for ever.
 
Turbo1967 said:
Well, I didn't imagine it. I remember the details, for moderate hp, girdle not needed, this guy was offering slightly thicker wall thickness dowells, that I guess were also a better material than stock.



I even made notes in my on-going journal to order them, but didn't write down the supplier.
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Well, It's flawed logic. Surface area Vs Clamp load dictates fretting or the lack thereof, not the dowel which would be in shear load by then.
I just don't see them being beneficial.

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Snedge said:
I fail to understand how they would keep a block from twisting. They are merely an alignment dowel. Yes, an extremely important alignment, thus my argument would be not to replace any dowel unless they are damaged, especially in a engine that has run millions/billions of rotations. The original dowels will place the cap right back where it's been running happily for ever.
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I would only consider this with the main surfaces were machines and resided. Sure as hell not a DIY retrofit.

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biggy238 said:
I would only consider this with the main surfaces were machines and resided. Sure as hell not a DIY retrofit.

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Right, like after an align hone when you're starting from scratch.
 
BigPapa said:
Not.

Not trying to get “preachy”, but it’s the holiest day for Christians, the day Jesus beat death and was resurrected from his tomb.
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totally agree with the philosophy...been to walmart lately. i havent been in a yr probly....but i remember....
 
Eggs are a holdover from a pagan ritual signifying new life. Same as the rabbit, both are seen as a sign of rebirth and fertility. Me personally, I like ham. Ham is a meat that represents naps.
 
my mothers 86...wanted pizza of all things..so we got pizza..lol...shes a whip...been awhile she said ...cracked me up...
 
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