Crank Scrapers

MikeRenz

not stock
Anyone use them? I was thinking of making some and I found some online that show that they are in use by someone w/ 4.3s. I realize we'd need different ones for h-beam rods...but just curious if anyone here is using a scraper setup?

4-3%20scraper.jpg


4-3%20installed.jpg
 

warmpancakes

New member
Re: Crank Scrapers

MikeRenz said:
or make me a posterboard template and i'll make you a stainless one.


Game set match, I knew there was a reason I didnt send the manifold gaskets to you :tup:
 

epix

Typhoon
Re: Crank Scrapers

my engine and crank will be out soon so if you make these I'll be willing to purchase/test them (I have H-beams)
 

MikeRenz

not stock
Re: Crank Scrapers

epix said:
my engine and crank will be out soon so if you make these I'll be willing to purchase/test them (I have H-beams)
sounds good. I guess i'll pop my oil pan off and make a template.
 

MikeRenz

not stock
Re: Crank Scrapers

CKeith,
i'm not going to be able to make a template until sometime in august. If you want to make a template and send it to me that would speed up the process. I'm thinking something like $50shipped for these (Others i've found start at $60).
 

MRKING

New Parts for Old Trucks
Re: Crank Scrapers

Sign me up ! I know its weeks/months away , but I am interested when there ready .
 

Don W.

Stab it and steer it
Re: Crank Scrapers

DAQ I know every little bit helps but isn't this sort of thing used for much higher RPM's? On the other hand adding parts to a build always makes one feel better.:rotf: Kinda like me and my and my trip up the river Nile regarding my bad intake gasket.
 

MikeRenz

not stock
Re: Crank Scrapers

Why should I use a scraper or wiper ring?

The function of a scraper ring is to prevent dirt particles from entering the components in a hydraulic or pneumatic circuit; cylinders or valves. This helps prevent contamination of the media which will damage the seal, the surface of the housing and the guide bush.

Bellows provide a complete protection for reciprocating shafts, but they are complicated to produce and can be easily damaged so their use is restricted to special applications. In most cases a scraper ring having one-lip made of wear resistant elastomer, is sufficient.It is important to protect the scraping edge from damage and to have adequate contact with the groove and piston rod diameter.

The lip of the scraper ring is designed to have a pre-load with the piston rod, and this has an influence on the break-out friction. Together the pre-load and the sharp scraper edge wipes off the oil film passing the seal.

Scraper rings are made from elastomeric or thermoplastic materials and some have metal case for stiffness. Special designs are available for applications where, compensation for large radial movements or a stiffer inner lip is required.It is recommended to use scraper rings which are designed to be a tight fit in the housing.
 
Top