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Workshop => The Mad Scientist => Topic started by: croat1 on November 12, 2020, 09:37:08 AM

Title: Case filler
Post by: croat1 on November 12, 2020, 09:37:08 AM

Passing info along.  These case fillers are available from CP Industries.

Joe

Title: Re: Case filler
Post by: desertR on November 14, 2020, 09:03:04 PM

So I'm not really understanding the purpose of these ? Are they only needed for cases that are bored oversize for big bores ? Are they installed before the cylinder diameter in the case is machined ? Why dimple the cylinder side if it will be machined away ?If that is the case, then what is done with the open areas in the cylinder base, wouldn't you want fillers for those too ? Never seen them, but are they available ? If the base gasket can seal the base of the cylinder, then why wouldn't it seal the case also ?
desertR

Title: Re: Case filler
Post by: Piney0 on November 14, 2020, 10:38:11 PM

These are used for big bore cylinders on OEM cases. Mainly aluminum sleeved cylinders because of the extra thickness of the cylinder skirt.  The cases are bored out so much that something is needed to fill in that area of the cases.  I believe before these existed they just filled the area with epoxy and machined it out to the size required.

Title: Re: Case filler
Post by: desertR on November 14, 2020, 10:56:56 PM

OK i understand that, but what about the voids in the base of the cylinder ? Do those get filled in with epoxy ? Do these fillers have the same effect of filling in the holes in the crank with a nylon type of material (smaller crankcase volume) ?
desertR

Title: Re: Case filler
Post by: Piney0 on November 14, 2020, 11:08:23 PM

Those voids in the base of the cylinder should be blocked off with gaskets, and not open to the crankcase.