inner primary bolt tab washers
- Thread starter acadian
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I think I see what you are thinking. Unless you have upgrades your case by adding threaded inserts to retain the inner primary, you are limited to the torque you can apply to create the sealing effect from the copper washers.
There was never a critical structural need to support the primary inner at the case, however the increasing subject of creating a seal point to help keep oil out of the dry primary cavity creates a need.
I think it is safe to say, torque won't do it. If not copper washers, perhaps rubber impregnated sealing washers like the petcock type might be in order. Of course the need for protection in regards to the tabbed washer is realized and should not be discarded.
As far as sealing the stock threads as is sits, an RTV of almost any type should do or maybe even Permatex #2.
Anyhow, threaded inserts in this application are awesome. Not to get away from your topic, but anyone who may have their cases split should seriously consider doing this simple and highly effective modification. Drill it, tap it, set em in with JB. You can get them at any hardware store for 50 cents a piece. I think it is safe to say that you can add 50% more torque to the fasteners, if not doubled.
There was never a critical structural need to support the primary inner at the case, however the increasing subject of creating a seal point to help keep oil out of the dry primary cavity creates a need.
I think it is safe to say, torque won't do it. If not copper washers, perhaps rubber impregnated sealing washers like the petcock type might be in order. Of course the need for protection in regards to the tabbed washer is realized and should not be discarded.
As far as sealing the stock threads as is sits, an RTV of almost any type should do or maybe even Permatex #2.
Anyhow, threaded inserts in this application are awesome. Not to get away from your topic, but anyone who may have their cases split should seriously consider doing this simple and highly effective modification. Drill it, tap it, set em in with JB. You can get them at any hardware store for 50 cents a piece. I think it is safe to say that you can add 50% more torque to the fasteners, if not doubled.
acadian
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pete.v said:
Yes, sealing in a dry primary is the primary motivation, and I've considered helicoil inserts but am not splitting the cases at this time, and don't want to deal with having to get the swarf out of the case after drilling/tapping. My thought is that the tabbed washers provide no sealing whatsoever, and only double the amount of surface area to potentially leak from. I'm going to try without them, using a dab of loctite and annealing the coper washers to get them nice and soft, shouldn't take much torque at all to get them to seal
DogT
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I replaced the bolts and tabs with studs and nuts. 2 of the studs/nuts will have to be shortened to clear the chain. I didn't drill or tap anything, just used studs and red locktite in the case, blue locktite inside the primary for the nuts. Ala hobot, remember him?
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