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Posted

Each diaphram cover has 4 screws. The upper right screw seen to take a star or allen wrench while the other 3 are Philips head. But I can't tell for the screw seems to have a center tip the stick out preventing the tool to slid into the head.

 

Is there such a tool with a center hole?

Posted

It is a security screw. Prevents tampering.

 

Use a pair of channel locks to remove & replace all the screws with S.S. allen heads.

 

Gary

Posted

Yeah, its a security head, to prevent tampering I guess. You can find them at any good hardware store up here in Canada I found them at princess Auto.

 

Brian

Posted
Tampering? What are they trying to prevent? Is there some performance enhancement they are trying to prevent?

 

mabbe trying to keep their dealers mechanics out? :whistling::confused24:

 

brian

Posted

If you have a decent hardware store nearby check them out. There are several in my area that sell the tamper proof drivers in the old nuts and bolts section. Sold as single units so you wouldn't have to buy the whole set, only the one you need.

Posted
It is a security screw. Prevents tampering.

 

Use a pair of channel locks to remove & replace all the screws with S.S. allen heads.

 

Gary

 

Thats what I used also.

Posted

I used an impact driver to remove the 3 philips screw and the vise grips to remove the other security screw. Of course there was one security screw that I could not get a good grip and I had to work on it for some time. Finally got it out. I'm going to replace them with SS allen heads.

 

I wanted to see the condition of the diaphrams to see if I need to order a new set. But all 4 looked looked really good, for being 20 years old, but then it only has 6700 miles on it and always stored in a heated garage.

 

Soon I'll be ready to attempt my 1st carb sync using sky_doc17s procedure.

Posted

I've routinely see 30 year old diaphragms that are just fine. I'm starting to suspect that most of the bad ones have been ruined by carburetor cleaner at some point.

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