GolfVenture Posted October 30, 2011 Share #1 Posted October 30, 2011 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? Link to comment Share on other sites More sharing options...
dingy Posted October 30, 2011 Share #2 Posted October 30, 2011 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 Link to comment Share on other sites More sharing options...
friesman Posted October 30, 2011 Share #3 Posted October 30, 2011 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 Link to comment Share on other sites More sharing options...
GolfVenture Posted October 30, 2011 Author Share #4 Posted October 30, 2011 Tampering? What are they trying to prevent? Is there some performance enhancement they are trying to prevent? Link to comment Share on other sites More sharing options...
friesman Posted October 30, 2011 Share #5 Posted October 30, 2011 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? brian Link to comment Share on other sites More sharing options...
Snaggletooth Posted October 30, 2011 Share #6 Posted October 30, 2011 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. Link to comment Share on other sites More sharing options...
CrazyHorse Posted October 30, 2011 Share #7 Posted October 30, 2011 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. Link to comment Share on other sites More sharing options...
CrazyHorse Posted October 30, 2011 Share #8 Posted October 30, 2011 Thats what I used also. I also ground off the head with dremel but you risk scuffing the covers. Link to comment Share on other sites More sharing options...
Venturous Randy Posted October 30, 2011 Share #9 Posted October 30, 2011 You will probably have to use the vise grips on the other screws also. RandyA Link to comment Share on other sites More sharing options...
GolfVenture Posted October 30, 2011 Author Share #10 Posted October 30, 2011 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. Link to comment Share on other sites More sharing options...
MiCarl Posted October 30, 2011 Share #11 Posted October 30, 2011 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. Link to comment Share on other sites More sharing options...
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