Also, inside that tube that goes through the manifold is some kind of "Steel Wool" looking material. It has to be made from some kind of stainless to last so long. The purpose of this "Steel Wool" is to slow down the volume/amount of air being drawn into it so it will get the proper amount of heat needed to operate the choke. Otherwise the heat would not be enough to open the coil. And, yes, that is an aftermarket hot air choke set-up. To work properly the choke has to be loosened because it can't provide enough heat to work properly as OEM designed.
After measurements, I realised both manifolds were not trued up. So off they went to a local machine shop (ouch !! Paris is not known for cheap machine shops I found out)... Here they are. Can wait to sandblast them, coat and put them back on without gaskets ....
Do not use stainless bolts - they are not as strong as plain steel. I would use grade 8 steel bolts - Cadmium plated. We have two local hardware stores that sell them. The factory service manual specifies 10-15 ft/lbs torque for the 364-401-425. Oops! I forgot you are in France, Roland. 13.5 to 20 Newton-Meters.
when you put them back, first , wire brush the bolt threads and then put anti- seize compound on them... that insures in the future that you will not twist bolts off if you have to take the manifolds off again..... would not hurt to run a tap in the holes to clean them out.....
Thanks.. I'll ditch the stainless. What do you mean by "We have two local hardware stores that sell them" ? In the states ? In Mass ? In BuickV8 website ? You coming to Paris soon ? (hehe... could bring some bolts over !! I'll chill the wine).....p ---------- Post added at 11:15 AM ---------- Previous post was at 11:11 AM ---------- The bolts are quite rusty. I will try to clean up.. May try to find new ones. Its harder here (metric country).... I bought antiseize so I'll definetly put some on (a little .....or really soak the bolt ?). Not sure I have a tap for that boilt size... Make try to run a wire tooth brush in there and blow it out....
If you can tell me what size they are (I think 3/8" diameter, but I do not know the length) I can get you the bolts. Just one thing: I recently sent a clock to a friend of mine in Paris as a wedding present She has spent three weeks trying to get it out of customs. You would think that I was trying to overthrow the French government. And I have some French ancestry. BTW: I love French wines!
This is funnier: "Ultimate tensile strength(UTS) is a limit state of tensile stress that leads to tensile failure in the manner of ductile failure (yield as the first stage of that failure, some hardening in the second stage and breakage after a possible "neck" formation) or brittle failure (sudden breaking in two or more pieces at a low stress state). Tensile strength can be quoted as either true stress or engineering stress." :Smarty: - Bill
John, Thanks !!! I may take you up on that... should not have any issues with bolts for customs... Trick is not to put any huge value for the items so customs wont bother with it (but then it wont be insured for much either). Will pm you when I get around to measuring my bolts this weekend. Merci ... Roland
