1970mcss Posted February 9, 2018 Share Posted February 9, 2018 I'm trying to remove my brake booster to get it rebuilt and refinished. I got the master cylinder off no problem but the four nuts that hold the booster on, not so much. I have sprayed it with some wd40 a few times but the nuts seem to want to strip. Does anyone have any hints? Quote Link to comment Share on other sites More sharing options...
Rock Posted February 9, 2018 Share Posted February 9, 2018 Dp Quote Link to comment Share on other sites More sharing options...
Rock Posted February 9, 2018 Share Posted February 9, 2018 I used heat and a boxed end wrench with a pipe fit over the wrench for leverage but after 409 I wouldn’t add heat. The lower 2 were really a challenge! Quote Link to comment Share on other sites More sharing options...
1970mcss Posted February 9, 2018 Author Share Posted February 9, 2018 Can you explain what 409 is??? Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted February 9, 2018 Share Posted February 9, 2018 Use PB Blaster. Also, only use 6 point sockets/wrenches. Just a stupid question because I can't remember how I removed mine but I don't think the booster is mounted on studs but the bolts actually pass through the firewall and you have to have wrenches on the interior firewall and engine compartment firewall. If that is the case that bolts are not studs but in fact bolts you and they are rusted on you could just cut them off with a dremel tool. Last I heard, 409 was a cleaner, not a rust remover but I could be wrong. rob Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted February 9, 2018 Share Posted February 9, 2018 Been a while since I've done one but I'm thinking they may be pressed in bolts/studs in the booster. If the whole stud is turning you'll have to find a way to hold them somehow. Quote Link to comment Share on other sites More sharing options...
monte70car Posted February 9, 2018 Share Posted February 9, 2018 They are studs with nuts. The studs are pressed through the bracket that holds the brake pedal in place. A long reach wrench is key so you can apply more torque. 1 Quote Link to comment Share on other sites More sharing options...
1970mcss Posted February 9, 2018 Author Share Posted February 9, 2018 They are studs, i will try to soak them and try a 6 point wrench Quote Link to comment Share on other sites More sharing options...
MCfan Posted February 9, 2018 Share Posted February 9, 2018 Paul, I second the use of PB Blaster and a long box end wrench to break them loose but I also found that this was a perfect place to use my 9/16'" ratcheting box end Gear Wrench. The head was trim enough to access even the lower nuts and the 5 degree minimum ratcheting angle saved me a lot of wrench handling gymnastics. Good luck. Quote Link to comment Share on other sites More sharing options...
Leghome Posted February 9, 2018 Share Posted February 9, 2018 My son in-law ans I used a variety of wrenches getting mine off at Christmas time from the ratcheting end wrench to a stubby wrench. Very time consuming especially with the hood on. So not looking forward to the reinstall but that will come in March after I get it booster back from having it restored. We still have to install the dash with the new Dakota Digital display 1 Quote Link to comment Share on other sites More sharing options...
Michael Boyte Posted February 9, 2018 Share Posted February 9, 2018 Larry, your car was super nice the last time I saw it. I look forward to seeing all of the recent updates that you and Jamie have done. Quote Link to comment Share on other sites More sharing options...
John S Posted February 9, 2018 Share Posted February 9, 2018 You may think this sounds crazy but ammonia works on rusted and stuck nuts. I have used it many times at work successfully. John S Quote Link to comment Share on other sites More sharing options...
Canuck Posted February 10, 2018 Share Posted February 10, 2018 Step one: Remove front clip. LOL 1 Quote Link to comment Share on other sites More sharing options...
Leghome Posted February 10, 2018 Share Posted February 10, 2018 another thing that works on rust is white vinegar Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted February 10, 2018 Share Posted February 10, 2018 PB Blaster is my favorite rust remover. Quote Link to comment Share on other sites More sharing options...
1970mcss Posted February 10, 2018 Author Share Posted February 10, 2018 Well after 5 hours and some pb blaster and a whole lot of patience I got those 4 little stinkers off. Of course the two on the hinge side both stripped out. What a pain in the back.... Now to get all the black paint off and get it and the master cylinder rebuilt and re-plated Quote Link to comment Share on other sites More sharing options...
willie Posted February 12, 2018 Share Posted February 12, 2018 Where is everyone having there power booster restored? I didnt have any problems taking the booster off, i pb them and the next day i used a 6 pt with 12inch ext and they came right off. Quote Link to comment Share on other sites More sharing options...
Leghome Posted February 12, 2018 Share Posted February 12, 2018 Mine is being done in California by Steve Gregori. Should be back in about a month Quote Link to comment Share on other sites More sharing options...
1970mcss Posted February 12, 2018 Author Share Posted February 12, 2018 Larry, when did you send it?? Steve told me he was about 2 months out Quote Link to comment Share on other sites More sharing options...
1970mcss Posted February 12, 2018 Author Share Posted February 12, 2018 Where is everyone getting there master cylinders re-done?? Quote Link to comment Share on other sites More sharing options...
Katman Posted February 13, 2018 Share Posted February 13, 2018 I used a really long box end wrench. It helped to have the hood off of the car when I did it. Quote Link to comment Share on other sites More sharing options...
Leghome Posted February 13, 2018 Share Posted February 13, 2018 I sent the booster out between Christmas ans new years Quote Link to comment Share on other sites More sharing options...
B-Man Posted March 7, 2022 Share Posted March 7, 2022 Just adding to the "brake booster knowledge base" here. I just installed a booster from OReillys today ($120). While trying to get the old one out, I was initially really annoyed by the lack of access to the retaining nut. I had to walk away for a bit. Two key pieces of advice to aid in removal: 1) Remove the back hinge/fender bolts, allowing the hood to tilt down and shift forward. This IMMENSELY improves access to the nuts. 2) Use a ratcheting closed end 9/16 wrench to break the nuts loose and remove them. if needed, use a longer open end wrench on the closed end of the wrench, with the wrench to wrench leverage technique, to break them loose. The whole replacement took about 45 minutes once I figured out how to get the nuts off. 1 Quote Link to comment Share on other sites More sharing options...
1970mcss Posted March 7, 2022 Author Share Posted March 7, 2022 Good tip, I did mine a while back and really struggled getting the old booster off Quote Link to comment Share on other sites More sharing options...
Dtret Posted March 7, 2022 Share Posted March 7, 2022 I dont get all the complaining. Mine was no problem. No special wrenches, no sore back and no busted knuckles. Just do it like I did mine. Easy peasy. Lol. Sorry had to. 1 1 Quote Link to comment Share on other sites More sharing options...
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