All around mj Posted January 22, 2021 Share Posted January 22, 2021 Would anybody happen to know how to free up the vacuum fittings in the Intake manifold. I don’t like my current rigged setup. Link to comment Share on other sites More sharing options...
Tex06 Posted January 22, 2021 Share Posted January 22, 2021 I used a little heat on the manifold and some Pblaster on the fitting. Be gentle Link to comment Share on other sites More sharing options...
All around mj Posted January 23, 2021 Author Share Posted January 23, 2021 1 hour ago, Tex06 said: I used a little heat on the manifold and some Pblaster on the fitting. Be gentle I will give it a shot Link to comment Share on other sites More sharing options...
schardein Posted January 23, 2021 Share Posted January 23, 2021 I've never had an issue getting them out. If it's stuck, I'm sure some heat would help. If you need the fitting in the top photo, I'm sure I have some spares. Link to comment Share on other sites More sharing options...
All around mj Posted January 23, 2021 Author Share Posted January 23, 2021 @schardeinyes the fitting in the top photo is what I am needing. If you do have a spare that you would be willing to let go of I surely would appreciate it. Link to comment Share on other sites More sharing options...
AZJeff Posted January 23, 2021 Share Posted January 23, 2021 The fittings are steel, and the manifold is aluminum. Apply heat to the manifold, not the fitting. The manifold will expand faster than the fitting, loosening the grip of the threads. Link to comment Share on other sites More sharing options...
All around mj Posted January 23, 2021 Author Share Posted January 23, 2021 I’ve done some recent searching of the webs for extra ideas as well and found that some people have made a home brew release penetrant of 50/50 ATF and acetone, which they claim works better than any store bought product. I’m wondering if I apply heat and put a bit of the concoction on if it will work it’s way into the threads to help with the efforts? Link to comment Share on other sites More sharing options...
cruiser54 Posted January 23, 2021 Share Posted January 23, 2021 Never EVER had an issue. I used to strip all the intake manifolds of fittings before scrapping them. They're tight, in a tapered pipe thread, with sealant on them that's been around since Moby Dick was a minnow..... Link to comment Share on other sites More sharing options...
BeatCJ Posted January 23, 2021 Share Posted January 23, 2021 9 hours ago, All around mj said: I’ve done some recent searching of the webs for extra ideas as well and found that some people have made a home brew release penetrant of 50/50 ATF and acetone, which they claim works better than any store bought product. I’m wondering if I apply heat and put a bit of the concoction on if it will work it’s way into the threads to help with the efforts? Yes it will. It's possible that if you have a problem you may need to cycle it a few times. How are you applying heat? On some things, it may be necessary to use higher heat, maybe as much as oxy-fuel, instead of a straight propane torch. I would guess you have a bi-metallic corrosion issue, that there was no sealant used on the threads, and that's causing your issue. Is your problem with the current fitting, or the OEM unit you want to use? Link to comment Share on other sites More sharing options...
phatton Posted January 23, 2021 Share Posted January 23, 2021 Acetone is very flammable . I would not use any open flame around it. Link to comment Share on other sites More sharing options...
schardein Posted January 23, 2021 Share Posted January 23, 2021 15 hours ago, All around mj said: @schardeinyes the fitting in the top photo is what I am needing. If you do have a spare that you would be willing to let go of I surely would appreciate it. PM sent Link to comment Share on other sites More sharing options...
All around mj Posted January 23, 2021 Author Share Posted January 23, 2021 I’m going to guess that one of the previous owners of the engine must have removed the fitting a time or two or this one never got anything put on the threads. All other fittings came off of all my other areas, including my renix manifold, well, I haven’t tried the steel one in the same area on the renix I’m afraid of tearing it up since it may be needed by myself or someone else later. Link to comment Share on other sites More sharing options...
All around mj Posted January 23, 2021 Author Share Posted January 23, 2021 @BeatCJ I know all too well about the steel/aluminum cross corrosion. I’ve changed a thermostat where the bolt and housing had become married at the top hole. Link to comment Share on other sites More sharing options...
AZJeff Posted January 23, 2021 Share Posted January 23, 2021 Heat (and plenty of it) should do the trick quite nicely. If you want, you can squirt some penetrating oil or acetone/ATF mix and let it sit for a day. Be sure to use a BOX wrench or deepwell socket when turning the fitting, so it distributes the torque force on all six points of the hex. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 23, 2021 Share Posted January 23, 2021 Just use a box end wrench if possible. eat your Wheaties for breakfast..... Link to comment Share on other sites More sharing options...
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