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WD-45 Manifold Studs

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Greg

01-16-2004 15:18:10

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I have to put new manifold gaskets on my 45... Are there any hot tips on taking out the studs to replace those, as well?

Greg

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Bill

01-21-2004 10:16:57

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Re: WD-45 Manifold Studs in reply to Greg, 01-16-2004 15:18:10

I've used the old paraffin wax (same stuff the women use for canning) trick successfully several times with these. Heat the nut until the wax melts, dont' get it too hot or the wax evaporates/burns. The melted wax will follow the threads in a capillary action and soak into the rust, essentially breaking the rust bond and providing lubrication. You should be able to break the nuts loose with a wrench or vice-grips. Do a repeat performance on the head when removing the studs, remembering to heat the block not the stud. This will require draining the block also. I use 18-8 stainless steel studs (with teflon tape or a decent pipe sealer) and oversize ss nuts on the one's I've done and so far it's worked well. Quite often you'll find that either the manifold or head or both will been eaten away especially if the old girl has been in need of gaskets for any length of time. This is not serious or overly expensive, but requires removing the head and having the ports on the manifold and head milled flat. A new manifold if necessary can be found for $125 or so. Hope this helps. Bill

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Brian G. NY

01-17-2004 17:01:52

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Re: WD-45 Manifold Studs in reply to Greg, 01-16-2004 15:18:10

While you're at it, check the condition of the mating surfaces on the manifold; they sometimes rust away and don't seal well. Minor cases can be "starightened out" by carefully using a very large flat file and lots of elbow grease. Those with more serious problems can be fixed at a machine shop with a milling machine.

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Ron

01-16-2004 19:15:55

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Re: WD-45 Manifold Studs in reply to Greg, 01-16-2004 15:18:10

I think that you may get them out ok, after you get the manifold off, with vise-grips..

I highly recommend using High-Temp Silicone on the threads on the studs, and ---Rub the High-Temp silicone INTO the asbestos gaskets.

This will keep them in place on the manifold, and also hold the metal cups in place, too when you slide the manifold in place, they stay on..!! It also helps keep the asbestos from blowing out.. The last time I put mine on, I used hard bolts with washers, and it worked fine.. I like to use at least 2 washers, and anti-seize compound on the nuts, to make them stay in condition to remove next time...!! Tighten the studs evenly, and don't try to get them TOO tight...The manifold has to move as it heats, and cools or it will crack...!!

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Jim E

01-16-2004 18:15:32

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Re: WD-45 Manifold Studs in reply to Greg, 01-16-2004 15:18:10

1) Drain the radiator fluid. The studs are located in a coolant passage.
2) 3/8 or 1/2 drill with bit and tap for the broken stud you will have to replace after trying a torch, vise grips and your favorite penetrating oil.
Some people get lucky and wrench them out though.

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Greg

01-21-2004 19:09:23

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Re: Re: WD-45 Manifold Studs in reply to Jim E, 01-16-2004 18:15:32

Thanks for the help, guys... I was able to get all bu 2 of the nuts off today with just the wrench. I haven't tried the studs, yet, but I'll have to get the last 2 nuts taken off before I worry about the studs. I'm not too confident that I'm not going to have take the head off and have everything machined, though(I was fully prepared to do the manifold).

Who has the stainless studs, Bill? That sounds like an excellent idea. I've not seen any locally that were long enough.

Thanks again,

Greg

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