Ground wire - Battery to Cyl head
#1
Ground wire - Battery to Cyl head
I went to put my battery ground to the stud on the driver side head and I am having trouble getting the nut to go onto the stud. I am almost certain this is the nut that came with the engine but the issue is that it will thread in until the nut is on the stud. But it wont go all the way down on the stud to tighten the ground wire. The nut gets stuck and it is way to hard to keep turning. I have tried this on both 455's I have and get the same result. I am using a 7/16-20 nut on these threads. Like I said, starts great and then gets super tight real quick. I bought new 7/16-20 nuts at Ace and just tried them and get the same result. I have put WD40 on the stud and then tried a little grease, still gets stuck...
So is 7/16-20 the right thread? If not, what is?
This just seems way tight for this nut to go on...
So is 7/16-20 the right thread? If not, what is?
This just seems way tight for this nut to go on...
#4
The studs on the heads are fine thread so definitely not a -16 thread. Just trying to remember if it is -20 or 28. If the car in question is a 69, the negative battery cable is supposed to connect to the front of the driver's cylinder head with a bolt that may be 3/8-16. A picture of what you are doing would be helpful.
#5
Whatever it is, i just got it to work...the one went on easier than the other. Both are on now. No cross threads. I just wanted to be sure I wasnt going to mess the threads up. Went on nicely. Part number from ACE is 806-J, which I am pretty sure I picked up out of the 7/16-20 box
Thanks for the help!
Doug
Thanks for the help!
Doug
#7
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We will be adding nitrous, superchargers and other performance items in the future. And some Oldsmobile crate engines at some point
#10
Nothing like a morning rant.
#12
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#13
#15
Nope. It's a hole in the block. But, as the others said, it's so hard to get to that most people use a hole in the front of the head instead.
It helps if you use the correct bolt. It has a thinner head than the typical 3/8 bolt. Without the thin head, it's hard to even get the bolt positioned straight to start it. Even with the thin head, you'll likely have to loosen the power steering pump. What makes it even more difficult is that you're trying to bolt on a stiff, thick-*** ground cable.
It helps if you use the correct bolt. It has a thinner head than the typical 3/8 bolt. Without the thin head, it's hard to even get the bolt positioned straight to start it. Even with the thin head, you'll likely have to loosen the power steering pump. What makes it even more difficult is that you're trying to bolt on a stiff, thick-*** ground cable.
Last edited by BlackGold; April 24th, 2014 at 01:58 PM.
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Tedd Thompson
Vintage Oldsmobiles
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July 25th, 2012 02:06 PM