NPT plug size in LT1 heads? Is it 1/4"-20?
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02-01-2011, 08:12 PM
#8
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Egh! I'm an idiot there is no way it is 1/4. There is a guy that listed the parts he used from summit to change his steam pipe over to a braided hose setup. He had the NPT listed as 1/4.
02-01-2011, 08:52 PM
#16
In the world of plumbing pipe, "1/4" inch indicates the inside diameter of a pipe. The outside diameter of that pipe would obviously be bigger. This is why you think it's more than 1/4 inch. You are/were thinking of a 1/4 inch hardware bolt which is much smaller.
Z8's is correct. While it is considered a pipe thread, it's straight, not tapered like a regular pipe fitting. This is why the crossover fittings have seals on them. If it was a tapered pipe thread, they would not need a seal like the coolant temperature sensor in the head.
Z8's is correct. While it is considered a pipe thread, it's straight, not tapered like a regular pipe fitting. This is why the crossover fittings have seals on them. If it was a tapered pipe thread, they would not need a seal like the coolant temperature sensor in the head.
02-02-2011, 08:17 AM
#17
^ Just went through this crap with mine.
Yes, it's a 1/4" NPSF thread. Just like a pipe thread, but straight instead of tapered.
Using a 1/4" NPT tap, you can convert easily to doing -AN fittings.
There are a few write-ups here and there for it. I know Speed Density did one awhile back that I pretty much followed to the T. I think the shopping list is as follows, but you can do it your own way also:
(2) 1/4" NPT to -6 AN (Male-Male)
(2) -6AN to push-lok 90* elbow (Female-Male)
(3) Push-lok to -6 AN straight (Male-Female)
(1) -6 AN "Tee" (All male)
~6-8 feet of -6 push-lok hose
Aeroquip makes the push-lok stuff, and summit has their own brand of it as well. You push the hose right on and forget about it. No clamps needed.
I had to re-do a section of mine (not long enough) and all I had to do was cut it at the fitting with a razor knife, then pull it off with pliers (and used a heat gun to make it a bit easier).
Yes, it's a 1/4" NPSF thread. Just like a pipe thread, but straight instead of tapered.
Using a 1/4" NPT tap, you can convert easily to doing -AN fittings.
There are a few write-ups here and there for it. I know Speed Density did one awhile back that I pretty much followed to the T. I think the shopping list is as follows, but you can do it your own way also:
(2) 1/4" NPT to -6 AN (Male-Male)
(2) -6AN to push-lok 90* elbow (Female-Male)
(3) Push-lok to -6 AN straight (Male-Female)
(1) -6 AN "Tee" (All male)
~6-8 feet of -6 push-lok hose
Aeroquip makes the push-lok stuff, and summit has their own brand of it as well. You push the hose right on and forget about it. No clamps needed.
I had to re-do a section of mine (not long enough) and all I had to do was cut it at the fitting with a razor knife, then pull it off with pliers (and used a heat gun to make it a bit easier).
02-02-2011, 08:29 PM
#18
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^ Just went through this crap with mine.
Yes, it's a 1/4" NPSF thread. Just like a pipe thread, but straight instead of tapered.
Using a 1/4" NPT tap, you can convert easily to doing -AN fittings.
There are a few write-ups here and there for it. I know Speed Density did one awhile back that I pretty much followed to the T. I think the shopping list is as follows, but you can do it your own way also:
(2) 1/4" NPT to -6 AN (Male-Male)
(2) -6AN to push-lok 90* elbow (Female-Male)
(3) Push-lok to -6 AN straight (Male-Female)
(1) -6 AN "Tee" (All male)
~6-8 feet of -6 push-lok hose
Aeroquip makes the push-lok stuff, and summit has their own brand of it as well. You push the hose right on and forget about it. No clamps needed.
I had to re-do a section of mine (not long enough) and all I had to do was cut it at the fitting with a razor knife, then pull it off with pliers (and used a heat gun to make it a bit easier).
Yes, it's a 1/4" NPSF thread. Just like a pipe thread, but straight instead of tapered.
Using a 1/4" NPT tap, you can convert easily to doing -AN fittings.
There are a few write-ups here and there for it. I know Speed Density did one awhile back that I pretty much followed to the T. I think the shopping list is as follows, but you can do it your own way also:
(2) 1/4" NPT to -6 AN (Male-Male)
(2) -6AN to push-lok 90* elbow (Female-Male)
(3) Push-lok to -6 AN straight (Male-Female)
(1) -6 AN "Tee" (All male)
~6-8 feet of -6 push-lok hose
Aeroquip makes the push-lok stuff, and summit has their own brand of it as well. You push the hose right on and forget about it. No clamps needed.
I had to re-do a section of mine (not long enough) and all I had to do was cut it at the fitting with a razor knife, then pull it off with pliers (and used a heat gun to make it a bit easier).
02-02-2011, 09:27 PM
#19
(NPSF= National Pipe Straight Fuel)
I'm thinking that you should be able to thread into the heads 1/4 inch NPT fittings (National Pipe Thread which is tapered) and get it to tighten and seal without running a 1/4 inch pipe tap through it first. I believe the tapped threads in the head are allready the finished tap size without the taper. Treat it like a pipe fitting and apply some teflon tape.
Before running that pipe tap through the threads, first try the 1/4 inch tapered plumbing fitting.
I'm thinking that you should be able to thread into the heads 1/4 inch NPT fittings (National Pipe Thread which is tapered) and get it to tighten and seal without running a 1/4 inch pipe tap through it first. I believe the tapped threads in the head are allready the finished tap size without the taper. Treat it like a pipe fitting and apply some teflon tape.
Before running that pipe tap through the threads, first try the 1/4 inch tapered plumbing fitting.