LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

banjo bolts

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Old 11-15-2015 | 06:59 PM
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94Z28LS1toLT1's Avatar
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banjo bolts

Got a issue after the mechanics shoved my distributor back in didn't set it right,I've been fixing all their mistakes,i never paid them told them they never finished the job.

The next issue I'm having is the banjo bolt on the passenger side head doesn't wanna go in,there were times I'm trying n trying n it wanted to go but a no go. I even swapped bolts same thing.Just keeps slipping out.

I took the line off n tried screwing it in then it went great in the head,im confused hoping i don't have to remove the heads again.

Is there a different bolt I can use or does it have to be that banjo bolt bcuz I noticed the holes in the banjo bolt assuming it's for coolant to circulate
Old 11-15-2015 | 07:37 PM
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Re: banjo bolts

I have seen people convert that line to AN Fittings.

It is a steam pipe so a regular bolt won't work.

If the bolts go in without the pipe attached, I am going to go out on a limb, and say, you aren't getting it lined up perfectly straight.

I know it's very tight space, maybe your line got bent a little. Take your time you will get it.
Old 11-15-2015 | 08:00 PM
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Re: banjo bolts

Originally Posted by Pullngz
I have seen people convert that line to AN Fittings.

It is a steam pipe so a regular bolt won't work.

If the bolts go in without the pipe attached, I am going to go out on a limb, and say, you aren't getting it lined up perfectly straight.

I know it's very tight space, maybe your line got bent a little. Take your time you will get it.
Haha that's what my wife said too about me putting it straight,thank u on reply back,? What did u mean by AN fittings
Old 11-16-2015 | 10:28 AM
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Re: banjo bolts

-AN fittings are typically used for braided S/S lines with fuel, nitrous, oil, etc.:

https://www.camaroz28.com/forums/lt1...cement-793480/

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While people seem to reference the threads in the heads as 1/4" NPT, Shoebox indicates:

"It's a special thread (1/4-18 NPSF) dryseal, straight pipe thread"

Last edited by Injuneer; 11-16-2015 at 10:34 AM.
Old 11-16-2015 | 01:36 PM
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Re: banjo bolts

Originally Posted by Injuneer
-AN fittings are typically used for braided S/S lines with fuel, nitrous, oil, etc.:

https://www.camaroz28.com/forums/lt1...cement-793480/



While people seem to reference the threads in the heads as 1/4" NPT, Shoebox indicates:

"It's a special thread (1/4-18 NPSF) dryseal, straight pipe thread"
Hey thank you so alot for that I'm gonna try to line up that banjo bolt tonight after i get off I work 1 to 9.so do I have to switch to that line if my thread in my head is messed up, bcuz are there chances my head is messed up.
Old 11-20-2015 | 09:43 AM
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Re: banjo bolts

NPSM. National Pipe Straight Mechanical. I think that's what they are.
Old 11-20-2015 | 10:51 AM
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Re: banjo bolts

Originally Posted by RUDEDOG
NPSM. National Pipe Straight Mechanical. I think that's what they are.
Don't think so.

The National Pipe Straight Mechnical (NPSM) female fitting has a straight thread and an inverted 30° seat.

The NPSF is a straight thread and uses the sealing washers to seal. The NPSM uses a chamfer for sealing.

The NPSF designation is right out of the parts book.
Old 11-21-2015 | 07:00 AM
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Re: banjo bolts

Originally Posted by Injuneer
"It's a special thread (1/4-18 NPSF) dryseal, straight pipe thread"
This is correct and is the reason the banjo bolts require a pair of washers to seal them. Also, a NPT threaded AN fitting will screw into the ports with a little effort and will seal just fine.
Old 11-21-2015 | 03:51 PM
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Re: banjo bolts

Originally Posted by 97WS6SCharged
This is correct and is the reason the banjo bolts require a pair of washers to seal them. Also, a NPT threaded AN fitting will screw into the ports with a little effort and will seal just fine.
I haven't worked on it but just in case I need to do the AN fittings can someone make me a list of what I'll need to do this set up.thank you
Old 11-21-2015 | 04:28 PM
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Re: banjo bolts

Originally Posted by 94Z28LS1toLT1
I haven't worked on it but just in case I need to do the AN fittings can someone make me a list of what I'll need to do this set up.thank you
Coolant Crossover AN Conversion, Part List and Pictures. - LS1TECH
Old 11-25-2015 | 08:51 PM
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Re: banjo bolts

Hey thank u I got it just outta curiosity do I have to get all those pieces from summit website or will a hardware store have that,or a high performance car store have it
Old 11-25-2015 | 10:47 PM
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Re: banjo bolts

You can get them from the vendor of your choice. Hardware store? Probably not.
Old 11-26-2015 | 12:08 AM
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Re: banjo bolts

Originally Posted by shoebox
You can get them from the vendor of your choice. Hardware store? Probably not.
Thank you cool they have a couple of performance car stores out in Vegas I should be able to find out who can supply them thanks again
Old 12-02-2015 | 09:14 PM
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Re: banjo bolts

Originally Posted by shoebox
You can get them from the vendor of your choice. Hardware store? Probably not.
THANK YOU Rob and Fred for the conversion pics I found all my things I needed for the AN fittings n just inserted the 1/4 npt fittings,now I used anti seize for the 1/4 npt fittings for the heads is that ok to use thank you
Old 12-03-2015 | 12:00 PM
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Re: banjo bolts

Glad it worked out, and you were able to find the parts locally. I gave up trying to find -AN fittings on the shelf here in central NJ.



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