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Engine Management, Fuel, Spark, EGTs, and Air/Fuel Ratios This forum includes general electrical, modification, tuning, repair, replacement, identification and restoration of all components mentioned above including SMEC, SBEC, Logic Modules, aftermarket engine management, etc. Nitrous oxide posts go in here. This is the place

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Old 06-30-2012, 04:22 PM   #1
size of oring from FPR to return line  
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90 daytona es 2.5 turbo

anyone know the exact dimensions and/or material for the little oring that goes on the fitting which screws into the fuel pressure regulator return port? it looks about 2mm thick and maybe 6mm diameter?

i have the chrysler p/n but apparently they are long ns1..

i would imagine this is a common oring to almost all fuel pressure regulators of this design regardless of make/model..right?

my oring is ancient and crushed

please help..oh please....
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Old 06-30-2012, 06:10 PM   #2
Re: size of oring from FPR to return line  
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should be the same as any of the injector O-ring;s

those ARE available in a kit for 2-4$ from any auto parts store
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Old 06-30-2012, 06:12 PM   #3
Re: size of oring from FPR to return line  
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should be the same as any of the injector O-ring;s

those ARE available in a kit for 2-4$ from any auto parts store
nah im not talking about the big orings on the injector or the part of the regulator that presses into the rail, i mean that little itty bitty oring on the fitting that screws into the regulator..

looks alot like the little oring on the fitting that screws into the power steering pump...
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Old 06-30-2012, 06:43 PM   #4
Re: size of oring from FPR to return line  
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sorry I misread..

I just looked at my collection of FPR and they all have hose nipples for the return line, not a threaded fitting..

must be a "later" 2.5 TI difference ?
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Old 06-30-2012, 06:57 PM   #5
Re: size of oring from FPR to return line  
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sorry I misread..

I just looked at my collection of FPR and they all have hose nipples for the return line, not a threaded fitting..

must be a "later" 2.5 TI difference ?
interesting..heres pics of my fuel rail..theres a short bent tube that connects to the return port of the fuel rail via a thread fiting with oring..the oring is in the pics on the end of the fitting but its so dirty it doesnt show up well




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Old 07-01-2012, 06:24 AM   #6
Re: size of oring from FPR to return line  
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Old 07-01-2012, 10:51 AM   #7
Re: size of oring from FPR to return line  
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aha,
on the earlier "1-piece" FPR's there is just a hose nipple in the place where those threads are;

altho one of my aftermarket (Standard) has a NPT fitting there with a NPT -> hose nipple brass adapter

ChryCo certainly added that bit of hard line to replace the failure and damage prone bit of rubber line that all earlier TD have %)

{breakage can lead to fire = not good}

otherwise the FPRs look identical,
and I would bet that an earlier unit would fit your fuel rail ...
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Old 07-01-2012, 11:07 AM   #8
Re: size of oring from FPR to return line  
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Hmm..those all look too big, and I wonder what material they are made of. Did you have good experiences with them?
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Old 07-01-2012, 11:08 AM   #9
Re: size of oring from FPR to return line  
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sorry I just looked at the "2-piece" intake mani and it has the same style FPR as you do,
as does an aftermarket TD FPR I have..

LOL which also has a crusty "O-ring"..
so I guess I'm looking for one too

edit - yes this is a Accufab brand
Attached Thumbnails
size of oring from FPR to return line-photo120.jpg  

Last edited by detobias; 07-02-2012 at 08:38 AM..
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Old 07-01-2012, 11:14 AM   #10
Re: size of oring from FPR to return line  
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sorry I just looked at the "2-piece" intake mani and it has the same style FPR as you do,
as does an aftermarket TD FPR I have..

LOL which also has a crusty "O-ring"..
so I guess I'm looking for one too

i think you and i have the exact same AFPR...

the fitting looks standardized..i think it is literally the same fitting used on the power steering pump. the oring size is probably an industry standard...we just need to find out what.

and since it fits a generic AFPR (ours are generic, right?) that means theres definitely gotta be more than a few people who know exactly what it is...probably at the place who makes the AFPR

the chryco part number, for a 90 daytona 2.5 turbo, for the record, is: 4418293

im itching to turn this into a mcmaster carr part number...
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Old 07-01-2012, 11:20 AM   #11
Re: size of oring from FPR to return line  
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just emailed accufab (makes our AFPR) tech support...ill post if/when they reply
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Old 07-02-2012, 06:47 AM   #12
Re: size of oring from FPR to return line  
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Old 07-03-2012, 05:54 AM   #13
Re: size of oring from FPR to return line  
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I tried a bunch of the standard AS568A- O-Rings for the same exact application, hoping that I could find a silicone one to work, they all would skive a piece off. Finally I tried a metric Viton (great for petroleum based fluids) 1mm x 5mm ID, McMaster #9263K285, so far so good. If your ordering from McMaster do yourself a favor and get some Parker "Super Lube" #9463K33. It is the best O-ring lube period! One tube should last a lifetime and you will be amazed how easy parts go together without damaging the O-ring.
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Old 07-07-2012, 08:54 PM   #14
Re: size of oring from FPR to return line  
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alright heres what ive found:

accufab apparently has no idea what oring goes on the fitting that their AFPR is designed to mate with. they seemed really REALLY eager to point out that "they didnt supply that fitting in their kit". gotta love some people ideas of customer service. and dont get me started on innovate motorsports customer service either. (total tangent....)

i did more searching online, and found someone on a grand national thread saying that you can get the oring from kragen/oreilly part number 27478. its about $4 and is usually stocked. i got it today and there are two orings. one is brown and too big, the other is black and looks like it will fit. ive got no idea what the materials are but ill give it a shot.

Oring for fuel pressure regulator | TurboBuick.Com
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Old 07-11-2012, 09:41 PM   #15
Re: size of oring from FPR to return line  
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did some poking around on rockauto ;
late T2.5 TI have a FPR that looks like the buick grand national which looks like the accufab

and as yu suggest there IS an o-ring listed separately, as "fuel rail o-ring kit"
theres a kit with 2 O-rings $2.50
STANDARD MOTOR PRODUCTS Part # SK18

also just a single O-ring is available
ACDELCO Part # 19258137 {#22516256}
SEAL,FUEL RTN PIPE (O RING) 6.07MM ID X 1.30MM THK
for $0.52 lol; with a LARGE interchange (All GM) so should be eZ to find... YAY

also list DORMAN Part # 55180
'fuel line repair' kit including 6" of steel line, threaded nut & o-ring $7
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