Fuel Sending unit replacement Question - JeepForum.com
 
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post #1 of 10 Old 06-29-2011, 08:29 AM Thread Starter
Jims-87YJ
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1987 YJ Wrangler 
 
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Fuel Sending unit replacement Question

Just picked up a new Fuel sending unit for my rebuild and have a question, when using the rubber gasket on the top should i seal it with something (RTV-?) or is just the rubber seal good enough?
Also is there any calibration that I should do before I assemble it?
Thanks for any info.


1987 YJ, 258, Weber 32/36, HEI, Custom Sound bar, Hardtop/Sun-rider/bikini tops, 2" Lift, 1/2" Boomerangs, 1" Body & MM Lift. 32x11.5x15 Copper STT's on Black Rock 950 Lobos w/4" backspacing, Still need Front Bumper and Seats.

My build thread: http://www.jeepforum.com/forum/f12/m...hread-1137667/
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post #2 of 10 Old 06-29-2011, 09:29 AM
oldtime_ironman
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I don't think its absolutely necessary, but it couldn't hurt either. I used a very thin coating of Permatex #2 (the black tar stuff). There isn't any calibration that I'm aware of, although I would check to be ery sure that the grounds are good.
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post #3 of 10 Old 06-29-2011, 01:57 PM
pasinbuy
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If you want to be able to go back in without buying a new gasket. Do not use RTV. It is a thick gasket.
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post #4 of 10 Old 06-29-2011, 02:17 PM
5.7YJ
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Gasket should be fine on it's own and there is no calibration needed.
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post #5 of 10 Old 06-29-2011, 02:30 PM
phil1330
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NO rtv. Rubber gasket is A OK by itself.

"Life is hard, it's harder if your're stupid"...The Duke
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post #6 of 10 Old 06-29-2011, 04:42 PM
gunshw301
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rtv is no good with fuel, even says it on the label.

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post #7 of 10 Old 06-29-2011, 07:28 PM
Noltz
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No silicone here. Make sure you add a sending unit access hole to the bed of your project.

-Noltz
'91 Frankenheep YJ. 4.0, 4" BDS, Richmond 8.8, Titan 12k, 35" KM2's, rust.
'88 YJ, 4.2/4.0 head, +4" & shackles, BFG 33's (sold)
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post #8 of 10 Old 06-29-2011, 07:33 PM Thread Starter
Jims-87YJ
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Thanks for all of the replies. Will install just the gasket, as I am replacing all of the hardware and sandblasting and painting everything, if I have to drop the tank down the road it should not be an issue. Thanks again, Jim

1987 YJ, 258, Weber 32/36, HEI, Custom Sound bar, Hardtop/Sun-rider/bikini tops, 2" Lift, 1/2" Boomerangs, 1" Body & MM Lift. 32x11.5x15 Copper STT's on Black Rock 950 Lobos w/4" backspacing, Still need Front Bumper and Seats.

My build thread: http://www.jeepforum.com/forum/f12/m...hread-1137667/
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post #9 of 10 Old 06-29-2011, 08:15 PM
jcmooreusmc
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Jim, glad to hear you're going with the gasket only. I'll give you an example of what that silicone or rtv will do. I had my fuel pump replaced at a shop by a licensed mechanic. Later on, I was having trouble with the jeep shutting off while driving for a good hour or more. After sitting for a few hours, it would crank and run again. Decided to drop the tank and check out the pump. The mechanic put a tremendous amount of silicone around the hole for the sending unit. Silicone + Gasoline = Jelly. The jelly would get sucked up around the screen and stop fuel flow. After sitting, it would fall off and drop back to the bottom of the tank. Had a good handful in there. I wound up replacing it with a Bosch and did the work myself.
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post #10 of 10 Old 06-29-2011, 08:54 PM Thread Starter
Jims-87YJ
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Wow That sounds like a mess, I will avoid the use of any additional sealant. Thanks again for all the replies

1987 YJ, 258, Weber 32/36, HEI, Custom Sound bar, Hardtop/Sun-rider/bikini tops, 2" Lift, 1/2" Boomerangs, 1" Body & MM Lift. 32x11.5x15 Copper STT's on Black Rock 950 Lobos w/4" backspacing, Still need Front Bumper and Seats.

My build thread: http://www.jeepforum.com/forum/f12/m...hread-1137667/
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