Leak around fuel gauge sending unit

[Toysx2]

What yr 40 do you have?

OEM Fuel Tank Sending Unit for '66 to '72 Land Cruiser FJ40 FJ45

OEM fuel tank sending unit for '66 to 9/'72 Land Cruiser 40 Series. Compatible with F engine. Gasket and screws are available separately. Technical note: This sender isn't "resistive". It works like an oil pressure sender, with a bimetal points type regulator it it. The float moves the contacts...

www.cityracerllc.com

My 40 began life in 1968. We had a SBC 350 conversion done on it in the early to mid 1970s. It was probably in the 1990s that I switched from the stock toyota gauges to Stewart Warner ones. At that time it was necessary to switch out the fuel sending unit. The truck sat unused from 2010 until recently. As part of the process of bringing the vehicle back to life, I found it necessary to replace the sending unit. This is the one that I am having difficulty getting it to seal......

 

[Toysx2]

do the stud/screws rotate/turn? or are they captured where they will not turn?

Those are screws that are used to pull the sending unit down against the adapter. They turn until the nuts and lockwashers bite. At that point the rotation stop.

 

[peesalot]

Can you fit/make new holes in new sender to ditch the adapter and match the JIS pattern ? Clean both surfaces, assemble dry with good rubber gasket, snug it up gently and evenly, if it persists to seep I would then try the sealant mentioned previously. If the metal of the new sender is thin and wants to distort as it compresses the rubber gasket I would make a ring as opposed to adding washers if that makes sense, although adding flat washers may work fine if it is distorting.

 

[3_puppies]

X2 wondering about making the aftermarket sender fit the stock pattern

 

[Toysx2]

X2 wondering about making the aftermarket sender fit the stock pattern

Apparently, there are reports where guys have "wallowed out" the holes in the sender to fit the stock pattern. I will check how much of that needs to be done to make things work.....

 

[Slapshot]

Apparently, there are reports where guys have "wallowed out" the holes in the sender to fit the stock pattern. I will check how much of that needs to be done to make things work.....

I’m one of those guys. Check out my post here-

Post in thread '‘73 FJ40 followed me home. Now updated! 2/11/25'

Mar 2, 2021

So my lack of a working gas gauge was keeping me up at night. The stock sender I installed in the replacement tank doesn’t talk to my aftermarket gas gauge. I had 2 options, get a gauge that speaks Toyota or get a new sender that speaks aftermarket.

A new gauge that can be calibrated to whatever you have was around $200 and would be a gamble as to if it would ever work right.

A universal sender was $40 and at least I would be sure my gauge could read it. So I bought the sender. Autometer 3262 33ohms full/240 empty( THIS WILL NOT WORK WITH FACTORY GAUGES!). The specs say 5 bolt standard...

• Slapshot

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I’d take off that adapter and just mount to the tank