258-6 mechanical water temp
Jetsetr
Jeeper
1981 AMC 258 i6 / 4.2l 6 looking for the best place in the block/head to place a mechanical water temp sending unit...don’t see anything obvious...
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258-6 mechanical water temp
- Thread starter Jetsetr
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Belizean
Always Off-Roading Jeeper
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How about in the water jacket of the intank manifold ?
caveman
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Near the back of the head on the drivers side on top. There should be a port for it.
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When I did this on the 454 in my truck I used the drain plug on the side of the block. Was the right size and has worked great.
Jetsetr
Jeeper
Bypassed the water in the intake...port on the back of the head is much too small for a mechanical temp gauge.
Unfortunately haven’t found any plugs or ports big enough for the temp sending unit bulb.
Unfortunately haven’t found any plugs or ports big enough for the temp sending unit bulb.
caveman
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My engine has a port on the water neck. It was too small for a temp probe so I redrilled and tapped it to fit. I also had to put a fitting there to set it out a little because the probe was a little too long and hit on the end. I believe the neck came from a 93 Grand cherokee.
Just did mine on a 80 CJ7 , AMC 258 i6 / 4.2l . I used the port on the front of the block. Be fore warned that plug is hard to get out. I ended up drilling and tapping.Used a magnet to get the shavings out.
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Autometer also makes a coupler for the top radiator hose with a fitting for the probe. Also there is a thermostat housing from later jeeps that has a port. Not sure of the year.
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Jetsetr
Jeeper
Sounds like the best option, where on the front of the engine is it? Haven’t really looked up there for any plugs/ports.
Thanks
Picture of mechanical guage probe. The 1/2 inch plug is hard to get out. After trying heat, an assortment of easy outs and several other methods I drilled it for a 3/8 inch pipe fitting and tapped with 3/8 inch pipe tap. I basically taped the inside walls of the 1/2 inch plug. I then ordered a Autometer 2263 temperature sensor adapter . It cost about $10 on Amazon. Installed it with a little pipe dope and the probe screwed right in and doesn't leak..
I ran my probe lead down and along the frame.
But if you can get the 1/2 inch plug out you wouldn't need all the drilling, tapping, CUSSING or adapter. Most guages coming with a 1/2 inch fitting that screws right in.
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I ran my probe lead down and along the frame.
But if you can get the 1/2 inch plug out you wouldn't need all the drilling, tapping, CUSSING or adapter. Most guages coming with a 1/2 inch fitting that screws right in.
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That's the drain plug I was talking about.