efosterw
08-05-2017, 02:29 PM
I replaced the old temp sending unit in my 96 XJ that goes to the gauge... the one at the back of the block. Now my gauge rises to about 250 within minutes of cranking the motor. Just shy of the red. I'm confident it's lying. I can still touch the valve cover and radiator cap without burning myself (too hot to linger very long, though). No steam, no boiling sounds, no weird odors. I really don't think the temp reading is true.
Two things that I think may be contributing:
1) I am struggling to get it seated all the way in and there are 3 or 4 rounds of threads still showing above the block. Is this causing a bad reading? My wrenches are too long to get good turns between the manifold and the firewall, so I've taken it as far as I can get it.
2) I had to file the hex down on the unit to make it fit. The one that came out was 1/2" but the ones all the parts houses carry are 9/16". I couldn't get the 9/16" to go down past the lip on the valve cover, so I filed it down to 1/2". Surely this wouldn't cause an issue?
Thanks in advance for any help.
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Two things that I think may be contributing:
1) I am struggling to get it seated all the way in and there are 3 or 4 rounds of threads still showing above the block. Is this causing a bad reading? My wrenches are too long to get good turns between the manifold and the firewall, so I've taken it as far as I can get it.
2) I had to file the hex down on the unit to make it fit. The one that came out was 1/2" but the ones all the parts houses carry are 9/16". I couldn't get the 9/16" to go down past the lip on the valve cover, so I filed it down to 1/2". Surely this wouldn't cause an issue?
Thanks in advance for any help.
Sent from my iPhone using Tapatalk