88 300-6 temp sender relocation
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Freshman User
Joined: Mar 2004
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88 300-6 temp sender relocation
i have and 88 f150 with a 300-6 that i recently purchased a set of aftermarket mechanical gauges for. when installing the temp. sending unit i found that the aftermarket unit was too long for the threaded hole in the block (it hits an obstruction inside the block). it's a sealed unit all the way back to the gauge so changing sending units was out of the question.
i made a "T" fitting from brass fittings from the local hardware store and installed both the factory electrical sending unit and the mechanical aftermarket one. now it seems i'm getting a very low temp. reading from both gauges even after i'm up to operating temp.
i put the original electrical unit back in the block and the reading on the factory gauge seemed alot more believable.
any suggestions on where to install the aftermaket sender directly in the block? i've heard of having a freeze plug threaded or drilling a hole in one and welding a nut of the appropriate size to it. bad idea?
thanks for your time.
i made a "T" fitting from brass fittings from the local hardware store and installed both the factory electrical sending unit and the mechanical aftermarket one. now it seems i'm getting a very low temp. reading from both gauges even after i'm up to operating temp.
i put the original electrical unit back in the block and the reading on the factory gauge seemed alot more believable.
any suggestions on where to install the aftermaket sender directly in the block? i've heard of having a freeze plug threaded or drilling a hole in one and welding a nut of the appropriate size to it. bad idea?
thanks for your time.
Junior User
Joined: Mar 2004
Posts: 93
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From: Las Vegas, NV
What kind of gauge are you using? Most reputable gauges will fit no problem. I'm using the cheap ones from Autozone, and they fit fine.
T-ing a temp gauge never works. The coolant doesn't flow through the T, so you'll have false readings.
To fix your problem, I would go with a different gauge.
T-ing a temp gauge never works. The coolant doesn't flow through the T, so you'll have false readings.
To fix your problem, I would go with a different gauge.
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Freshman User
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The gauges seem to be of good quality, I'm happy with the oil pressure gauge, it went in no problem. I'm still thinking about the freeze plug idea for the temp. sensor.
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Joined: Oct 2002
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From: The Big, Oregon
Napa has a large variety of adaptors, so you might be able to space the gauge out just 1/4-1/2", to keep it from touching. FWIW, I have mine in the water neck, but I had to space it out. It went in without bottoming, but I had no heat. Turns out it very nearly blocked the passage off.
