MD69Boss
Suspected Troll
I have been getting the Boss back in order pretty much since May with the headlamp wiring harness fire, replacing the intake manifold, replacing the starter with a mini-Torq and am happy with the progress, save for the temp reading I am getting on my Auto-meter guage.
When I replace the intake manifold, the old temp sending unit was a very slim unit fitted into a brass sleeve that was screwed flush into the front of the manifold in the hole for the temp sending unit.
Upon replacing the manifold, I installed, what I thought was the right temp unit that I got from my local NAPA auto parts.
However, upon starting the boss, within three to five minutes the temp guage, (Auto-Meter gauge that worked perfectly before), would rise slowly from 100 degrees to fully pegged hot.
I was/ am able to pull the radiator cap and can put my hand on the manifold, so I am confident that the temperature reading is inaccurate.
Subsequently, I have regrounded both the block and the harness ground just beneath the voltage regulator. As my other gauges are working fine, I am not convinced this is a grounding issue.
I have also, decoupled and reconnected the headlamp harness beneath the dash at the firewall.
I have removed the radiator, and had it pressure tested at a reputable shop. Interestingly enough, I had to scrap the NPD cap I had as it failed the pressure test. (POS!)
I went to Autozone and installed a second temp sending unit specific to a 69 small block Ford, I was told.
With the new unit, ($8.99), the temp gauge reads on start up 150 degrees, and creeps to almost pegged, but not quite over the course of 5-8 minutes. I must honestly say, I am not convinced this is the correct unit either, having since paged through the NPD catalog....
For 1969, they list one unit, and for 1970, they list four different units, two for with a temp light and two for with a temp gauge...
I am also considering a new gauge, but want to ensure that I have the correct temp sending unit as I am tired of buying anti freeze! :cens
I used a lighter coating of sealant on the threads to rule out the sending unit is not grounded.
Is it possible I need to replace the gauge?
I am picking up an infared temp reading gun tomorrow, I think, but I am quite certain the motor isn't running hot.
Any thoughts welcomed...
By the way, the Boss is running fantastic!
When I replace the intake manifold, the old temp sending unit was a very slim unit fitted into a brass sleeve that was screwed flush into the front of the manifold in the hole for the temp sending unit.
Upon replacing the manifold, I installed, what I thought was the right temp unit that I got from my local NAPA auto parts.
However, upon starting the boss, within three to five minutes the temp guage, (Auto-Meter gauge that worked perfectly before), would rise slowly from 100 degrees to fully pegged hot.
I was/ am able to pull the radiator cap and can put my hand on the manifold, so I am confident that the temperature reading is inaccurate.
Subsequently, I have regrounded both the block and the harness ground just beneath the voltage regulator. As my other gauges are working fine, I am not convinced this is a grounding issue.
I have also, decoupled and reconnected the headlamp harness beneath the dash at the firewall.
I have removed the radiator, and had it pressure tested at a reputable shop. Interestingly enough, I had to scrap the NPD cap I had as it failed the pressure test. (POS!)
I went to Autozone and installed a second temp sending unit specific to a 69 small block Ford, I was told.
With the new unit, ($8.99), the temp gauge reads on start up 150 degrees, and creeps to almost pegged, but not quite over the course of 5-8 minutes. I must honestly say, I am not convinced this is the correct unit either, having since paged through the NPD catalog....
For 1969, they list one unit, and for 1970, they list four different units, two for with a temp light and two for with a temp gauge...
I am also considering a new gauge, but want to ensure that I have the correct temp sending unit as I am tired of buying anti freeze! :cens
I used a lighter coating of sealant on the threads to rule out the sending unit is not grounded.
Is it possible I need to replace the gauge?
I am picking up an infared temp reading gun tomorrow, I think, but I am quite certain the motor isn't running hot.
Any thoughts welcomed...
By the way, the Boss is running fantastic!
