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I am tempted to go buy a new gauge and mount under dash somewhere because I do not know if my 442 is running on the hot side or not.
Cruising anywhere between 50-60mph stays around the location shown in the picture. If I stop at a red light or in traffic it tends to move to the right 1 more mark..3/4 mark. Once I start moving again it drops down to what is shown in the picture.
The Rally Pac was checked out by Bob's speedometer about 18mo ago. He only told me that the oil pressure would read slightly higher than actual.
Do you think this is ok? Oh yea..'67 400ci w/ TH400. Car does have a/c, but not in use.
Looks and sounds normal for summer temps. I would get a mechanical gauge and hook it up just to see what its actually running to be on the safe side. If your stock gauge is not pegged then its probably ok.
Thanks for the response Eric. I was pretty sure it was going to be ok, but I am still getting used to it since it is not an everyday driver. Thought I would ask anyway for reassurance.
Looks and sounds normal for summer temps. I would get a mechanical gauge and hook it up just to see what its actually running to be on the safe side. If your stock gauge is not pegged then its probably ok.
I don't drive the car often and still haven't purchased a mechanical gauge to confirm. By chance do you or maybe anyone else reading this post know the ~deg of each tic mark on the factory gauge?
Also, on the 400ci engine, do you now of another port I could connect the mechanical gauge to w/o having to remove the current sending unit? I am looking at one from Advance Auto.
I don't drive the car often and still haven't purchased a mechanical gauge to confirm. By chance do you or maybe anyone else reading this post know the ~deg of each tic mark on the factory gauge?
Off hand no, but your owners manual should state what they are. Based on your pic like I said earlier you should be fine.
Also, on the 400ci engine, do you now of another port I could connect the mechanical gauge to w/o having to remove the current sending unit? I am looking at one from Advance Auto.
If your using the stock manifold, no. What I would do is temporarily remove the factory sender and hook up the mechanical gauge and note temps for your piece of mind.
I think the water port in the intake manifold is much larger than the 1/8" threaded part of that fitting (intake may be 1/2" but not sure?), and the temp probe for the gauge looks to be about as long as the entire fitting length.
I think the water port in the intake manifold is much larger than the 1/8" threaded part of that fitting (intake may be 1/2' but not sure?), and the temp probe for the gauge looks to be about as long as the entire fitting length.
You would be correct... Senior moment Saturday on my part... Poor example, I was thinking temp fittings and typing oil pressure fittings for a search of fittings... I do think you would be able to plumb it from some standard fittings, although it may be a little bulky...
I believe correct thread is 1/2-14 NPT... Plenty of styles available to choose from:
Plumb in a tee fitting and run both gauges and temperature sending unit at the same time... This will give you a good comparison...
No, not with temp senders. You can use a tee fitting for pressure senders like oil pressure, but you cannot for temp senders. The temp sender must be in flowing coolant to get an accurate reading. The tee fitting is a "dead end" and will typically read low. If your intake does not have sufficient ports for multiple temp senders, you can drill and tap the coolant crossover next to the T-stat housing or you can buy an aftermarket adapter that splices into the upper radiator hose. The latter is not ideal (it won't be accurate when the T-stat is not open) but is still much better than the tee solution.
No, not with temp senders. The temp sender must be in flowing coolant to get an accurate reading.
Makes sense, I didn't think about the sensor being affected by the lack of flowing coolant... The adapter you showed is definitely a good means to get the multi temp readings due to lack of intake ports...
I bought one of these inline adapters and a temperature gauge from Amazon. Works very well. Here is the adapter as bought (for $12.95) and then installed in the upper radiator hose.
Last edited by jaunty75; Jul 17, 2017 at 07:04 PM.
Poor example, I was thinking temp fittings and typing oil pressure fittings for a search of fittings... I do think you would be able to plumb it from some standard fittings, although it may be a little bulky...
