I think need to install another gauge and need to search the sensor location.
Would you give me your thoughts on this situation?
Do you think mine is the correct thermostat(Robartshaw) and the thermostat is working?
I had been performing Nissan Skyline maintenance until now but never done american classic, so I’m just full of questions.
Temp sensor location is on front of engine block behind where heater hose connects to water pump. It has a single red wire connected to it in the picture. That is the area you need to measure sensor temp on your infrared thermometer.
Next step for me would be to pull out and check/test your thermostat. It’s easily done by removing two bolts from the thermostat housing where upper radiator hose connects to engine block.
Based on your low temp drop across your radiator (16 instead of 30 degrees), you don’t have enough coolant flow through radiator, and wrong thermostat is a likely cause of that. Could also be a bad water pump impeller or clogged coolant passages in engine, but thermostat is easiest thing to fix.
Maybe a Royce question…did ford make a larger waterpump pulley or a smaller crank pulley for low speed applications like a pick up or commercial chassis. I know mopar did for years
It was informative, I appreciate your support and giving your thoughts.
There isn’t a shop in Japan that has Robartshaw thermostat, so once I will be well-prepared get to this work.
Even if it’s surplus, having the correct components isn’t bad.
I’m so grateful to you for always helping me.
Glad to help! When I first got my Cougar, it would get so hot the fuel line would vapor lock and I had to be towed home. So I do not like to see a high temp gauge either.
Mine had the same radiator as yours with only 2 cores, same fan, plugged coolant passages in block, water pump impeller partially rusted off, and bad thermostat. Back then, my temp gauge ran at 3/4, top radiator hose measured 220, and bottom 200. After fixing them all, I still had the same problem until I put the correct thermostat in. That is what made the most difference for me.
When they replace your thermostat, check to make sure the brass restrictor plate with hole in the middle is still in the block under the thermostat.
Thank you for sharing your experience.
It gets knowledge helps and supports my life with Cougar.
Probably Cougar will sleep during the summer because the summer in Japan is too hot and humid.(The temperature is over 100℉ in Aug. and Sep.)
By can not driving a Cougar I will be a wreck during the summer…
I got that installing the correct restrictor plate is important, too and found out that it is sold in WCCC!
Hmm… there are many components I have to purchase, my wife will awfully beat me tonight.
A man has the moment must be beaten.
Very similar to the summers here in Kansas City. I was like you - afraid to drive it in heat. But the good news is my Cougar now handles 100 degrees without problems anymore. The bad news is our unhappy wives from all the parts we order!
My wife sees how much I enjoy working on and driving my Cougar. It’s one of my hobbies and I get little grief over how much I spend on it. It, and my Ducati, are my therapy!
What an unhappy destiny😂
It seems that my Cougar also has possibility to run around in the summer!
Now I would like to put an aftermarket water temp gauge in has digital numeric, and looking for second coolant temp location for aftermarket gauge.
Does 351c have a port for that?
I’ve looked on the internet and can’t find it comparing the photo to mine.
My 351c was rebuilt by a content of M-code 2v.
Is this location for coolant sensor
No, that is an intake manifold bolt. But you could put a second coolant temp sensor where your unused temp controlled vacuum switch is on the water pump.
You’re very happy to be loved so much!!
I am a happy husband,too because I feel happy when my wife beat me😂
Thank you for the information.
It’s super good news for me who would like to put in without modificating the upper hose.
That screw hole is 1/4thread?
1/2"-14 thread
I hate to say this but a different gauge is not going to make it better. Imho , hooking up the vacuum high temp switch would be a much better use of that coolant port. If you must do a different gauge , most replacement thermostat covers have a second port in them
Thay are making them with a port for a 351C now?
Yes, I agree. Adding another gauge doesn’t solve any problems. Better to spend efforts getting
the cooling system working as intended before altering things. Start with the thermostat.
Thank you so much for always helping me.
The contents of working I have to do became clear.
When you order your thermostat, washer and gasket from wccc, get your wife to buy a ford fartory shop manual for your year along with a body and electrical assembly suppliments for your year car , Im doubting that there are many cougar mechanics in japan with late 60 experience.
If you must install an aftermarket temp gauge , a ele trical 2in mught go in the ash tray . Closing the tray akes it go away .
I find it difficult to understand your reluctance tohook uo the vacuum thermoswitch you already own . 6 or 8 ft of 5/32 (4mm) rubber or silicone vacuum hose is all you need . When the temp gets
too warm , manifold vacuum will advance the timming , which increases the idle speed , which increases the fan/water pump speed . Even at
a dollar a foot , its les than a pack of smokes and might just solve your issues. Dont forget to put check timmig on your list
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It’s not that I’m reluctant to use the Vacuum thermoswitch, that just unknowledge.
I explain again.
Cougar is my first car as American classic, cars I’ve been had and maintenanced are only Japanese ignition.
The shop where I purchased that Cougar is the best Mustang sales in Japan and my 351c was rebuilt with in US a few years ago, so I thought that it’s mean that a car Pertronix ignitor is installed don’t need the Vacuum switch.
I do not understand all of Cougar, I am still a baby who needs a diaper.
Thank you for your advice!
To make it simple, the Pertronix only replaced the points which cause the primary field to collapse on the secondary and create the spark itself. However, all of the mechanical advance and the vacuum advance and retard systems need to be maintained in order for the engine to perform properly
