I spent about an hour working on the truck and I’m finished with the front engine mounts. This means I’m about one third, counting the time to clean the tools, finished with the job. I discovered that I do not have the correct rear engine mount, so I will need to talk with the parts supplier to get the correct one. There were early and late versions of the FC-170 and *sometimes* it makes a difference as to what part is needed. My truck was among the first 1,000 trucks to come off of the assembly line…so it’s an early version.
The concept is easy. Remove the two nuts that hold the front engine mounts to the engine, remove the four bolts and nuts that hold the engine mounts to the truck frame, jack up the engine with a floor jack (the same kind that is used to lift a car to change a tire), slide out the old engine mounts, slide in the new ones, lower the engine and replace the nuts and bolts.
Lifting the engine moves both the cooling fan and the generator and, unfortunately, these were hitting things before the engine was lifted up high enough to replace the engine mounts. So, I had to remove the generator and cooling fan before continuing. The area around the fan is quite congested and the nearby edges are sharp, so my arms are scratched up. I am getting a yearly medical checkup this week and I’m sure the doctor will ask me about my arms. 🙂
All of that is done and back together….except for the fan…..I decided to let my arm recover before reinstalling that.
The problem I’m encountering is grime around the rear engine mount bolts.
When working on unrestored old cars, it’s quite normal to encounter grime so thick that it makes it difficult to find nuts and bolt heads. I have a collection of tools for removing the grime and normally they work quite well.
Not this time.
This time the grime is as hard as stone. I have not encountered this before and my grime tools aren’t working.
There were around 30,000 of these trucks made and very few remain, so some parts, like transmission cases, are difficult to source. This means I need to be careful. I could use a small hammer and chisel to remove the grime but I don’t think it is “careful” to do that until I’ve tried other less physical methods of softening the grime.
Penetrating oil is a thin oil designed to creep into even the tightest spaces. It is normally used on the threads of rusty nuts and bolts to make it less difficult (note I didn’t say easy) to remove them. I have often used it for this purpose, but never before on hardened grime.
I’ll see how the penetrating oil works on the stone like grime. If it doesn’t work, then I’ll try “something else”. A hammer and chisel is still far down the list of things to try