Sunday, 24 April 2022

The Best Laid Plans...

After my attempt to start the old Jeep, and my discovery that there was coolant coming out the oil pressure port, I started sourcing a new head gasket.

Everything arrived over the past week, and I found a local source (NAPA) for copper head gasket spray.

Knowing that it's supposed to be pretty easy to swap out a head gasket on these Go-Devils, I dove in. Surprisingly, it went smooth through removing accessories and head nuts/studs (some studs came out, as expected). 

It was when I went to pull the head that I ran into troubles. It simply didn't want to move at all. Queue three hours of prying, hammering, heating, and using copious amounts of PB Blaster. Still no go, but there is movement now. The head is stuck to one stud that refuses to release it's grip. 
After exhausting my arms (they feel like wet noodles now), I decided to call it a day. I got the head nice and hot around the stud, and tried to get as much PB Blaster down the stud to try and get it to release. I'll spend the week heating, spraying, prying. I'm sure I'll win, eventually. 

Sunday, 10 April 2022

Make sure it's in neutral

I had a few minutes out in the garage this weekend. My son was hanging around with me on Saturday, and he enjoys playing in the Jeep. Anyone with a kid will understand that keeping them occupied is the secret to getting things done. 

The agenda item was pulling the fuel pump and replacing it with a new unit to see if I can fix my fuel issues that I encountered during my attempt to start the Jeep

Yeah. Not good.

It's easy enough to swap a fuel pump the Go-Devil, pull the hoses, two bolts, and off it comes. Well, off it came, missing half of the pump arm. I can only assume that the arm is somewhere in the oil pan. Sigh. regardless, I setup the new pump and test fit it, but did not install it. I wanted to check the cam to make sure the lobe for the pump was still good. I popped my starter battery on the charger (I really need to buy a real battery) and called it a day. 

So Pretty.
Fast forward to Sunday. The battery is charged up, I have a few more minutes to myself, so I get ready to bump the starter and watch the cam turn through the fuel pump port. I pull the starter trigger and the Jeep lurches forward. Fortunately I have wheel chocks in the front and rear, so no damage was done, and it was in 1st not reverse, so my foot was spared. Also, no fuel, and the ignition was off. 
Evidently Nate decided that while playing army man, it would be wise to play with the gear shift and ended up leaving in gear. I didn't think to check. Totally my fault, and not a mistake I'll make again. 

So there you go, some freebie advice for the day, always make sure it's in neutral before bumping the starter. 

Sunday, 13 March 2022

Test firing the m38 Go-Devil engine

Why was it 2022 before I learned about how
great these are?
Today was the day, the Jeep m38 was finally at a point where I was ready to try and start it up. I have spent the past few (cold) winter months slowly rebuilding the carburetor as I had time. This weekend we shipped my son off to his Grandparents, allowing me much more time in the garage. I fired up the propane and electric heat, plus the overhead halogen lights, and got to work. 

I started by finishing off the carb build, and plumbing in enough fuel line to get a small tank hooked up to the pump, through a filter, and into the carb. Sadly, the pump seems to be shot, but I have a new in box one to go in. 

The carb took a bit of work, being 70 years old and all. The metering valve and needle did not want to come out. It involved a lot more drilling than a carb rebuild should require. 

Some wires were run to hook up the starter with a trigger start and a makeshift switch to the distributor. 

10 Gauge wire is recommended for all wiring except for the battery to starter, that should be 1 gauge. I went a little overboard (See my battery cables here: The Jeep Garage: Slow and steady Jeep m38 Progress)

I put a bit of two stroke fuel into the carb, and used some starting fluid to get it to pop off once. It was enough to convince me that we have a viable engine. It needs some work to button it up, and probably a head gasket (coolant in the oil), but it turns over, has spark, and enough compression to pop. 

And without further ado, a VERY short video of me pulling the trigger... so to speak.