Re: Morticus

Posted by kevinpackard On 2023/7/19 0:47:58

Now to business.

The guy the car was bought from had the car running but it was rough. We could tell it was missing on at least one cylinder, and I was assuming sticking valves. Unbeknownst to us he was us indeed running the car on the gas that was in the tank, and apparently it was old. The next day at my place I couldn't get the car started to get it off the trailer, so we pushed it off and into the shop.

Here's what we've done so far:
1.) Drained old fuel. There were about 8 gallons of nasty gas in the tank. It smelled sweet like fruit and was red in color (could be from rust in the tank).
2.) Drained from the fuel pump to the carb
3.) Replaced old and cracking rubber fuel line from hard line to fuel pump
4.) Replaced spark plugs
5.) Replaced spark plug wires
6.) Replaced points and condenser
7.) Reset timing

Next on the list to do:
1.) Replace cap and rotor (on order)
2.) Replace all wheel cylinders (on order)
3.) Replace all rubber brake lines (on order)
4.) Clean out rear junction block and axle breather on rear axle
5.) Bleed brakes thoroughly. Potentially replace brake lines.
6.) Drain/replace coolant, new coolant hoses, new radiator cap
7.) Drain oil and replace filter

Here's where we are at with the engine. Initially only 3 cylinders were giving us numbers on compression. The intake valves on #1 and 4 are sticking. I removed all the spark plugs and put MMO down on the holes and let it work for a few days. It turned the engine by hand over the course of several days, while spraying the valves with Freeze Off, PB Blaster, MMO and anything else I could get my hands on. The MMO allowed me to pick up more cylinders. Currently we stand here:
1 - 0
2 - 142
3 - 135
4 - 0
5 - 130
6 - 135
7 - 132
8 - 0

The valves on 8 seem to move as expected, so I'm thinking stuck rings? I have more MMO in the cylinder trying to clean things up.

#4 intake valve is moving better, but still slow. At least it is moving now. #1 intake valve is much more sticky. It does move down on it's own, but it's over the course of an hour. So there is some heavy corrosion or varnish in there preventing it from moving smoothly. That is the one valve that I'm worried about...hoping it's not bent.

My thought is let the MMO work for another day or so, turn the engine by hand, and maybe crank it a few times with the starter (no spark) to see what I get. Then hook everything back up, get the engine started, run it up to temp, shut it down and let it heat soak. I'm hoping a few cycles of this will allow the heat to expand the metal and get the valves moving. This worked on my Panama when I had a stuck valve.

-Kevin

Attach file:

---

  Old gas.jpg (175.99 KB)


  Stuck intake valve number 1.jpg (204.08 KB)