- Joined
- Oct 31, 2016
- Messages
- 2,645
Yanked the Toyota 3TC out of the midget today and started to take it apart to see what I might need to do to it. I was surprised at how clean the inside of the engine was. I didn't find any crud anywhere. Did not find any scoring or even a ridge in the cylinders. But I did find one thing that needs replacement and a mystery that I have no explanation for. The cylinders all measured 3.368 with a stock cylinder at 3.346 to 3.348. Looks like the cylinders have been bored .020 over stock. The pistons all have .050 stamped on the top. I was expecting .050 over stock. I ran my cylinder DI around one cylinder and had a run out of .002. Checked one rod journal and it was spot on stock at 1.888. So this all looks good. Now for the not so good. The push rod for the #2 cylinder intake valve was off the rocker arm and stuck between the rocker and the support. The valve lifter end is pretty badly chewed up. I will look for a replacement.
Now for the mystery. The #1 & #2 intake valve lifters are chewed up and they were hitting the bottom of the cylinder head. We are not talking about a small nick. There is about a 1/8" gouge out of the cylinder head. I don't know how it is possible for the lifters to hit the bottom of the cylinder head. There is approximately 3/8" clearance between the lifter at the top of its stroke and the bottom of the cylinder head. Any ideas?
Now for the mystery. The #1 & #2 intake valve lifters are chewed up and they were hitting the bottom of the cylinder head. We are not talking about a small nick. There is about a 1/8" gouge out of the cylinder head. I don't know how it is possible for the lifters to hit the bottom of the cylinder head. There is approximately 3/8" clearance between the lifter at the top of its stroke and the bottom of the cylinder head. Any ideas?