Scratch in cylinder

[pdq67]

I knew a pair of Brothers that bought an old 600 cfm portable A/C w/ an old flathead straight 6-banger Hercules or a Waukesha that all they did was install the lower end bearings, rings and grind the "cracked" valves and did a seat grind and the old SOB ran fine.

They used it to sandblast house trailer's down to bare metal so they could repaint them and then flip them to make a buck until the city got on them b/c of the dust and noise. Pre-EPA days here!!

pdq67

Ps., I saw the regound valve faces before installation and never said a word...............

[77wolf10.85]

Originally Posted by silver68

heres where it make contact. It was like that when I took out the old summit cam and put in the crane. The back of my gear looked good when romoved. I bought a cam button and the thrust bearing kit to hopefully prevent this next time. I am going to check the bottom of the cylinders and smooth out if necessary

yup, main oil gallery boss

If you're running a FT cam the button is a waste of effort. Won't hurt anything but it definitely won't prevent your deal. The back side of the gear has a thrust face that runs against a thrust face on the block right around the front of the #1 cam bearing(bottom of your pic). Limiting forward travel with a button does nothing to the rear side.......

An aftermarket gear is what did that.

You need to grind it down some, then check it against the new gear.

ok, 2nd reread saw thrust brg kit. nevermind.

[BigBlock73]

To me,it looks like someone "dimpled" the block around the plugs,with a chisel, to keep them from backing out.
Marks are to symmetrical

[z28rod]

To me,it looks like someone "dimpled" the block around the plugs,with a chisel, to keep them from backing out.
Marks are to symmetrical

thats normal, its the groves above the middle plug that they are talking about.