Contagion?

[TOM4CWB]

I'd NEVER take a recon'd head from cat...

When I rebuild my BXS c15 i sent my head into "action parts" in medicine hat and it had roughly 10K hours on it. Exact words from the shop foreman were: "are your air filters intact? Because this is the worst head I've ever seen in 35 years!" Valve guides, and stems looked like they had 40K hours on them. I'm guessing they had 30K on them when they "re-man'd" it and they were close enough to "in-spec" that they called it good. Head was warped, and wore out, but it wasn't cracked, so we planed it down and completely rebuilt it. When trying to roll the engine over for a top end set now, it's so tight you can hardly get it to roll over whichever piston is on the compression stroke!

Make sure to check your liner protrusion! Ideally you want those baby's to be within .001" of each other and certainly on the "high" side of spec. Also make darned sure your deck height is within .002-.003" or it should be pulled as well. This is the least likely, but if the deck is warped you're never going to get where you want to. I know it seems anal to talk in 2 or 3 thousandths, but trust me, it matters!

If deck is true, head is true, and liner protrusion is set, that thing will last for years!

On the cam, when you pull it so long as any scores aren't "draggy" when you pull your fingernail across it, they're good to go. Cam bearings are not hard, you just need a puller to drag them from front to back.

If you need anything PM me. I'm pretty sure 3406E's cross over on alot of fronts with my C15, and I can send you what I've got for manuals.

Cheers.

Thx! A good mechanic is important to rebuild the engine properly…(Jay) he said the same things about the liner protrusion and head being square as you have which is reassuring!

We will take the time and do it right.

Cheers