[Clark]

Ok,
If you read my other post you know that I took apart my 350. The heads that came off the motor are sportsman II's with low mileage(less than 10'000). I did a leakdown check prior to pulling them off and all was well with the valves.

All in all they seem to be in great shape except for one thing. There is a bunch of carbon built up on the back side of the intake valves. I was hopeing to reuse then "as is" but the carbon bothers me.

Am I worrying about nothing? Should I disassemble them and get everything tanked? If I get them tanked, does that generate some machine work to reseat the valves.?

Also, I have what appears to be Teflon PC seals. How many times can you remove and replace a valve before you wear out the seal?

Thanks

Clark

 

[Randy Mosier]

This is easier than you think! Don't sweat it. Just use a piece of cardboard and punch 16 holes in and number them in pairs. When you pull the intake and exhaust valves for the number 1 cylinder, put them in holes labeled number 1. Do this for all eight sets of valves so you can put them back in the same guides they came out of.

The carbon is no problem either. Just wire brush them clean. (Wire brush wheel on a bench grinder that is, not a hand held brush.)

You'll want to look closely at the valve faces and the seats in the heads. Look for pitting and for signs of grooving around the face of the valves. Sometimes the hard seats will wear a groove around the valve face and if that's the case, it's time for a vavle job. Either the valve faces will need regrinding or they'll need to be replaced. That's when it's time to head to a shop.

But if they're not pitted or grooved and you're sure the guides are serviceable, clean them up, put them back in the holes they came out of, and reuse them as is. As for the seals, I'd go ahead and get new ones. They're not that expensive.

 

[Clark]

Randy

Thanks, thats what I wanted to hear.

I've already pulled a few and the valve faces and head seats look like new. No grooves or pits.

When I hit the valves with the wire wheel, how easy is it to screw up the face on the valve?

Clark

 

[Randy Mosier]

You'll be okay. The face is pretty hard compared to the steel wires. The biggest danger you face is from flying chunks of carbon and wire. Be sure to wear safety glasses.

 

[Clark]

Thanks Randy