grind and lap or just lap

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.

grind and lap or just lap

Postby dennnis79 » Wed Dec 01, 2004 8:30 am

Do I need to have the valve seats ground for a nos block or, can they just be lapped to the existing (or new) valves?
dennis
"Hey, I didn't get a harumpf outta that guy!"
User avatar
dennnis79
5+ Years
5+ Years
 
Posts: 119
Joined: Tue Nov 16, 2004 3:11 pm
Location: Il, Collinsville

Valves

Postby Eugene » Wed Dec 01, 2004 11:55 am

Just an opinion. I would purchase all new valves.

Lapping or grinding. This is a toss up. I would try lapping the valves first. It won't take very long to see if they match up.

I just finished overhauling a Kohler engine for a Cub Cadet. There are two auto dealers in town and a number of auto repair shops. The only valve grinding equipment in the area is at the local technical college.
Eugene
Team Cub Mentor
Team Cub Mentor
 
Posts: 12528
Joined: Fri Jul 02, 2004 9:52 pm
Location: Mo. Linn
Zip Code: 65051
Circle of Safety Award
Circle of Safety: Y

gring or lap

Postby mike mix » Wed Dec 01, 2004 6:42 pm

It's very easy to gring the valve seats and quite cheap. A company in Michigan called Neway mfg. makes valve seat cutting equipment at a very reasonable price compared to other equipment. I've used their seat cutters and they work great. For about $100 you can get everything you need to cut the valve seats. You can order directly from them you will need to know the valve head diameter & valve stem diameter and you will be ready to go.
Good Luck Mike
mike mix
10+ Years
10+ Years
 
Posts: 37
Joined: Thu Jan 29, 2004 6:10 pm
Location: waterford michigan

Postby John *.?-!.* cub owner » Wed Dec 01, 2004 6:53 pm

Dennis, since you have a NOS block I would use new valves and springs. Lap the valves by hand. Inspect them closely as you work them. If they match the illustrations in the manual there will be no need to grind.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19474
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.

Postby dennnis79 » Wed Dec 01, 2004 7:01 pm

I just got done measuring the old valves and they are too worn to be reused.

I was hoping I would not have to grind since I have a new block and will have new valves. I'll lap carefully and see what happens.

Thanks.
dennis
"Hey, I didn't get a harumpf outta that guy!"
User avatar
dennnis79
5+ Years
5+ Years
 
Posts: 119
Joined: Tue Nov 16, 2004 3:11 pm
Location: Il, Collinsville

Postby John *.?-!.* cub owner » Wed Dec 01, 2004 7:04 pm

My Pappy taught me a good trick when reinstalling the keepers. Put a little dab of grease on the valve stem. The keepers will stick to it and stay in place while you relaease the spring.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry
User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
 
Posts: 19474
Joined: Sun Feb 02, 2003 2:09 pm
Location: Mo, Potosi
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.


Return to Farmall Cub

Who is online

Users browsing this forum: Bezirk, Jim Becker, ricky racer, tnestell, tst and 6 guests