Re: Re: Re: Re: SETTING THE VALVES

Posted by jdemaris on May 13, 2004 at 05:05:44 from (209.23.29.64):

In Reply to: Re: Re: Re: SETTING THE VALVES posted by rustyfarmall on May 12, 2004 at 21:37:59:

I don't know about the condition of the guy's springs but it doesn't matter. If a proper valve job was done it would take very little pressure for the valve to seal. Weak springs would have an effect at higher RPMs, but not at cranking. They'd have to be broken to cause the valve to hiss through a port at cranking speed. If the seats were ground deeper, and the valves refaced and therefore thinner, the springs should have been to shimmed to get back to proper installed spring-height - but still - that's not going to make them leak at cranking speed. If they are leaking, sounds like someone did a botch-job. That's one of the reasons I like using valve-lapping compound. I don't use it seal the valve and seat, I use it as a marking compound. It shows if good contact is being made or not, how wide the seat is, how much valve margin exists, etc. Also - one suggestion. Anytime we'd get a head back from a shop (instead of doing it ourselves) we fill the ports with kerosene and stand the head on its side - and then wait and see it the kerosene would leak through the valves. It's a good quick test to see if someone did a bad screw-up.

Follow Ups:

• Re: Re: Re: Re: Re: SETTING THE VALVES rustyfarmall 05:20:07 05/13/04 (1)
  • Re: Re: Re: Re: Re: Re: SETTING THE VALVES jdemaris 10:57:39 05/13/04 (0)

Post a Followup Name: E-Mail: Subject: Re: Re: Re: Re: Re: SETTING THE VALVES Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]