Re: Re: Re: Blue smoke

Posted by RAB on May 21, 2003 at 23:13:49 from (195.93.50.8):

In Reply to: Re: Re: Blue smoke posted by JG on May 21, 2003 at 18:27:47:

Hi,
Seals fitted or not, there is a seal on diesels.
If its not a fitted one then its the guide and valve stem themselves which make the seal (against gravity for an overhead valve engine). So maybe your guides are worn allowing a little oil to seep past. Although your mechanic friend is right about vacuum, the cause is the the differential pressure accross the valve stem - you may have slight positive crankcase pressure until the engine warms up and that would help oil bypass the valve stems. Btw there are an awful lot of old gas engines out there without valve stem seals as well, the valve stem seal being a relatively new invention. I use the word 'relatively' even though stem seals have been around for a long time!
Regards, RAB

Follow Ups:

Post A Followup Name: E-Mail: Subject: Re: Re: Re: Re: Blue smoke 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 ]