Re: freshly rebuilt a engine blowby under heavy lo

Posted by Allan on November 03, 2003 at 03:26:32 from (148.63.132.164):

In Reply to: freshly rebuilt a engine blowby under heavy load posted by Jonathan Mirgon on November 02, 2003 at 19:37:23:

Jonathan,

All engines have to breathe and a certain amount of �slight� smoke out of the draft tube is completely normal; the harder that they are pulling, the more the blow-by pressures.

All blow-by pressures originate at the combustion chamber and proper clearances control that pressure. Here are some things to think about:

When you say, "freshly rebuilt", did you replace the sleeves or re-bore (depending on engine) or did you just re-ring it? Replacing just the rings is a stop-gap/band-aid repair at best. A new ring against a bell-mouthed or wavy bore will never seat.

Were the rings correctly installed in regards to stagger and correct top/bottom orientation? Were the expanders and scrapers installed correctly? Were the ring gaps cleaned and were the depths correct? Ring-to-land clearances are critical when re using old pistons.

Were the valve guide to valve clearances correct as well as the installation of their respective seals?

Lastly, is the ventilation system inlet plugged?

Just some ideas,

Allan

Follow Ups:

Post A Followup Name: E-Mail: Subject: Re: Re: freshly rebuilt a engine blowby under heavy lo 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 ]