Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Antique Engine Community > Antique Gas Engine Discussion > Antique Engine Archives
Forgot Password? Join Us!

Notices

Antique Engine Archives All archived posts from 1999 to 2004 when SmokStak was on EnginAds. This is a read-only board.

Antique Engine Archives

What to do about blowby?


this thread has 13 replies and has been viewed 32769 times

 
 
Thread Tools Display Modes
  #11  
Old 12-30-2004, 08:36:25 PM
Ken Majeski's Avatar
Ken Majeski Ken Majeski is offline
Subscriber
 
Join Date: Oct 2004
Location: South Lawton, Wisconsin
Posts: 2,768
Thanks: 1,543
Thanked 2,329 Times in 811 Posts
Images: 44
Default Re: What to do about blowby?

Quote:
Originally Posted by Mac Leod
I still see no reason for the rings to seat so well and then have blowby a short while later other than the ring gap lineing up...seems to have compression when I turn it over backwards, very little blowby

Mac Leod
Well.... I can't see the rings traveling that much that fast. Also if the rings aren't pinned and you reused them you are fighting an uphill battle as they were worn to the cylinder and now they are probably in a different place. I would suspect you are washing the oil off the piston/rings either when starting or by feeding too much fuel. Try feeding more oil and see if that helps. The engine on my saw rig will lose compression ( Has lots Miles on it) if I don't feed enough oil but with enough oil feed it runs Just Fine.... This engine don't just sit there and Put.... It gets worked Hard about 20 to 30 hrs a year.. Yup, one of these days I will have to clean up the ring grooves and get some new rings...
__________________
Ken Majeski, Ellsworth Wis.

Last edited by Ken Majeski; 12-31-2004 at 11:58:15 AM. Reason: typo
Sponsored Links
  #12  
Old 12-30-2004, 09:54:19 PM
BWegher BWegher is offline
Registered-III
 
Join Date: Nov 2004
Location: McCook, Nebraska USA
Posts: 532
Thanks: 0
Thanked 33 Times in 30 Posts
Default Re: What to do about blowby?

Running at idle or very low RPM ?? This can cause rings to unsettle. Possible carbon interfering, also.
Try running at highest speed allowed for a while. Put at least some load on, and vary it while running high RPM. After a while of that, vary speeds up and down with load. then back to highest RPM.
  #13  
Old 12-31-2004, 01:22:22 AM
BobRR BobRR is offline
Registered-III
 
Join Date: Oct 2004
Location: Ypsilanti, Michigan, USA
Posts: 3,313
Thanks: 8,491
Thanked 1,394 Times in 947 Posts
Default Re: What to do about blowby?

Loose ring lands will let a rings line up the end gaps in less than a hr. of run time.I wish I could find the pict to prove it but wouldnt matter cause ya cant see the engine in that pict. BobRR
  #14  
Old 12-31-2004, 12:11:44 PM
Ken Majeski's Avatar
Ken Majeski Ken Majeski is offline
Subscriber
 
Join Date: Oct 2004
Location: South Lawton, Wisconsin
Posts: 2,768
Thanks: 1,543
Thanked 2,329 Times in 811 Posts
Images: 44
Default Re: What to do about blowby?

Well, I have never had the problem of the ring gaps lining up... I do know that the reason they pinned the early rings is because they were made much thicker on the side away from the gap and gravity would actually cause the heavy sides to end up on the bottom and cause the gaps to line up. But modern rings are no longer made that way. How many pinned rings have you ever seen in 2 cylinder John Deeres? and they were certainly successfull. I have removed lots of ring pins and have had no problems. Any compression problems I have ever had have been traceable to wear or lubrication issues.
__________________
Ken Majeski, Ellsworth Wis.
 


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Engine Blowby TomH Antique Gas Engine Discussion 7 07-26-2005 04:12:01 PM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 04:45:17 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277