Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile    Log inLog in 

Intermittent blow by 3cyl diesel


 
Post new topic    
View previous topic :: View next topic  
Author Message
root
Regular


Joined: 20 Mar 2021
Posts: 44


Report to Moderator

PostPosted: Sat May 15, 2021 6:34 am    Post subject: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

Ive been tilling with this new to me tractor. Its a 3cyl diesel 4000. Sometimes I get smoke out of the vent tube as soon as it starts. Once it warm and working it get more smoke than I like and some oil mist. Other times I use it doing the same thing and not a whisp of smoke or drop of oil from the vent tube. Im new to 3cly diesel but not engines. Im guessing a sticking compression ring but wanted to get opinions from the experts in case Im making a mountain out of a mole hill.
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 7931


Report to Moderator

PostPosted: Sat May 15, 2021 10:01 am    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

The amount of blowby is not likely to be intermittent. More likely is the fact that wind and sunlight direction changes make it more or less noticeable. A little bit of blowby in just the right angle of sunlight can look very bad.

Two questions to ask yourself: 1) Does the engine start easily in cold weather? 2) Can you feel distinct pulses coming out of the blowby tube? If the first answer was yes, and the second was no, you're fine, motor on.
 
Back to top
View user's profile
root
Regular


Joined: 20 Mar 2021
Posts: 44


Report to Moderator

PostPosted: Sat May 15, 2021 3:37 pm    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

CVPost-Bern wrote:
(quoted from post at 11:01:05 05/15/21) The amount of blowby is not likely to be intermittent. More likely is the fact that wind and sunlight direction changes make it more or less noticeable. A little bit of blowby in just the right angle of sunlight can look very bad.

Two questions to ask yourself: 1) Does the engine start easily in cold weather? 2) Can you feel distinct pulses coming out of the blowby tube? If the first answer was yes, and the second was no, you're fine, motor on.


To answer your questions.

Sometimes it fires up instantly when cold. Other times it takes a bit to get it going. As for the vent tube it depends. If its smoking you can feel positive pressure. If its not smoking I cant feel any noticeable pressure coming from the vent tube. It doesnt make any sense to me as to why it does it. It definitely isnt sunlight or some other optical illusion. If it smokes you can see it in the barn. If it doesnt you dont notice anything inside the barn when it starts.
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 7931


Report to Moderator

PostPosted: Sat May 15, 2021 3:55 pm    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

If it fires up instantly when cold, your compression is fine. Pressure at the blowby tube is normal, pulsing is not. If no
pulsing, motor on.
 
Back to top
View user's profile
root
Regular


Joined: 20 Mar 2021
Posts: 44


Report to Moderator

PostPosted: Sat May 15, 2021 7:39 pm    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

CVPost-Bern wrote:
(quoted from post at 16:55:41 05/15/21) If it fires up instantly when cold, your compression is fine. Pressure at the blowby tube is normal, pulsing is not. If no
pulsing, motor on.


Cold starts are hit and miss. Its been in the 40s most mornings when I go out. Probably in the 50s inside the barn. If it starts quick I dont get any smoke. If it doesnt start quick the it takes 25-30 seconds of cranking to get it going and the smoke out of the vent comes as soon as its started.
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 7931


Report to Moderator

PostPosted: Sun May 16, 2021 5:36 am    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

An engine is either wore out or it's not. It can't be bad one morning and fine the next.

On the mornings where you have to crank it 30 seconds, is there any white smoke coming out of the exhaust while cranking? If
not, you have a fuel issue of some sort.
 
Back to top
View user's profile
root
Regular


Joined: 20 Mar 2021
Posts: 44


Report to Moderator

PostPosted: Mon May 17, 2021 4:31 am    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

CVPost-Bern wrote:
(quoted from post at 06:36:29 05/16/21) An engine is either wore out or it's not. It can't be bad one morning and fine the next.

On the mornings where you have to crank it 30 seconds, is there any white smoke coming out of the exhaust while cranking? If
not, you have a fuel issue of some sort.


This morning I started it. It was 49 degrees and I got puffs of white smoke for about 20-25 seconds. Ill keep watching every time I start it to see if thats always the case.
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 7931


Report to Moderator

PostPosted: Mon May 17, 2021 11:24 am    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

White smoke while cranking would indicate that it's getting fuel, which would lean towards a compression problem. I have no reasonable explanation as to why it would start great one morning but not the next, assuming the temps are similar.
 
Back to top
View user's profile
root
Regular


Joined: 20 Mar 2021
Posts: 44


Report to Moderator

PostPosted: Mon May 17, 2021 1:58 pm    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

CVPost-Bern wrote:
(quoted from post at 12:24:06 05/17/21) White smoke while cranking would indicate that it's getting fuel, which would lean towards a compression problem. I have no reasonable explanation as to why it would start great one morning but not the next, assuming the temps are similar.


Im suspecting maybe a sticking valve. Thats about all I can come up with that would cause it.
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 7931


Report to Moderator

PostPosted: Mon May 17, 2021 2:17 pm    Post subject: Re: Intermittent blow by 3cyl diesel Reply to specific post Reply with quote

A sticking valve could certainly cause low compression and hard starting, but it would have nothing to do with excessive blowby. That has to come past the pistons and rings. An intermittent sticking ring is something that I suppose is conceivably possible, but it's not something I've ever seen personally. Besides, even if you did have such a scenario inside your engine in one cylinder, the other 2 cylinders should still fire right off. And, realistically, the same would be true with a sticking valve.

The ONLY other thing I can think of that could explain easy starts vs hard starts is hydraulic loading, such as a remote valve spool that is stuck on. That would not account for blowby however.
 
Back to top
View user's profile
:   
Post new topic    Yesterday's Tractors Forum Index -> Ford All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  

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 ]

YT Home  |  Forums

Modern View Forum powered by phpBB © 2001, 2005 phpBB Group

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters