(800) 853-2651
SHOP NOW

Farmal H pulling my hair out

T

Tom Hoffmann

New User
i have restored a 1945 H looks great ran good before now I have a popping sound thru the breather. Had head checked a Valves ground i have agjusted the valves time and time again had the tappets reground to perfect smooth rounded face i rebuilt the carburator wandering if something could be a problem there. i would apprecdiate any and all ideas.
 
Take compression check, valve to tight, valve not seating, or bad distrbutor cap, plug wires, fuel mixture. Hard to say, but I would check all that first. Good luck. Doug
 
It could well be a flat cam. With higher rpm automotive engines you can rev them up pretty high (in neuteral) and back off suddenly. You'll hear a "barking" through the carb.


Glenn F.
 
Yep,

Anytime you hear a constant, repetitive "popping" thru the intake, the problem is in the valve train and it's usually on the intake side.

"Just about always" a flat cam or a rocker off.

Sounds like he has already check everything else. :>)

Allan
 
Measure each intake valve for total lift by measuring as they go down. they should be all the same within .010. This checks for a flat lobe on the cam.
Do a cylinder leakdown check if the lift numbers look very good. Jim
 
Had a similar condition on a 41 h with magnito ignition - turned out to be the coil. I ended up replacing/reconditioning numerous parts unnecessarily.
 
thank you everyone I am going to check compression and carburator which i rebuilt but was not happy with the way the packing went back on the shaft if none of this works i will check the cam, i believe i have checked everything else that has been mentioned thanks again for all your advice.

Tom
 
(quoted from post at 09:15:25 09/15/10) Yep,

Anytime you hear a constant, repetitive "popping" thru the intake, the problem is in the valve train and it's usually on the intake side.

"Just about always" a flat cam or a rocker off.

Sounds like he has already check everything else. :>)

Allan
Click to expand...

Allan, I don't often disagree with your diagnostics but in this case I would make an argument for the exhaust causing the problem rather than an intake valve.

An exhaust valve not opening or one that does stay open for the proper duration will cause a more pronounced popping in the intake manifold than a problem with an intake valve. An engine can have good compression in a cylinder with a non functioning exhaust valve because air can enter through the intake but will pop when the intake opens because the compressed air is still in the cylinder when the valve opens. An intake problem will cause a loss of compression in the cylinder making it less likely to make a sharp popping noise.
 
You must log in or register to reply here.

Similar threads

B
Oil on my Plugs, but WHERE is it From?
Replies
11
Views
398
used red MN
U
H
IH 574 Gas - Popping Under Load - At my wit's end
Replies
6
Views
776
sandcastle1
S
C
Carb won't stop dripping. What am I missing??
Replies
13
Views
1K
Mad Farmer
M
K
1953 farmall super h
Replies
17
Views
518
wilson ind
W
I
My Sputtering H
Replies
10
Views
368
ionfuel
I
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.

Copyright © 1997-2024 Yesterday's Tractor Co.

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
Website Accessibility Policy

Back
Top