TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

Allis Chalmers	Case	Farmall IH	Ford 8N,9N,2N	Ford
Ferguson	John Deere	Massey Ferguson	Minn. Moline	Oliver

Ford 9N, 2N & 8N Discussion Forum

Compression Test...the results.

Welcome Guest, Log in or Register

Author

AnvilheadTX

05-13-2007 18:30:29

Report to Moderator

And the results from today's compression test (on my prject 8N) are as follows:
4 = 91
3 = 91
2 = 90
and....drum roll please..... ..... ....
1 = 30

I tried #1 wet and it went to 65 or so.

You may recall the project tractor developed a very evident blow-by (a few weeks ago). The tractor has been stored for ten years and did not run when I bought it. Any suggestions on how to proceed? Since I have excellent compression on three can I get around fixing #1 and avoid an expensive total re-build? Thanks for your advice in advance.

[Log in to Reply] [No Email]

Brian Bell

05-14-2007 06:45:07

Report to Moderator

Re: Compression Test...the results. in reply to AnvilheadTX, 05-13-2007 18:30:29

I had the same thing happen to #1 on my '51 8N. Did a wealth of testing and ended up pulling the head. When I got it apart I found a piston "flopping around" in the block with the sleeve in a thousand pieces in the oil pan. Upon further inspection, I found several pistons with broke rings and another sleeve that was loose. I just replaced what was broke, put in new rings on the good pistons and new rod bearings and put 'er back together. Runs like a champ! Spent less than $300 all together including having the head surfaced to ensure that it was flat!

[Log in to Reply] [No Email]

Jerry/MT

05-13-2007 21:03:50

Report to Moderator

Re: Compression Test...the results. in reply to AnvilheadTX, 05-13-2007 18:30:29

You may have a stuck valve or a burned valve. Take the side cover off and check to see if the valve is sticking. If it is, spray some brake cleaner on it to free it up, and when you do, re run your compression test.

[Log in to Reply] [No Email]

Uhhhh?

05-14-2007 06:48:00

Report to Moderator

Re: Compression Test...the results. in reply to Jerry/MT, 05-13-2007 21:03:50

How would a stuck or burned valve cause blow-by?

[Log in to Reply] [No Email]

Jerry/MT

05-14-2007 15:09:28

Report to Moderator

Re: Compression Test...the results. in reply to Uhhhh?, 05-14-2007 06:48:00

If you'll read the post, you'll see he had one cylinder with very low compression and it it only slightly improved when he oiled the cylinder and repeated the test.(You'll note the title was "Compression Test...the Results".) I was responding to the compression problem not a blow by problem.

[Log in to Reply] [No Email]

Hobo,NC

05-13-2007 18:44:25

Report to Moderator

Re: Compression Test...the results. in reply to AnvilheadTX, 05-13-2007 18:30:29

You may recall the project tractor developed a very evident blow-by, no i don"t recall but blow by would only come from one place, care to make a guess.

[Log in to Reply] [No Email]

Vern-MI

05-14-2007 04:14:53

Report to Moderator

Re: Compression Test...the results. in reply to Hobo,NC, 05-13-2007 18:44:25

Stuck worn or broken ring(s)

[Log in to Reply] [No Email]

AnvilheadTX

05-13-2007 18:55:59

Report to Moderator

Re: Compression Test...the results. in reply to Hobo,NC, 05-13-2007 18:44:25

I posted to message about the blow by a few weeks ago - sorry to assume you might recall the message.

[Log in to Reply] [No Email]

Dunk

05-13-2007 18:37:26

Report to Moderator

Re: Compression Test...the results. in reply to AnvilheadTX, 05-13-2007 18:30:29

IMO

Anything that excessive is..

1: your head gasket.

2: your head gasket.

3: Valves? (maybe??)

[Log in to Reply] [No Email]

gahorN

05-13-2007 20:58:17

Report to Moderator

Re: Compression Test...the results. in reply to Dunk, 05-13-2007 18:37:26

I would contribute that it's strongly possible you have a piston/rings broken or sleeve that has self-destructed and is down in the sump.

Put the questionable cylinder on top/dead/center and charge the cylinder with compressed air. (About 75 psi should do it.... do this with the tractor in high-gear and the wheels chocked so it doesn't move. Listen to the exhaust and carb inlet to determine if a valve ...and which one...is leaking. If no valve is leaking...pull the oil filler cap off and listen for air down in the crankcase...indicating bad rings/piston/sleeve.) Pull the head to find out for certain. If you must repair the piston/sleeve you'll have to drop the sump also. It's not a hard job to do actually. Just block the tractor up at the bell housing/tranny area, and disconnect the front axle and pull it forward (the tires will go pigeon-toed) and drop the sump/oil pan. Do the repair, and then put it back together. Simple.

[Log in to Reply] [No Email]

[Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

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 ]

Home | Forums

Copyright © 1997-2023 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