Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Overhaul

Thread Tools Display Modes
  #1   IP:
Old 11-20-2011, 11:02 PM
Sailor Ron Sailor Ron is offline
Frequent Contributor
Join Date: Jun 2011
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Valve removal

Head and valve cover have been removed on my 1980 A4 that I can do valve repair job. One of the valves is stuck and others probably should be reseated as compression is low.

Can I remove the valves with the exhaust manifold in place? I see a valve spring removal tool on MM catalogue but unlikely it will reach with manifold in place. Any other way to remove the retainer clips?
Reply With Quote
  #2   IP:
Old 11-20-2011, 11:11 PM
Loki9's Avatar
Loki9 Loki9 is offline
Join Date: Jul 2011
Location: Long Island, NY
Posts: 382
Thanks: 0
Thanked 3 Times in 3 Posts
It might be possible to remove them with the manifold in place, but I think it will be impossible to put them back in.

One tip: before you remove the keepers, block the oil drain holes with a rag or paper towel. The keepers can and will fall through those holes into the oil pan. Don't ask me how I know
Jeff Taylor
Baltic 38DP
Reply With Quote
  #3   IP:
Old 11-21-2011, 09:05 AM
ILikeRust's Avatar
ILikeRust ILikeRust is offline
Afourian MVP
Join Date: Sep 2010
Location: Henrico, VA
Posts: 2,203
Thanks: 2
Thanked 7 Times in 5 Posts
Originally Posted by Sailor Ron View Post
Can I remove the valves with the exhaust manifold in place?
If you had very thin, stretchy and strong fingers like Plastic Man, maybe. But for us mere mortals, I think you'll find the going much easier if you get the manifold out of your way first.
- Bill T.
- Richmond, VA

Relentless pursuer of lost causes
Reply With Quote
  #4   IP:
Old 11-21-2011, 01:06 PM
Bold Rascal's Avatar
Bold Rascal Bold Rascal is offline
Senior Member
Join Date: Mar 2011
Location: Princess Anne, MD
Posts: 302
Thanks: 0
Thanked 0 Times in 0 Posts
Oh yeah, done that...

Welcome to the forum Ron.
I can appreciatte your not wanting to remove the manifold. If that's all you have to remove to get to your valves your very fortunate.

I had to pull the entire engine first, and then the manifold. It did require more than a few extra hours but sure saved on my back, neck and frustration levels.

Good tip for you to plug those valve chamber oil drain holes first thing after getting that cover plate off.

Mike, Slower-Lower Eastern shore, MD
1973 Pearson 33
1967 Bristol 27
Reply With Quote
  #5   IP:
Old 11-21-2011, 07:17 PM
thatch thatch is offline
Afourian MVP
Join Date: Dec 2009
Location: Santa clarita, Ca.
Posts: 1,014
Thanks: 82
Thanked 144 Times in 89 Posts
"Valve removal'

Hi Ron,
Removing the valves (much less trying to reinstall them) without removing the manifold is next to impossible. Before doing anything else, start soaking the offending valve stem with Kroil or PB Blaster. Kroil is only available on the internet so don't bother to look in stores. Depending on how far the valve is stuck open will determine if the spring can be collapsed enough to remove the keepers. I would definately give the oil soaking and an occasional light tapping on the center of that valve with a wooden dowell and hammer before doing anything drastic. Both the valves and guides are steel and are quite prone to sticking but there is usually enough clearance between them for penetrating oil to loosten them up. A small engine valve spring compressor, like the one Moyer sells, is the right tool for the job.
Reply With Quote
  #6   IP:
Old 11-22-2011, 08:42 AM
sastanley's Avatar
sastanley sastanley is offline
Afourian MVP
Join Date: Sep 2008
Location: Solomons, MD
Posts: 6,611
Thanks: 568
Thanked 326 Times in 257 Posts
Ron, I had sticky valves (my motor has been drowned a few times prior to my ownership) and I was able to free them up with MMO squirted into the cylinders, similar to Tom's approach. If you can get it to free up with a penetrating oil, you might be able to lube the guides with MMO. For about 3 or 4 months, I squirted MMO in religiously after every use and then it it sit with MMO in between runs & it eventually popped free. Mine was never stuck wide open to the point I was losing an entire cylinder though.

"Twice Around" - '77 Catalina 30, #511 with original A-4 & MMI manifold.
She is always happy with a clean bottom!
Reply With Quote

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
valve removal JarrettF Overhaul 5 05-26-2008 09:03 PM
E-27 A4 removal to repair valve #4 cly rsanburn Ericson 2 06-06-2007 07:36 AM
E-27 A4 removal to repair valve #4 cly rsanburn Ericson 0 05-09-2007 02:16 PM
Valve Guide Removal Zack Overhaul 1 05-13-2005 03:23 PM

All times are GMT -4. The time now is 01:06 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2019 Moyer Marine Inc.

All Rights Reserved