Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


OK Cub heads Cox_ba12




Cox Engines Forum

The official forum for 24/7 Cox Engines and Model Discussion! Ask Questions, Answer Questions, Discuss Cox engines, Cox products, anything CL, FF, RC, 1/2A, and more! Although memberships are encouraged, guests are always welcome!

OK Cub heads Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 

Rechercher Advanced Search

Latest topics
» Free Flight Radio Assist
by rsv1cox Today at 12:40 pm

» Broken ebay S/W SB-X
by rsv1cox Today at 12:30 pm

» Old CL Gee Bee
by rsv1cox Today at 12:12 pm

» My N-1R build log
by rdw777 Today at 10:51 am

» General attention:
by MauricioB Today at 8:40 am

» How's the weather?
by rsv1cox Today at 8:06 am

» For sale Super Stunter Cox
by pakiu Today at 5:50 am

» music vids.. some of your favorites
by HalfaDave Yesterday at 11:48 am

» More Fun with the Scanner: My May '67 Issue of Model Airplane News: "The Demoiselle"
by rsv1cox Wed Dec 11, 2024 3:31 pm

» Still MORE Scanning: Dale Kirn's "290-Special" in M.A.N. June,1967
by 944_Jim Wed Dec 11, 2024 10:35 am

» **VOTE-ON-THE-NEXT-COX-ENGINE-OF-THE-MONTH** (December 2024)
by MauricioB Wed Dec 11, 2024 4:04 am

» EXTREMELY RARE COX THIMBLE DROME PROTOTYPE "BLACK WIDOW" GAS MODEL AIRPLANE
by a betancourt Tue Dec 10, 2024 2:44 pm

Info
Cox Engine of The Month
December-2024
roddie's

".049 reed-valve marine conversion"

More info on this engine!


PAST WINNERS
CEF Traveling Engine
Win This Engine!
Gallery


OK Cub heads Empty
Live on Patrol


OK Cub heads

Cox Engines Forum  :: Engines :: Non-Cox Engines

Go down

OK Cub heads Empty OK Cub heads

Post  jjscott Sun Apr 07, 2013 3:03 pm

I seem to have purchased an OK Cub 099 with a shrunken head. It looked good in the ebay listing. When it arrived it was dry with not much compression. I took the plug out to drop some oil in the cylinder. When I tightened the plug the whole head turned and popped out.

The head is smaller than the cylinder, but not by much. There is enough interference so it sort of grabs on the last thread. The head can be pushed straight down into the threaded cylinder opening; just the edges of the threads touch. The threads on the head and inside of the cylinder look fine and not stripped or worn. Could I have an 074 head on a 099? Does anyone know if the 074 and 099 are very close in size?

Jim
jjscott
jjscott
Bronze Member
Bronze Member

Posts : 34
Join date : 2013-01-12
Location : Wisconsin

Back to top Go down

OK Cub heads Empty Re: OK Cub heads

Post  SuperDave Sun Apr 07, 2013 5:14 pm

No they are not "close in size".

Sounds like you have the wrong cylinder head for the engine.

Edit: I'd have to see it to be sure.

SD


Last edited by SuperDave on Wed Apr 10, 2013 8:33 am; edited 1 time in total
SuperDave
SuperDave
Rest In Peace
Rest In Peace

Posts : 3552
Join date : 2011-08-13
Location : Washington (state)

Back to top Go down

OK Cub heads Empty Re: OK Cub heads

Post  Mark Boesen Tue Apr 09, 2013 9:01 pm

i think they're close but not the same, sounds like thats whats happened.
Mark Boesen
Mark Boesen
Top Poster
Top Poster

Posts : 3985
Join date : 2011-09-01
Age : 66
Location : Rockford, Il

http://groups.yahoo.com/group/049Collectors/

Back to top Go down

OK Cub heads Empty Re: OK Cub heads

Post  jjscott Wed Apr 10, 2013 7:53 am

Thanks for the replies. It seems a certainty that the head is off an 074. I contacted the seller, who is a well-known engine parts guy. He is providing (selling) me another 099 from which I can take the head to get one good engine. If this engine arrives and the head does not fit it's back to square one.

Jim
jjscott
jjscott
Bronze Member
Bronze Member

Posts : 34
Join date : 2013-01-12
Location : Wisconsin

Back to top Go down

OK Cub heads Empty Re: OK Cub heads

Post  SuperDave Wed Apr 10, 2013 9:04 am

Jim:

Hope the replacement head works for you.

Although I have a nice OK Cub .049B it is an orphan among my family of Coxes which have far greater parts and support readilly available.

Mark Boesen here on the forum is our "go to guy" for OK Cub matters. Mark has helped me and I appreciate his assistance. Clapping

SD
SuperDave
SuperDave
Rest In Peace
Rest In Peace

Posts : 3552
Join date : 2011-08-13
Location : Washington (state)

Back to top Go down

OK Cub heads Empty Re: OK Cub heads

Post  Mark Boesen Wed Apr 10, 2013 1:23 pm

thanks Dave!
Mark Boesen
Mark Boesen
Top Poster
Top Poster

Posts : 3985
Join date : 2011-09-01
Age : 66
Location : Rockford, Il

http://groups.yahoo.com/group/049Collectors/

Back to top Go down

OK Cub heads Empty Re: OK Cub heads

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

Cox Engines Forum  :: Engines :: Non-Cox Engines

 
Permissions in this forum:
You cannot reply to topics in this forum