Garden Tractor Forums banner
1 - 12 of 12 Posts

·
Tractorholic
Joined
·
628 Posts
Discussion Starter · #1 ·
I cant seem to figure out how to get the head off the tecumseh oh 140. Its almost like the head has a bolt under the top cover where the rockers are. Its like the top cover is only being held on by the springs but how do you remove them when you cant put pressure on the bottom sides of the valves. What exactly do I need to do next??? Rockers and push rods are removed as well as the 3 bolts inside the rocker cover that bolt them to the head itself....Please Help it needs new rings.....Heres a recent pic....
 

Attachments

·
Fixer of Broken junk
Joined
·
4,796 Posts
Sounds like you missed a bolt or 2.

Here's a couple Pics that may help.





There are 6 bolts.
You need to take the valve springs off to get the bottom rocker box off of the head.

Getting them off is the easy part.Grab a socket that will sit on the top and give it a light tap with a mallet.The keepers will jump rite out.

Or go get a cheap OHV spring compressor.
Powerbuilt® Cam-Style Valve Spring Compressor - ToolSmithDirect.com

Harbor Freight has a really cheap set for like $5.00 if you have one of those stores close by.
 

·
Fixer of Broken junk
Joined
·
4,796 Posts
After you get the head off I would Lap the valves and replace every one of the rubber O rings as they tend to get hard and crack.The OH Tecumseh engines are notorious for leaking oil around the push tubes and where the rocker box seats around the valve guides.
 

·
Hangin' with the cool kids
Ontario, Canada
Joined
·
2,530 Posts
Doesnt look to me, by those pics, that a spring would be in the way if the head bolts

edit...Ahhh...the box...never mind...lol
 

·
Tractorholic
Joined
·
628 Posts
Discussion Starter · #6 ·
Thanks for the help everyone!!!!
 

·
Tractorholic
Joined
·
628 Posts
Discussion Starter · #7 ·
It Worked!!! Here are some pics...Got a question though...one out of the two studs that can be removed from the rocker arm box that get screws in them to hold the top ohv cover on broke, it is shown in the one pic...is there an easy way to get that out??? Thanks Again for the help!!!
 

Attachments

·
Fixer of Broken junk
Joined
·
4,796 Posts
Ouch broken off Way down in there isn't it.
If the stud would of been a bit bigger an easy out would do the trick.Unless you have a very steady drill hand and a really small easy out.
I don't see a way around it though.Drill it out and tap new threads.Looks like it was cross threaded last time it was off.

A slightly bigger bolt or stud shouldn't hurt anything.
 

·
Tractorholic
Joined
·
988 Posts
You could always see if someone had an undamaged rocker box. When those engines fail, it usually isn't the rocker box. It is usually a dropped valve guide.
 
  • Like
Reactions: Nascar3244888

·
Tractorholic
Joined
·
628 Posts
Discussion Starter · #10 ·
I will see if I can do anything with it and if not then I will see about getting another one
 

·
Old, but not dead -- yet!
Joined
·
3,273 Posts
A left-hand drill bit in a reversible (rotation will need to be in reverse) drill press is the best option for removal.

A left-hand drill bit in a reversible hand-held drill may work if you can keep the bit centered.
 
G

·
the dewalt bits seem to work best with no walking. centerpunch the center where you want to drill and just do in as straight as you can. i messed the one side of the kohler block up so the one bolt went in at a wierd angle and it still went fine. hope it works good for you.
 
1 - 12 of 12 Posts
Top