Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

TR10D with hole on piston head


  • Please log in to reply
7 replies to this topic

#1 Chubien ONLINE  

Chubien
  • Senior Member
  • Member No: 61561
  • 604 Thanks
  • 381 posts
  • Location: Montreal, Quebec

Posted November 22, 2015 - 02:45 PM

Decided to change the head gasket on my decent running 1000 today, I was surprised to notice a hole in the middle of the piston... What is this about? Is this the design of the piston or has it failed?

This engine ran fine other than blowing hot air around the gasket.

I have changed a few gaskets on these engines but never seen a "hole in the piston".

What is the consensus? Normal? Not ok? Is this just a different type of piston someone used when they rebuild the engine?

ImageUploadedByTapatalk1448221520.362715.jpg ImageUploadedByTapatalk1448221533.348201.jpg

#2 Eric OFFLINE  

Eric
  • Senior Member
  • Member No: 41778
  • 987 Thanks
  • 669 posts
  • Location: Wisconsin

Posted November 22, 2015 - 02:49 PM

I would say if it runs good leave it be, but not sure of the hole can't tell how deep it is from the pic.

#3 Rainier ONLINE  

Rainier
  • Senior Member
  • -GTt Supporter-
  • Member No: 53758
  • 375 Thanks
  • 391 posts
  • Location: Kingston wa.

Posted November 22, 2015 - 02:50 PM

Are you sure the hole goes all the way thru? Or is it a Manufacturing dent?
  • boyscout862 said thank you

#4 Tecumseh power OFFLINE  

Tecumseh power

    Jack of all trades, master of none.

  • Senior Member
  • Member No: 77571
  • 941 Thanks
  • 766 posts
  • Location: Vintondale pa

Posted November 22, 2015 - 02:55 PM

Looks like a dent from the manufacturer from the mold don't look the whole way through

#5 Bolens 1000 ONLINE  

Bolens 1000

    DR. Bolens

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 7
  • 12,672 Thanks
  • 17,198 posts
  • Location: Western NY

Posted November 22, 2015 - 02:56 PM

The oversize pistons generally had the hole in the center

 

s-l1600.jpg


  • Alc, boyscout862 and Chubien have said thanks

#6 Chubien ONLINE  

Chubien
  • Senior Member
  • Member No: 61561
  • 604 Thanks
  • 381 posts
  • Location: Montreal, Quebec

Posted November 22, 2015 - 02:56 PM

The hole does not go through, I used a small drill bit to get to the bottom by cutting through the carbon deposit, you can see the shiny spot in the bottom of the hole on the first pic.
  • boyscout862 said thank you

#7 Chubien ONLINE  

Chubien
  • Senior Member
  • Member No: 61561
  • 604 Thanks
  • 381 posts
  • Location: Montreal, Quebec

Posted November 22, 2015 - 02:59 PM

The oversize pistons generally had the hole in the center

s-l1600.jpg

Ah excellent, I figured it was manufacturing as the hole is perfectly round and perfectly centered.

What is the purpose of this?

Engine looks good other than one of the valve guides being a little worn, I have the part here and will have a go at changing that out.

#8 wilberj ONLINE  

wilberj
  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 51
  • 4,179 Thanks
  • 5,205 posts
  • Location: Michigan

Posted November 22, 2015 - 03:16 PM

The hole looks to be for a center for turning it on the lathe when it was made at the factory. 


  • Chubien said thank you




Top