Why are there holes drilled in engine block? - Yamaha R6 Forum: YZF-R6 Forums
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 06-21-2019, 10:48 AM Thread Starter
Just made this great wheelie.. did you see it?!
 
davyk85's Avatar
 
Join Date: Sep 2018
Posts: 32
Why are there holes drilled in engine block?

Anybody any ideas why somebody would have drilled holes in an engine case? Just noticed these and wondering if anyone has any idea about it
Attached Images
File Type: jpg 20190621_184522_1561139261991.jpg (515.1 KB, 37 views)
davyk85 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 06-21-2019, 05:34 PM
I eat my R6
 
Join Date: Jan 2016
Posts: 2,684
Bike: 2015 R1
Garage
Re: Why are there holes drilled in engine block?

it's factory. no I don't know what they're for. possibly an assembly reason.
yamahacrazy is offline  
post #3 of 8 (permalink) Old 06-21-2019, 10:01 PM Thread Starter
Just made this great wheelie.. did you see it?!
 
davyk85's Avatar
 
Join Date: Sep 2018
Posts: 32
Quote:
Originally Posted by yamahacrazy View Post
it's factory. no I don't know what they're for. possibly an assembly reason.
That's good I thought the previous owner might've done it as I was looking at some used engines on Ebay and couldn't see any holes on those.
davyk85 is offline  
post #4 of 8 (permalink) Old 06-22-2019, 05:14 AM
Why yes I don't!!!!!!!!!!
 
TurboBlew's Avatar
 
Join Date: Jun 2010
Location: FL
Posts: 4,721
Bike: 2007 In Heaven
Re: Why are there holes drilled in engine block?

Quote:
Originally Posted by yamahacrazy View Post
it's factory. no I don't know what they're for. possibly an assembly reason.
whaaa??? What sand cast cases have rando holes formed in them??
Easy fix but factory? I dont think so.
TurboBlew is offline  
post #5 of 8 (permalink) Old 06-22-2019, 08:30 AM
I eat my R6
 
Join Date: Dec 2014
Location: Southwest Ohio
Posts: 1,263
Bike: 2008 Yamaha YZF-R6s Stock
Re: Why are there holes drilled in engine block?

The reverse side of those holes are flared. If they were a little lower I'd speculate water drain. YC is right, they're factory.
Intuit is offline  
post #6 of 8 (permalink) Old 06-22-2019, 01:26 PM
I eat my R6
 
Join Date: Jan 2016
Posts: 2,684
Bike: 2015 R1
Garage
Re: Why are there holes drilled in engine block?

Quote:
Originally Posted by TurboBlew View Post
whaaa??? What sand cast cases have rando holes formed in them??
Easy fix but factory? I dont think so.
lol they're machined holes obviously. castings can have holes. it called cores. trust me, I worked making molds for the casting industry for 6 years. how do you think they get all the coolant jackets in the head and block?

I was saying maybe there in that spot so the robots can pick it up etc. or it's so they can sit on a stand the way they need it. im 99% sure mine had them also. intuit can tell us. he has the same bike

here is how it works,

To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.

Last edited by yamahacrazy; 06-22-2019 at 01:39 PM.
yamahacrazy is offline  
post #7 of 8 (permalink) Old 06-23-2019, 05:31 AM
Why yes I don't!!!!!!!!!!
 
TurboBlew's Avatar
 
Join Date: Jun 2010
Location: FL
Posts: 4,721
Bike: 2007 In Heaven
Re: Why are there holes drilled in engine block?

Quote:
Originally Posted by yamahacrazy View Post
lol they're machined holes obviously. castings can have holes. it called cores. trust me, I worked making molds for the casting industry for 6 years. how do you think they get all the coolant jackets in the head and block?

from the looks of the pic seems to be on the back side of the engine in the transmission area and not very cleanly bored. Cant say Ive ever seen holes done like that. Weep holes for water? Again never seen anything like that on a stock casting.
TurboBlew is offline  
post #8 of 8 (permalink) Old 06-23-2019, 06:44 AM
I eat my R6
 
Join Date: Dec 2014
Location: Southwest Ohio
Posts: 1,263
Bike: 2008 Yamaha YZF-R6s Stock
Re: Why are there holes drilled in engine block?

Mine has them. Contrary to assumptions, these aluminum alloys do degrade, but it shows as white powdery splotches; and that's what we're seeing in the photos.

The side he photographed is flat, but the other side is flared, like these.


To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.


It opens up to the area beneath the seat, so the amount of corrosion is minimal; looks clean as opposed to the other side. It may be that corrosion that gives the OP's photograph the rough "drilled" look. Based on the other side I doubt they're machined; though it's still perfectly possible.

Maybe they stuck wires through these holes for hanging them up while dipping them or something?
Intuit is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha R6 Forum: YZF-R6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome