Head gasket - Yamaha Rhino Forums - Yamaha UTV Forum
How-To's Database of technical articles to assist those do-it-yourselfers.

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 05-18-2009, 02:56 PM Thread Starter
Wide F'n Open
 
Join Date: Oct 2008
Posts: 294
Head gasket

Im posting this find about torque on rhino head gasket;Many have problems with blown head gaskets;While building Sandnu's new motor,I torqued all the main bolts,cross pattern,and noticed the gasket still had daylite through the cam chain chamber,torque the top 6mm to 9 lbs,still had daylite,;now im thinking either the head ,barrel or both are warped;not so since I had hand lapped both ; so here you go, I built a torque
plate to cover to two 6mm bolts that torque through the ball cap,on the cam chamber side,but with out the ball cap( cam cover),and torque to spec. The two main head bolts near the cam chamber lost ten lbs of torque.This might be why the head gasket blows out in this area.Conclusion,you need to simulate a torque program that when the engine top end is complete,all torque on bolts are per spec. This cannot be done without the torque plate,because when the cam cover is on ,you cannot check the head bolt torque.......just my findings
poflo is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 05-18-2009, 03:31 PM
Founding Ninja
 
07fj's Avatar
 
Join Date: Jun 2008
Location: ramona, ca
Posts: 3,156
Quote:
Originally Posted by poflo View Post
Im posting this find about torque on rhino head gasket;Many have problems with blown head gaskets;While building Sandnu's new motor,I torqued all the main bolts,cross pattern,and noticed the gasket still had daylite through the cam chain chamber,torque the top 6mm to 9 lbs,still had daylite,;now im thinking either the head ,barrel or both are warped;not so since I had hand lapped both ; so here you go, I built a torque
plate to cover to two 6mm bolts that torque through the ball cap,on the cam chamber side,but with out the ball cap( cam cover),and torque to spec. The two main head bolts near the cam chamber lost ten lbs of torque.This might be why the head gasket blows out in this area.Conclusion,you need to simulate a torque program that when the engine top end is complete,all torque on bolts are per spec. This cannot be done without the torque plate,because when the cam cover is on ,you cannot check the head bolt torque.......just my findings
we checked mine after 1500 miles total and over 800 on the 686 part and still perfect with stock bolts.

seems to me, if there is daylight it is not flat, IMO.

was there day light when setting them together with no gasket Don?

Rog



Benchmark Performance 686, 67.6 RWHP
http://www.unleashedutv.com/ 602-246-4011
Rigid Industries 480.655.0100
07fj is offline  
post #3 of 3 (permalink) Old 05-18-2009, 03:41 PM Thread Starter
Wide F'n Open
 
Join Date: Oct 2008
Posts: 294
We did both the head and barrel on a surface plate;I did not try a dry install
poflo is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha Rhino Forums - Yamaha UTV Forum 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










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
686 head gasket JNYBBAD Yamaha Rhino Performance Discussions 3 04-20-2009 09:46 AM
head pipe RED Want Ads 1 01-27-2009 08:32 AM
head work crackerjack Yamaha Rhino Performance Discussions 11 11-14-2008 03:09 PM
Dick Head!!! jimmmyzz Off-Topic Discussions 5 08-27-2008 06:20 AM
copper head gasket mx4life48 Yamaha Rhino Performance Discussions 4 07-06-2008 07:49 AM

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
 


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57