2GM20F Starting? - Page 2 - SailNet Community
 2Likes
Reply
 
LinkBack Thread Tools
post #11 of 13 Old 07-03-2012
Junior Member
 
Join Date: May 2012
Location: Sydney,Australia
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: 2GM20F Starting?

Try manually turning engine when cold & then hot if there is a noticable difference in lower compression when cold then remove the rocker cover (cold engine) & when each valve closes make sure the rocker arm is not hard on top of valve causing it not to seal creating loss of compression & that there is some slight play. If not adjust valve clearances & yes if this is the fault it will still start & run ok but will not rev as high.

Last edited by hindsight; 07-03-2012 at 03:11 AM.
hindsight is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 13 Old 07-03-2012
Junior Member
 
Join Date: May 2012
Location: Sydney,Australia
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: 2GM20F Starting?

If you find manually turning engine when cold is noticeably easier than after it,s been running then remove rocker cover & make sure that when each valve closes the rocker arm is not hard on top of valve therefore preventing it from fully sealing & causing loss of compression, if so then adjust valve clearances & yes it will still start & run ok with this fault but will not rev as high

Last edited by hindsight; 07-03-2012 at 03:33 AM.
hindsight is offline  
Quote Quick Reply Share with Facebook
post #13 of 13 Old 07-03-2012
Senior Pirate
 
TropicCat's Avatar
 
Join Date: Oct 2008
Location: Cape Canaveral, FL
Posts: 2,561
Thanks: 5
Thanked 14 Times in 14 Posts
Rep Power: 7
 
Re: 2GM20F Starting?

Although I agree that an air leak causes hard starting, it also makes for a rough running engine. .... So...This will make the third answer suggesting you adjust the valves. This is a real easy procedure, will only cost the price of a valve cover gasket and you'll be done in 10 minutes.

Tropic Cat

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
TropicCat is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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



Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 2GM20F Suave Gear & Maintenance 2 05-16-2011 10:33 AM
yanmar 2GM20F oil burner seadog47 Diesel 11 10-16-2009 06:34 AM
2gm20F Fan Belts rjc9136quinn Diesel 9 10-08-2009 03:02 PM
Yanmar 2GM20F Petar Gear & Maintenance 13 10-02-2009 06:49 PM
pencil zincs on 2GM20F? bradfalk Gear & Maintenance 4 03-26-2009 03:23 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

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