Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 18-07-2013, 05:15   #16
Registered User
 
Group9's Avatar

Join Date: Sep 2010
Posts: 1,599
Images: 7
Re: I was bored so pulled the head on my yanmar

Quote:
Originally Posted by ohdrinkboy View Post
i'm in awe of sailorchic
Please don't tell me she can back a trailer, too.
__________________

__________________
Group9 is offline   Reply With Quote
Old 18-07-2013, 07:29   #17
Registered User

Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 7,955
Quote:
Originally Posted by Group9 View Post

Please don't tell me she can back a trailer, too.
Judging from her other posts she knows lots of other boat stuff too.

Wow, what a woman...please post pictures of toolbox. ; )
__________________

__________________
belizesailor is offline   Reply With Quote
Old 18-07-2013, 09:00   #18
Registered User
 
Krogensailor's Avatar

Join Date: May 2013
Location: Naples Fl
Boat: Kadey Krogen 38 cutter
Posts: 355
Images: 13
Re: I was bored so pulled the head on my yanmar

Quote:
Originally Posted by Navatech View Post
What you SHOULD have done is do a compression test BEFORE pulling the head...
I agree. And I'm sure you know that when doing the compression test, if a cyclinder show low you can repeat the test by adding a squirt of oil in the cylinder. If the pressure rises, I get this backwards sometime's, if it rises it indicate rings and if it stays the same it indicates valve problems. Also you can't check for flatness of a surface with an aluminum ext. You'll need a machinist straight edge. Lastly, I have a VW pathfinder and it is a zero clearence engine. The head can not be decked. Good luck
__________________
Krogensailor is offline   Reply With Quote
Old 18-07-2013, 10:09   #19
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,815
Re: I was bored so pulled the head on my yanmar

Well, last night I added oil (1/3 cup) to all three cylinders. This morning #1 and #2 are basically unchanged. #3 is almost empty. Now #1 was the cylinder with the relatively heavy carbon buildup. #2 looks new, and top of #3 was black with tan buildup in a few places, So #3 looks like bad/broken rings. I'll probably check #1 too while its out. Guess what I'll be doing this next week.

Yes, If I had money, I would have hired a mechanic to do a compression test, or purchased a diesel compression tester. But I barely have money for ANY parts, let alone a $200+ compression tester. So I make do.

HAHAHA tool box.. I have a canvas tool bag with sockets and such, a west marine tote bag for bigger things. I also keep a small set of metric sockets and a set of metric wrenches, each in their own zip lock bag, next to the engine.

While I have backed a trailer in the past, lets just say that straight line backing is highly over rated.
__________________
sailorchic34 is offline   Reply With Quote
Old 18-07-2013, 10:18   #20
Registered User
 
Krogensailor's Avatar

Join Date: May 2013
Location: Naples Fl
Boat: Kadey Krogen 38 cutter
Posts: 355
Images: 13
Re: I was bored so pulled the head on my yanmar

Having read some of your post's in the past, I'm sure you'll get it done.
__________________
Krogensailor is offline   Reply With Quote
Old 18-07-2013, 10:49   #21
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: I was bored so pulled the head on my yanmar

Just a reminder about my post ages ago: My 3GM30 was hard starting, although ran well at crusing speed......... and had a broken ring land on one piston. Cant see it without pulling the piston unfortunately.... unless it starts eating into the cylider wall...
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is online now   Reply With Quote
Old 18-07-2013, 10:53   #22
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,815
Re: I was bored so pulled the head on my yanmar

Quote:
Originally Posted by Cheechako View Post
Just a reminder about my post ages ago: My 3GM30 was hard starting, although ran well at crusing speed......... and had a broken ring land on one piston. Cant see it without pulling the piston unfortunately.... unless it starts eating into the cylider wall...
I remember that. Figure I'll be pulling the engine and pistons. Cylinder walls look ok, That is no wear marks and zero ridge at top of cylinders. Though I need to find someone with a micrometer.
__________________
sailorchic34 is offline   Reply With Quote
Old 18-07-2013, 13:45   #23
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,815
Re: I was bored so pulled the head on my yanmar

Oh Groovy..... So noticed finally that I have grooves in #3 cylinder at 3 and 9 o-clock (12 noon facing the front of the engine. The groove at 3 oclock is thin but I can just catch a knife blade edge on it. At 9 oclock there are two grooves shallow but wide (1/8" ish) and at the top there is a horizontal lip about an inch long about 3/4" down from the top. I can just feel it with my fingers. Pretty much all the grooves stop about 3/4 inch down. There are a few other very light grooves at 10 oclock that can't be felt.

So It's looking like a broken ring or land or something. so happy... not. Doing small things today, disconnecting stuff from engine and transmission and getting it ready for removal. Tomorrow I'll play tug of war with it. That should be fun.
__________________
sailorchic34 is offline   Reply With Quote
Old 20-07-2013, 04:17   #24
Registered User

Join Date: Apr 2013
Posts: 23
Re: I was bored so pulled the head on my yanmar

Quote:
Originally Posted by sailorchic34 View Post
let alone a $200+ compression tester
Craftsman is currently selling their compression tester for $58.49 (regularly $64.99)... Harbor Freight has their basic diesel compression tester currently for $29.99...
__________________
Navatech is offline   Reply With Quote
Old 20-07-2013, 06:46   #25
Registered User

Join Date: Oct 2009
Location: Naples, Florida, USA
Boat: Dean 400, 40' catamaran, Daruma
Posts: 124
Re: I was bored so pulled the head on my yanmar

For certain you have a broken ring land or 2 due to someone giving it a sniff of either in the past. Little Yanmars don't mix well with either, I've had the same experience. New piston with rings was in the $140. range as I recall. I ended up going oversized with new seals, bearings and cam bearings. Good luck.
__________________
dlockhart is offline   Reply With Quote
Old 20-07-2013, 07:08   #26
cruiser

Join Date: May 2010
Location: SF Bay Area; Former Annapolis and MA Liveaboard.
Boat: Looking and saving for my next...mid-atlantic coast
Posts: 6,197
Re: I was bored so pulled the head on my yanmar

This is inspirational.

__________________
SaltyMonkey is offline   Reply With Quote
Old 20-07-2013, 07:32   #27
Registered User

Join Date: Jan 2010
Location: Port Ludlow Wa
Boat: Makela,Ingrid38,Idora
Posts: 1,974
Re: I was bored so pulled the head on my yanmar

Must plus one on all the praise. This is what boats are all about.
__________________
IdoraKeeper is offline   Reply With Quote
Old 20-07-2013, 09:39   #28
Senior Cruiser

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Cruising NC, FL, Bahamas, TCI & VIs
Boat: 1964 Pearson Ariel 'Faith' / Pearson 424, sv Emerald Tide
Posts: 1,531
Re: I was bored so pulled the head on my yanmar

Hey Chick,

First, add my voice to those telling you how cool you are. I hear folks say how they " could never do that" and you are doing it.

I know you said $$$ is tight, but in the midst of everything else you are doing, please send your injectors in to a good shop to have them tested. #3 may have been damaged by either as the earlier poster said.... But lack of fuel from a slow-to-pop injector could cause problems too...

Hate to see you fix one problem without fixing the one that caused it in the first place.

Good luck!
__________________
s/v 'Faith' is offline   Reply With Quote
Old 20-07-2013, 10:59   #29
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: I was bored so pulled the head on my yanmar

Quote:
Originally Posted by dlockhart View Post
For certain you have a broken ring land or 2 due to someone giving it a sniff of either in the past. Little Yanmars don't mix well with either, I've had the same experience. New piston with rings was in the $140. range as I recall. I ended up going oversized with new seals, bearings and cam bearings. Good luck.
Yanmar seems to have had a piston problem on that engine..what vintage is it? Could be the fact that mechanics were trained to tell customers to run them near max rpm 3600.... I used to run mine at 3200 sometimes... sounded like an airplane! ... and both engines failed prematurely. Of course it's really only about an 18 hp (?) engine rated much higher at much higher rpm!
Are these engines sleeved? cant remember... hope so... so it can be fixed.
Bummer......
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is online now   Reply With Quote
Old 20-07-2013, 11:01   #30
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,365
Re: I was bored so pulled the head on my yanmar

Quote:
Originally Posted by Navatech View Post
Craftsman is currently selling their compression tester for $58.49 (regularly $64.99)... Harbor Freight has their basic diesel compression tester currently for $29.99...
Diesel engines usually require a screw in compression gauge to get a good reading. (you cant physically hold it tight enough) so you also need to have an adaptor machined.....
__________________

__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is online now   Reply With Quote
Reply

Tags
head, yanmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 4LH/HTE Head Gasket Replacement terrymccann Engines and Propulsion Systems 8 09-01-2012 22:32
Blown Head Gasket on Yanmar 4JH ? Conch Cruzer Engines and Propulsion Systems 11 13-11-2011 23:36
Want To Buy: Cylinder Head for Yanmar petercreese Classifieds Archive 0 06-10-2011 20:09



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:07.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.