Cruisers Forum
 


Join CruisersForum Today

View Poll Results: Which is the Bleed Screw
The small Phillips Head Screw 4 28.57%
The larger slotted screw 6 42.86%
Both 2 14.29%
Dunno 2 14.29%
Voters: 14. You may not vote on this poll

Reply
 
Thread Tools Rate Thread Display Modes
Old 13-06-2015, 02:07   #1
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Question Which is the Bleed Screw - 2GM20 Fuel Filter

Yanmar Quiz Time.

The photo is from a 2GM20 but I sure it applies to the GM series and maybe other Yanmar series.

Vote and discuss (if you must )
Attached Thumbnails
Click image for larger version

Name:	Fuel Filter 2GM20.JPG
Views:	449
Size:	125.5 KB
ID:	103652  
__________________

__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 13-06-2015, 11:51   #2
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,815
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Officially its the small screw, that the yanmar engineers then located directly under the exhaust manifold. The bigger screw oddly will work for bleeding too. Because a good engineer always allows for a backup.
__________________

__________________
sailorchic34 is online now   Reply With Quote
Old 13-06-2015, 16:39   #3
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

145 views and only four votes...
Maybe a boring poll or maybe no one wants to use option 4

While the other low pressure bleed screws are characterized by the Phillips Heads, at the this point you get an option of a slotted head. More back up I suppose .

I have never bothered to look closely but are the screws on either side of the filter element and would it matter anyway?
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 13-06-2015, 16:43   #4
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Quote:
Originally Posted by sailorchic34 View Post
Officially its the small screw, that the yanmar engineers then located directly under the exhaust manifold. The bigger screw oddly will work for bleeding too. Because a good engineer always allows for a backup.
At least the access is good (even great) on the 2GM20 unlike say 3GM30F and presumably the 2GM20F.
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 13-06-2015, 16:45   #5
Registered User
 
RainDog's Avatar

Join Date: Jun 2009
Location: Varies
Boat: Pacific Seacraft 34 #142
Posts: 1,183
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

I always use the big one.
RainDog is offline   Reply With Quote
Old 13-06-2015, 17:00   #6
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Well the big one is slightly higher than the small one so using the big one is better in principle!

And easier to use with a socket if you are like me and prefer sockets to screwdrivers!
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 13-06-2015, 17:06   #7
Registered User

Join Date: Jul 2010
Location: Dunedin, Florida
Boat: Compac 23D
Posts: 29
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

I have a 1gm10 and the manual says the small phillips head is the proper one to use for bleeding the line.

Bobl
__________________
BobL is offline   Reply With Quote
Old 13-06-2015, 17:50   #8
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

10mm wrench fits the smaller "air bleeding bolt" as the manual calls it. It has a slot cut through the threads to help the air escape. Barely has to be loosened as a result. The nylon sealing washer will distort very easily. So don't over tighten. Good part to have in the spares box I think. Especially if you mistakenly remove the bolt entirely and drop it in the bilge like I did. Have no idea where that thing went.

The larger bolt is referred to as a "plug" in the manual diagram. No mention of it in the text that I see.

The sealing surface of the larger bolt is no higher than the bleeding bolt on my filter body.
__________________
Life begins at the waters edge.
four winds is offline   Reply With Quote
Old 13-06-2015, 17:55   #9
Senior Cruiser

Cruisers Forum Supporter

Join Date: May 2012
Location: Hailing Minny, MN
Boat: Vancouver 27
Posts: 751
Images: 1
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

What about the 2nd (or "3rd") bleed screw? Where's that little dude at, eh?
__________________
laika is offline   Reply With Quote
Old 13-06-2015, 18:19   #10
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,815
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Quote:
Originally Posted by laika View Post
What about the 2nd (or "3rd") bleed screw? Where's that little dude at, eh?
The second bleed screw is on the end of the bolt that connects the fuel line to the injector pump, which the Yanmar engineers put under the tank on the fresh water cooled gm's. Another fail....
__________________
sailorchic34 is online now   Reply With Quote
Old 13-06-2015, 18:24   #11
Senior Cruiser
 
Roy M's Avatar

Cruisers Forum Supporter

Join Date: Feb 2007
Location: Southwestern Yacht Club, San Diego, CA
Boat: Searunner 40 trimaran, WILDERNESS
Posts: 3,042
Images: 4
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

I have a long slotted screwdriver in my engine room that just fits perfectly. Both of the two screws on mine are hex, but the slotted is much larger and accessible.
Attached Thumbnails
Click image for larger version

Name:	DSC05458.jpg
Views:	454
Size:	442.7 KB
ID:	103686   Click image for larger version

Name:	DSC05457.jpg
Views:	303
Size:	443.9 KB
ID:	103688  

__________________
Roy M is offline   Reply With Quote
Old 13-06-2015, 18:27   #12
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Quote:
Originally Posted by four winds View Post
10mm wrench fits the smaller "air bleeding bolt" as the manual calls it. It has a slot cut through the threads to help the air escape. Barely has to be loosened as a result. The nylon sealing washer will distort very easily. So don't over tighten. Good part to have in the spares box I think. Especially if you mistakenly remove the bolt entirely and drop it in the bilge like I did. Have no idea where that thing went.

The larger bolt is referred to as a "plug" in the manual diagram. No mention of it in the text that I see.

The sealing surface of the larger bolt is no higher than the bleeding bolt on my filter body.
I always assumed (probably incorrectly) that the "plug" is provided as another outlet of the fuel filter - not that I can see any need for such but maybe ultilized in some rice harvester or such like in Japan.
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 13-06-2015, 18:37   #13
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Quote:
Originally Posted by Wotname View Post
I always assumed (probably incorrectly) that the "plug" is provided as another outlet of the fuel filter - not that I can see any need for such but maybe ultilized in some rice harvester or such like in Japan.
Sounds reasonable, and simply "plugged" for marine use.

My first guess was it was used during machining operations to drill the fuel pathways and then plugged. Though usually those are simple pressed in plugs or peened on ball plugs. Common on many carburetors.
__________________
Life begins at the waters edge.
four winds is offline   Reply With Quote
Old 13-06-2015, 18:51   #14
Registered User
 
bill good's Avatar

Join Date: Oct 2006
Location: Brisbane Australia
Boat: sold
Posts: 721
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Just a little side note on this over priced little bit of kit. I found both my 1GM's had banjo bolts which were too long & had always problems with getting any washer to remain sealed until they were shortned. Always had a bit of diesel showing before this mod. Even purchased new filters in the process.

Bill
__________________
bill good is offline   Reply With Quote
Old 13-06-2015, 18:57   #15
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Which is the Bleed Screw - 2GM20 Fuel Filter

Quote:
Originally Posted by bill good View Post
Just a little side note on this over priced little bit of kit. I found both my 1GM's had banjo bolts which were too long & had always problems with getting any washer to remain sealed until they were shortned. Always had a bit of diesel showing before this mod. Even purchased new filters in the process.

Bill
Curious.

Did you ever try new washers or even two washers per bolt?

I will store this snippet of info for furture consideration as I always had the faintest screen of diesel on the bottom of the filter. Not really moist or damp but always returns after awhile no matter how well cleaned off.
Thanks for the heads up.
__________________

__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Reply

Tags
2gm, 2gm20, crew, fuel, fuel filter

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
Help! Injector Pump bleed screw broke sambodean Engines and Propulsion Systems 8 09-06-2017 08:31
Which Fuel Filter Searanger50 Construction, Maintenance & Refit 52 28-06-2013 12:21
Bleed Screw - Volvo Penta D1-30 Katmando Engines and Propulsion Systems 0 19-02-2013 09:58
Changing Delphi CAV Fuel Filters Yanmar 2GM20 erasmos Engines and Propulsion Systems 7 19-08-2010 05:12
Electric Diesel bleed pump advice... Christian Van H Engines and Propulsion Systems 18 09-12-2008 05:32



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 09:52.


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.