Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 03-12-2021, 17:57   #1
Registered User

Join Date: May 2021
Location: Miami, FL
Boat: 1980 Cal 39
Posts: 79
Perkins 4108 Issue

Hello out there!
I finally purchased a Cruiser after a year of searching, actually a racer cruiser (1980 CAL 39).
Naturally this old lady needs some TLC for which I have her hauled out in Port Canaveral Florida to primarily work on the bottom. The list of todos is quite extensive as you can imagine with a time constraint to get out of the Marina that Iím in. As such Iím seeking some assistance with one particular issue. The Perkins 4108 has a coolant leak which I must locate prior to motoring down the ICW to Miami in a few weeks. The metal coolant reservoir is not leaking and is actually full, however, when filling the plastic reservoir the coolant leaks out under the metal tank and I can see it trickling across the exhaust header. I tested the plastic tank and the output line and theyíre not leaking. So, what could I check beneath the metal tank for leaks? With adequate time I would investigate myself, but unfortunately with my monumental list of todos with little time I could certainly use your assistance. Thanks in advance for your assistance!
Cap Morgan is offline   Reply With Quote
Old 03-12-2021, 19:35   #2
rbk
Registered User
 
rbk's Avatar

Join Date: Feb 2016
Location: Canada
Boat: T37
Posts: 2,206
Re: Perkins 4108 Issue

Thatís an expansion or overflow tank, donít fill it. If the tank on the engine is full youíre good. The plastic tanks are added in case they overhear and boil over. Rather then making a mess of the engine and filling the cabin with coolant and smoke/ steam it goes in the overflow tank.
rbk is offline   Reply With Quote
Old 03-12-2021, 21:22   #3
Now on the Dark Side: Stink Potter.
 
CSY Man's Avatar

Join Date: Aug 2003
Location: Ft. Lauderdale
Boat: 2001 Albin 28TE.
Posts: 3,873
Images: 124
Re: Perkins 4108 Issue

Please show pictures, much easier to comment then.
The 4-108 came in several different versions.
My version did not have an expansion tank for the coolant, but rather a plastic tube from the coolant reservoir's cap flange down to the bilge area.
(I let it bottom out in a plastic bottle, like a Poor Man's Expansion Tank, to avoid a messy bilge. )
__________________
Life is sexually transmitted
CSY Man is offline   Reply With Quote
Old 04-12-2021, 06:29   #4
Registered User

Join Date: May 2021
Location: Miami, FL
Boat: 1980 Cal 39
Posts: 79
Re: Perkins 4108 Issue

Quote:
Originally Posted by rbk View Post
Thatís an expansion or overflow tank, donít fill it. If the tank on the engine is full youíre good. The plastic tanks are added in case they overhear and boil over. Rather then making a mess of the engine and filling the cabin with coolant and smoke/ steam it goes in the overflow tank.
Thanks RBK!

Want to know how silly I feel about putting water in the expansion tank?😳

BTW, Iím curious as to the normal operating temp of this engine. Is it between 160 and 180 degrees or is 180 too high?
Cap Morgan is offline   Reply With Quote
Old 04-12-2021, 06:31   #5
Registered User

Join Date: May 2021
Location: Miami, FL
Boat: 1980 Cal 39
Posts: 79
Re: Perkins 4108 Issue

Thanks for responding CSY. I think RBK solved the puzzle for me.
Cap Morgan is offline   Reply With Quote
Old 05-12-2021, 06:28   #6
Registered User

Join Date: Apr 2021
Location: Deale, MD
Boat: Moody 376
Posts: 268
Re: Perkins 4108 Issue

My 4108 also had no expansion tank, but like CSy, an old plastic one liter bottle of tonic water serves as my overflow.

Runs happily at 180
marcjsmith is offline   Reply With Quote
Old 05-12-2021, 11:54   #7
Registered User

Join Date: May 2021
Location: Miami, FL
Boat: 1980 Cal 39
Posts: 79
Re: Perkins 4108 Issue

Quote:
Originally Posted by marcjsmith View Post
My 4108 also had no expansion tank, but like CSy, an old plastic one liter bottle of tonic water serves as my overflow.

Runs happily at 180
Thanks Marc! Much appreciated.
Cap Morgan is offline   Reply With Quote
Reply

Tags
perkins

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Not starting. Battery / charging issue? Perkins 4108 Susanita Engines and Propulsion Systems 10 04-07-2019 16:22
Replacing a Perkins 4108 with Perkins type 404D-15 sleimaniam Engines and Propulsion Systems 1 28-11-2017 12:29
Perkins 4108 Coolant Prop Movement Pump MV Engines and Propulsion Systems 11 01-12-2008 23:07
Perkins 4108 seawater pump failed in St. Thomas...help avazquez Engines and Propulsion Systems 7 25-11-2007 17:07
Perkins 4108 Starting Problem avazquez Engines and Propulsion Systems 13 07-11-2007 11:20

Advertise Here


All times are GMT -7. The time now is 08:17.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.