Perkins 4-108 overheating - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 06-27-2006
nelsonsmoody's Avatar
Member
 
Join Date: Nov 2005
Posts: 58
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
nelsonsmoody is on a distinguished road
Perkins 4-108 overheating

Hello,

I have Perkins 4-108 vintage (89). Starts fine and plenty of power to move 42' sail boat around. The over heating starts at 2300 rpms from 180 °. to 220°. and plus, I have changed the impeller, thermostat, clean the mixing elbow and the heat exchanger. Can anyone give me some other ideas?

Many thanks in advance.

S/V LADY LENA __/)
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 06-27-2006
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Have you actually checked to see that water is flowing through the engine? If there is a blockage in the block, you may get sufficient cooling for partial operation, but not for when you exceed a certain level.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 06-27-2006
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,338
Thanks: 88
Thanked 242 Times in 233 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Do you have a inlet strainer? You didn't mention it in your list of what you've done. It may be partially plugged, also perhaps your intake is grown over or somehow plugged. You should be able to hear the normal sound of exhaust if it's properly wet. Is your FW coolant level OK? If it's low you will have troubles even if your RWC system is normal.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 06-27-2006
nelsonsmoody's Avatar
Member
 
Join Date: Nov 2005
Posts: 58
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
nelsonsmoody is on a distinguished road
Hi Faster.

Sorry but yes I did it is nice and clean and changing of thermostat top off the cooling fluid.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 06-27-2006
nelsonsmoody's Avatar
Member
 
Join Date: Nov 2005
Posts: 58
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
nelsonsmoody is on a distinguished road
Hi sailingdog
thank you for the tip I don't know how to check that but I'll research or if you any tips or know hows.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 06-27-2006
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
Check your water inlet and piping BEFORE the inlet strainer. Some years ago we had a similar problem and went through lots of $$ before finding an elbow in the inlet pipe partially blocked with kelp. This allowed enough water in to cool engine at idle but not enough when under increasing power. Hope this helps!
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 06-27-2006
nelsonsmoody's Avatar
Member
 
Join Date: Nov 2005
Posts: 58
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
nelsonsmoody is on a distinguished road
Thank you Camaraderie
I"l check it on friday.
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 06-27-2006
Junior Member
 
Join Date: Jul 2001
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Krogen38 is on a distinguished road
4-108 overheating

I was experiencing a similiar problem with my 4-108.

It turned out to be a leaking head gasket. I had already cleaned the heat exchange, the raw water strainer, changed the impeller, and the fresh water circulating pump.

The head gasket was all that was left and once replaced, the problem went away.
David
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 06-27-2006
Senior Member
 
Join Date: Jun 2004
Location: Malaysia
Posts: 314
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
haffiman37 is on a distinguished road
The most common place to have restrictions, except for clogged up heat exchanger/filter/strainer etc, is in the exhaust elbow just where the water comes out to the exhaust.
Another thing that may cause problem is that pump capacity gets reduced over the years and exhaust backpressure may start making problems.
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 06-27-2006
Junior Member
 
Join Date: Jul 2001
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Krogen38 is on a distinguished road
4-108

More information:
I had also replaced mixing elbow and thermostat, in addition to the above listed items, before replacing the head gasket
Reply With Quote Quick reply to this message 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:

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

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



All times are GMT -4. The time now is 08:02 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.