Logo
Click for Perkins manuals!
Results 1 to 6 of 6
  1. #1

    Default Water draining from radiator on perkins 4108

    Hi, bought a boat recently and had the gaskets changed and all starts etc. But now when I'm cruising the water seems to drain out at a rate of a couple of litres every couple of miles so have to stop and top up

    Was told it nees bleeding but have no knowledge of where from or how to do it. Is this information a correct diagnosis and if so does anyone know how this can be done as told there's a few possibilities?

    Thanks

  2. #2
    Join Date
    May 2015
    Location
    Oregon
    Posts
    149

    Default Re: Water draining from radiator on perkins 4108

    Are you calling the heat exchanger the radiator or do you really have a radiator? Is the 4108 in a tractor?
    Sometimes the thermostat will keep the engine from filling with water and an overheat condition exists in parts of the head or block. That can cause pressure and force water out the overflow. The solution is drill about a 1/16" hole in the thermostat plate and refill the water. But probably the head gasket is wrong or improperly installed. That's a lot of water.
    Where, exactly is the water draining from. The overflow, or some other part of the engine? Do you have a temperature gauge?

  3. #3

    Default Re: Water draining from radiator on perkins 4108

    Quote Originally Posted by Lepke View Post
    Are you calling the heat exchanger the radiator or do you really have a radiator? Is the 4108 in a tractor?
    Sometimes the thermostat will keep the engine from filling with water and an overheat condition exists in parts of the head or block. That can cause pressure and force water out the overflow. The solution is drill about a 1/16" hole in the thermostat plate and refill the water. But probably the head gasket is wrong or improperly installed. That's a lot of water.
    Where, exactly is the water draining from. The overflow, or some other part of the engine? Do you have a temperature gauge?

    Hi thanks for the reply. It has got a temperature gage. I'll check with a friend who's at the boat where the water is coming out and get back to you with the other info.

    Thanks again

  4. #4

    Default Re: Water draining from radiator on perkins 4108

    Hi been told I need to know how to bleed the engine coolant system after its filled with with water or coolant? Does anyone know where this needs to be done or how, thanks

  5. #5
    Join Date
    May 2015
    Location
    Oregon
    Posts
    149

    Default Re: Water draining from radiator on perkins 4108

    Depending the type of thermostat, it may block some, or most of the air from leaving the engine when it's filled. That's why some thermostats come with a small hole in the plate. It allows the air out, but too small to interfere with the operation of the thermostat. If your thermostat doesn't have a hole, drill one.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	thermostat with hole.jpg 
Views:	42 
Size:	37.9 KB 
ID:	24340  

  6. #6

    Default Re: Water draining from radiator on perkins 4108

    Thanks, appreciate that, I'll try it out.

Similar Threads

  1. Diesel in oil perkins 4108
    By scansler in forum Perkins
    Replies: 9
    Last Post: 09-19-2010, 11:21 AM
  2. Replies: 3
    Last Post: 04-02-2010, 09:13 PM
  3. Perkins 4108 raw water pump
    By dwmboston in forum Perkins
    Replies: 3
    Last Post: 03-22-2010, 05:20 PM
  4. Perkins 4108
    By stevejenno in forum Perkins
    Replies: 3
    Last Post: 07-28-2009, 07:36 AM
  5. Perkins 4108 50 hp speed
    By Joe Pirelli in forum Perkins
    Replies: 8
    Last Post: 01-11-2008, 07:19 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •