Mercruiser 470 Overheating

Reply

  #1  
Old 07-05-00, 01:42 PM
Visiting Guest
Posts: n/a
Post

I have a Mercruiser 470 that is running hot. Have changed the thermostat, installed new sea water pump impeller, removed and cleaned heat exchanger and checked all hoses for obstructions and other damage. Cooling water flow appears sufficient and engine runs good. Runs about 190 at idle and will get to 225 quickly under throttle. HELP?
 
Sponsored Links
  #2  
Old 07-05-00, 08:38 PM
Visiting Guest
Posts: n/a
Post

You should look to the exhaust elbow for obstruction first. It will plug up with rust and scale reducing the water flow.
Next will be to check for the head gasket leaking combustion into the coolant.
Is it losing coolant, bubbling out the cap?
are there any leaks at the camshaft seal/water pump?
coolant dripping from the weep hole at the front right side of the block?
scott
 
Reply

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


Thread Tools
Search this Thread
Display Modes