Jump to content

Another coolant issue


Dave B

Recommended Posts

We have a 2001 e7 427 rd688s, it has very low mileage on overhaul. Everything but crank replaced. It pushes coolant when at rpm. Doesn't push at idle. Does not over heat. We replaced air compressor,stat, radiator, fan and clutch, water pump, checked all hoses. Truck runs great. Found no hydrocarbons in antifreeze. It seems like a flow issue as it doesn't pull all the antifreeze back when cooled and pushes below the temp that would open the stat. Any thoughts would would be greatly appreciated.  If I can't figure it out in going to put it on the dyno. Trying to avoid that. Thanks for any help.

Link to comment
Share on other sites

On 11/12/2008 at 10:12 PM, Gambi80 said:

I had a coolant-push problem last summer...ended up being the air-compressor head gasket being bad and pushing compressed air into the coolant. Started with being random amounts at random times, then into full blown inability to hold coolant.

Anyway, try bypassing the air compressor coolant lines when you're at idle.

 

Link to comment
Share on other sites

On 11/12/2008 at 10:12 PM, Gambi80 said:

I had a coolant-push problem last summer...ended up being the air-compressor head gasket being bad and pushing compressed air into the coolant. Started with being random amounts at random times, then into full blown inability to hold coolant.

Anyway, try bypassing the air compressor coolant lines when you're at idle.

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...