Jump to content

Mack E7 water pump bolt problems


beco822

Recommended Posts

This topic has been discussed before and unfortunately I am at a dead end.Have 2 Water pump bolts that keep breaking off I have replaced the Harmonic Balancer and have updated the bolts with the spacers per Mack’s bulletins on this problem.New fan,new Mack water pump,new Mack fan clutch,water pump housing,belt,belt tensioner,alternator.Everything on the front of this motor is new from Mack and I keep having the same issue.Any help would be much appreciated!

Link to comment
Share on other sites

When I bought my 2001 cl new it was doing that. They put 4 water pumps on and the spacer kits. Still ended up snapping bolts. I finally called enough numbers and got engineering, they asked for my opinion. I told them it should have a plastic fan instead of steel. They sent out a new plastic fan and horton clutch and water pump. Mack installed, never had an issue in a million miles. 

  • Like 2
Link to comment
Share on other sites

On ‎2‎/‎27‎/‎2018 at 9:42 PM, br549 said:

Is this a E-Tech engine or E-7? Are you using the  old pulley on the water pump?  If so try a remack w/pump with the pulley already on it.  If they are out a few thousand they will break the bolts out at high rpm.  This is on an E-Tech engine

Yes sir its an E-tech and I have had 3 different waterpumps since this started.But have been taking the pulley off and reusing it each time>

Link to comment
Share on other sites

 

On ‎2‎/‎27‎/‎2018 at 11:34 PM, Dirtymilkman said:

When I bought my 2001 cl new it was doing that. They put 4 water pumps on and the spacer kits. Still ended up snapping bolts. I finally called enough numbers and got engineering, they asked for my opinion. I told them it should have a plastic fan instead of steel. They sent out a new plastic fan and horton clutch and water pump. Mack installed, never had an issue in a million miles. 

yeah we ditched the 8 blade metal fan and replaced it with a plastic fan and still having the same issue.

Link to comment
Share on other sites

On ‎2‎/‎27‎/‎2018 at 7:51 AM, dogg rescue said:

I had this problem, but it was due to having had a bent fan clutch from a belt hopping off. How often do your bolts break? 

replaced original fan clutch with a Kit Masters and after the fourth time breaking the bolts replaced it with an original Horton and no change.Broken bolts 3 more times after the change.

Link to comment
Share on other sites

I would try a remack  water pump thru mack  ordered by the by the truck vin with the pulley already installed.  Make sure it has the same type of air fan it came with when it was made I remember some used a real thin spacer between the pulley and air fan, but it might have been a kysor air fan. Give the vin to mack  dealer a see how it came from factory.

Link to comment
Share on other sites

  • 2 weeks later...

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...