Any duramax mechanics here?

[Strummer]

I have a issue with my 2008 Dmax . Got a water leak on the back side of my motor . It’s hard to see where it is coming from . I have not had a chance to really take a hard look at it . Any ideas what to look into first ?

[locolobo]

Don't know much about D'max but I had an old Dodge that had a freeze plug on the back of the head that sprung a leak. Was only about 1" between it & the firewall so had to pull the head to replace it.

[Buck hunter332]

Freeze plug I believe

[Strummer]

Any duramax mechanics here?

I’m not sure if it’s leaking fast enough to be a freeze plug . When it dries up I will do more looking around. I watched a few YouTube videos today . Looks like there is an inspection plate between the bell housing and tranny that is a common leak. It’s above the starter. So it’s possible it’s my problem .

[wickll]

On the older Dmax, I believe they are designed so if the shaft seal leaks, the water comes out further back instead of going into the oil. You might check out this link:

https://www.dieselplace.com/threads/...r-pump.709009/

[Strummer]

On the older Dmax, I believe they are designed so if the shaft seal leaks, the water comes out further back instead of going into the oil. You might check out this link:

https://www.dieselplace.com/threads/...r-pump.709009/

Mine is leaking near the back side of the motor against the firewall .

[wickll]

I believe you will probably need a water pump replaced. I believe you have some pretty good gm mechanics at City Motors in downtown Edna. You might check with them.

[Kingfisher789]

There are also heater hoses with plastic connectors that will fail on the passenger side back firewall

[Strummer]

Got it fixed . It was a coolant line to the turbo. A 10 dollar hose but a pain to change . Had to pull the egr egr cooler and the air intake to get to it .

[MacDaddy67]

Got it fixed . It was a coolant line to the turbo. A 10 dollar hose but a pain to change . Had to pull the egr egr cooler and the air intake to get to it .

The water pump replacement is a biotch....

Harmonic balancer has to come off......

1” ratchet with 4 foot extension and 32mm bolt.....it sucked...

[Strummer]

Any duramax mechanics here?

The water pump replacement is a biotch....



Harmonic balancer has to come off......



1” ratchet with 4 foot extension and 32mm bolt.....it sucked...

That don’t sound fun .

[Gerald G]

The water pump replacement is a biotch....

Harmonic balancer has to come off......

1” ratchet with 4 foot extension and 32mm bolt.....it sucked...

You ain’t joking about that! I just did mine a couple of days ago.

[Bassdeer]

Got it fixed . It was a coolant line to the turbo. A 10 dollar hose but a pain to change . Had to pull the egr egr cooler and the air intake to get to it .

Yep that's it, had the same problem on my 05 a few years back. took to a shop and they told me they would have to drop the tranny and get up there and change some kind of seal. $2500. Took it home and saw a little water on top of the motor, got in there and and did what Stummer did and found a 5 inch hose broke. Freaking shop they knew it was that hose.

[MacDaddy67]

You ain’t joking about that! I just did mine a couple of days ago.

That engineer that put that bolt behind the HB either got fired...or promoted...

I dont know which....

It was an all day job for me

[Strummer]

That engineer that put that bolt behind the HB either got fired...or promoted...



I dont know which....



It was an all day job for me

Around my job the more dumb stuff you do the higher up ya move .