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Old 05-26-2019, 09:45 PM   #1 (permalink)
RatsMC
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Banks Turbo Rebuild?

The one thing on my truck that I haven't replaced or repaired is the Banks Turbo. I just went on a 700 miles round trip and about 200 miles in, the turbo started whining if there was any boost. If you are familiar with the Banks set up, you know they are pretty quiet so this had me worried.

My first thought was maybe it wasn't getting oil so I disconnected the feed line and started the motor which quickly shot oil about 20 feet across the gas station so oil pressure wasn't my problem.

So, I babied it the rest of the trip (which is a lot of fun when you are climbing over a 7500 foot pass through the Sierras) and I am back home now. I figure the turbo needs to rebuilt. The first thing I find is that Banks doesn't seem to sell rebuild kits so I started investigating. As far as I can tell, it is a Mitsubishi T04B turbo and there are tons of rebuild kits available on Ebay (https://www.ebay.com/i/183730493390?chn=ps).

My question is, has anyone rebuilt one of these? Anything I should be looking our for?

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82 GMC K1500 6.2l

Banks Sidewinder Turbo
TH400 Transmission
Rebuilt 10 Bolt 3.42 Diffs
NP208
Electric Lift Pump relocated to the frame
Manual Glow Plug Set up

Last edited by OkDually; 06-02-2019 at 09:02 PM. Reason: title adj
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Old 05-26-2019, 11:25 PM   #2 (permalink)
legendman
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Here's a old thread that might have useful info


https://www.dieselplace.com/forum/63...ebuilding.html

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What your saying happened, should never be able to happen.
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I put a chevrolet tailgate on my last truck and it started acting like a girl...love me, need me, want me pay attention to me. Took it off and put the GMC back on (fixed the latch) and it went back to being the same old dirty bastard it used to be
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Old 05-27-2019, 02:07 AM   #3 (permalink)
ABINIDI
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Here is what I used on my Banks Turbo, its stamped with Rotomaster on the housing and is AR 60.

https://www.ebay.com/itm/GARRETT-T3-...-/312017697206

Gasket Kit:

https://www.ebay.com/itm/Banks-Gaske...kAAOSwCV5cas0P
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Old 05-27-2019, 03:08 AM   #4 (permalink)
RatsMC
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Thanks a lot. All info seems to point to that one rebuild kit.

Now, I just need to get the bolts holding the turbo on the manifold to come loose.
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82 GMC K1500 6.2l

Banks Sidewinder Turbo
TH400 Transmission
Rebuilt 10 Bolt 3.42 Diffs
NP208
Electric Lift Pump relocated to the frame
Manual Glow Plug Set up
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Old 05-27-2019, 06:37 PM   #5 (permalink)
ABINIDI
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I ended up taking the passenger inner fender well off when I rebuilt mine, only takes about 20 mins and much easier to get to all the turbo stuff with it off.
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Old 06-02-2019, 02:45 AM   #6 (permalink)
RatsMC
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Got the rebuild kit and managed to get the nuts off the manifold after a lot of swearing.

Now, I need to get the wheel shroud out of the exhaust housing and can't seem to figure out how. I'm sure it just needs a little encouragement but I am not sure what I can put force on to do that.
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jerry

82 GMC K1500 6.2l

Banks Sidewinder Turbo
TH400 Transmission
Rebuilt 10 Bolt 3.42 Diffs
NP208
Electric Lift Pump relocated to the frame
Manual Glow Plug Set up
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Old 06-02-2019, 08:59 PM   #7 (permalink)
RatsMC
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The spelling error in the title is going to drive me nuts.

Anyway, a little heat got the wheel shroud off. Lots of crud and crap in there took me forever to clean up.

Started putting it back together and realized that the turbine end piston ring was completely missing from the old shaft. This is probably the reason for all the carbon crud. Of course, this is a part that isn't in the rebuild kit so I am trying to track down a new one.
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jerry

82 GMC K1500 6.2l

Banks Sidewinder Turbo
TH400 Transmission
Rebuilt 10 Bolt 3.42 Diffs
NP208
Electric Lift Pump relocated to the frame
Manual Glow Plug Set up
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Old 06-02-2019, 09:03 PM   #8 (permalink)
OkDually
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Quote:
Originally Posted by RatsMC View Post
The spelling error in the title is going to drive me nuts..
I went back and adjusted the title for you
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Old 06-03-2019, 01:27 PM   #9 (permalink)
RatsMC
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Thanks a lot!

Also, I found the piston ring so it is going back together. Good thing to. The one I found on Ebay is $16 which is stupid but then I noticed they want $26 for shipping! For a half inch ring clip. I hate ebay.
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jerry

82 GMC K1500 6.2l

Banks Sidewinder Turbo
TH400 Transmission
Rebuilt 10 Bolt 3.42 Diffs
NP208
Electric Lift Pump relocated to the frame
Manual Glow Plug Set up
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Old 06-12-2019, 03:16 AM   #10 (permalink)
RatsMC
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Well. Turbo rebuilt and back in...

But it is still whining. Maybe not as loud as just before the rebuild but definitely louder than it was a couple months ago.

So...did I just screw things up? The rebuild was pretty simple and I can't imagine how you could do it wrong.

If there is something wrong with this turbo, what are the options? From what I can tell a Banks replacement is worth as much as my truck. Is there something else I could put on there?

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jerry

82 GMC K1500 6.2l

Banks Sidewinder Turbo
TH400 Transmission
Rebuilt 10 Bolt 3.42 Diffs
NP208
Electric Lift Pump relocated to the frame
Manual Glow Plug Set up
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