I bought this on Ebay ebay holset turbo . I hope it is a 12cm wastegated WH1C. Can anyone tell me for sure what I purchased? Here is the info from the tag:

Assy. 3533316
Serial 02711218
Customer 3802599-00-09/3
Model WH1C

Thanks,

Duke

1992 W250 stock

 

Judging from the e-bay ad, photos, and the info you stated from the ID tag it is a WH1C and has a internal waste gate.
If you run that Assy# number by a Cummins dealer they might be able to tell you the exh housing size. It is common for the exh housing size to be cast into the housing. Otherwise just measure it and figure out the cm2
(3.1416 X the radius squared in inches) X 2.54 = sq. cm.

 

I don't have it in front of me yet. I called my local Cummins dealer and they claim they can't tell me what size the housing is. Guess I'll find out for sure when it shows up. I'm crossing my fingers that I got a good deal and not an expensive paper weight.

 

if it's the original hosing(holset) then it should say right on it what size it is, my 18.5 did!

 

Is the t4 flange bigger than ours? Is ours a t3?

 

Well I found out this turbo is for a Cummins 6BTA engine wich is a 5.9l diesel so that makes me feel a little better. I will look at the exhaust housing for the size once I recieve the turbo but I was hoping to find out sooner. I hate waiting.

 

I don't think they used T4 flanges on any HX35's/WH1C's! At least I've never seen them on those turbos...especially with wastegated housings!

You should be fine, they never had any wastegated housings bigger than 16cm...that I know of. So it should be way better than what you're used to regardless

I'll still bet it's a 12cm!!
Chris

 

Well I’m staring at my new turbo and it is as advertised. I still can't believe I got such a good deal. I'm not sure what I’m looking at but the only number I can find on the back of the exhaust housing is the number 15. Can someone tell me if I’m looking at the right number? Here is a link to the pictures:

turbo

I can't wait to get this thing on my truck!

 

Im sure that you got a 12cm housing, but from everything i have seen, most all turbo housings will tell what size the housing is right in the inlet of the exhaust side on one of the 4 sides on each side of the divider. You may have to take a wire brush and clean it up, but id say its a 12cm. Its hard to explain, but just look down into where it bolts to the manifold with a light, and it should be close to the flange, and just simply have a 12, 14, 16, 18.5, etc engraved in the housing. Good luck

Eric

 

It's barely legible but there is a 5 - 12 in the inlet.

Thanks! I can't wait until I can get this installed! I will be installing a pyrometer and a boost gauge at the same time. Going to fix the kdp and install a new lift pump as well. I haven’t been this excited since I turbocharged my minivan!

 

We use a t03 flange, those import guys have all the turbo answers

 

WOW! I didn't know you could get a 4" exhaust flange! That's a 12 cm2 housing for sure. You got a great price on that one.

You should take off the exhaust flange and drill through the center divider through the WG hole to get better flow for the front 3 cylinders. Otherwise if you add more fuel, and I'm sure you will, you'll have EGT problems on the front 3 cylinders and you'll have overspeeding problems on the turbo.

Edwin