Exhust Turbo

[RSeymon]

Greeting one and all,



Next week I going to start to do the kdp fix,along with installing a smaller exhust housing the 16*, My question is to change out the housing do I remove the whole turbo unit or can I change out the exhust side and leave the compressior side on the truck?



Second when you split the two units are there any gaskets that need to be replaced? FSM dosent go into much detail.



TIA

 

[Greenleaf]

Some folks do the swap right there on the engine. You gotta wonder how. I suppose it could be done with a new turbo.



You will find that the turbo is held in place by the housing you are removing. Not to mention that it will be nearly welded into place by the years of rust and expansion.



No gasket to munky with at the housing to center section. . There is a gasket at the housing to manifold flange and the oil drain tube.



Hang on to that larger housing. You'll be needing that someday.



GL

 

[JLEONARD]

Remove the whole turbo. . only a few bolts, it will be MUCH easier to deal with on the bench. Make sure to mark the existing housing in relation to the center section so the new one can be "clocked" correctly.



Are you going to port the new housing? I hope the answer is yes. Might as well.



Have fun.

Jay

 

[formula]

I chose to remove the whole turbo. Had to put the exh housing in a vise and "persuade" the center section out. (some heat and a rubber mallet) You'll need a new inlet flange gasket and an oil drain tube gasket. When putting things back together, tighten the bolts that hold the exhaust housing to the center section just finger tight. Bolt the housing to the exhaust manifold. Then attach the oil drain tube, (you'll have to rotate the center section a little to get it to fit right). Finally, tighten the center section bolts, and attach the exh pipe and intake tubes.



Sean

 

[JLEONARD]

Just remember that before you re-install the oil feed line, feed a few drops of motor oil manually into the turbo (thru the oil fitting) and give the compressor wheel a few revs with your hand... ...

You don't want a dry start.

 

[tugboatphil]

I took mine completely out. I tried a mallet, but ended up using a 2lb ball peen. After a night of soaking with rust buster, I had the housing off with 8 strategically placed smacks with the hammer. And I did hit it hard enough with the first few that I was afraid that I'd crack the housing..... but I didn't.



Also, I forgot to mark the position before disassembly, so I kept the bolts slightly loose. Hooked everything up and aligned it all. Then tightened everything.



Like Scott said, don't get rid of your bigger one. I'm needing to get my exhaust temps down and will probably go back to my 18. 5.

 

[formula]

A couple more things that just came to mind



DO NOT take off the compressor housing. There is no need to do this if you're just changing the exhaust housing. Also, do not loosen the bolts that hold on the turbine wheel or the compressor wheel.



After you've got the turbo removed in one piece, the only bolts that you'll need to remove are the 4 bolts that thread into the exhaust housing. Also, note the 2 metal straps that actually hold the center section to the exh housing, make sure they go back in the same orientation (curved edge facing inwards)



Separating the center section from the exhaust housing can be interesting, as others have stated. Just take your time and be careful to remove the housing as straightly as possible so as not to bend any of the turbine blades.



Sean

 

[formula]

Well, I just went and dug out my old H1C. Here's what it looks like with the exhaust housing removed.....



#ad

 

[swankmetal]

yeah, and while you're beating on the housing don't forget to keep spinning the shaft to make sure that the housing isn't pushing on the wheel.



dave