Down Pipe Integral to Turbo

[rbattelle]

I called a local dealer parts department today to inquire about purchasing a new turbo down-pipe (the one that clamps directly to the turbo... where an exhaust brake goes). I was told it's part of the turbo, and you can't get the pipe unless you buy the turbo.



BTW, the reason I was looking for one was for insurance in case I screw up my EGT gauge install!

 

[Big MAK]

The turbo is definitely not part of the down pipe. Your parts guy's been sucking some sort of pipe too long! You were right; the down pipe clamps to the turbo.

 

[David Muench]

Mark's right of course, but I think rbattelle is actually talking about the cast elbow between the turbo and the down pipe.



That piece is removable (isn't it? Can't say that I've looked on my 03, but it was before of course), but I can picture it being sold as part of the turbo from the dealer.



Maybe you could buy one off of someone here who has installed an exhaust brake.

 

[rbattelle]

Dave is right, I meant the cast pipe clamped directly to the back of the turbo. Maybe my calling this the "down pipe" is inaccurate?

 

[rfcom]

Coincidence

I am doing the exact same thing as rbatelle and was also told by the dealer that they show it as part of the turbo. It must be, because he quoted the ridiculous price of $1050. Even the stealer wouldn't charge that much for a cast elbow. I'm just gonna drill it and if it gets buggered, it's time for an exhaust brake.



Jim

 

[David Muench]

The down pipe is the chunk of exhaust tubing that connects from that elbow down to where the exhaust system starts going horizontally under the truck.



I don't know the proper name for the elbow, I just usually call it the cast elbow on the back of the turbo.

 

[KLockliear]

You'll want the pyro probe in the exhaust manifold anyway.

 

[KHaeckler]

Pyro Placement

Keith (or anyone else)

Where, exactly, do I tap the manifold for my probe??? I've got my gauges but am too chicken to do it until I'm sure. Thanks.



Karl

 

[rbattelle]

Choice of thermocouple placement depends upon what you're attempting to monitor. Which, in my opinion, depends on the extent you intend to bomb.

 

[Mark_Kendrick]

Keith is right...

I can't believe I just said that:



Put the pyro in the area just above the flange (on the exhaust manifold)



The temperature drop across the turbo changes with rpm, power and the duration of the heat exposure.



The only way to find out what's going on in the engine is to measure pre-turbo.



FWIW,

Mark

 

[KLockliear]

Re: Keith is right...

Originally posted by Mark_Kendrick

I can't believe I just said that:

Oh My Gosh, write this date down.



Just above the mounting flange, about 1. 5-2 inches, that's where you want it.

 

[KHaeckler]

Thanks for the good info... I can't wait to finish this install!!!

Karl

 

[dgieson]

The instructions with my gauge say, center the probe in the back half of the manifold 1. 5 to 2" above the flange. Seems there is a web in the middle of the manifold.



Dave



Check out this thread.



https://www.turbodieselregister.com/forums/showthread.php?threadid=65740&highlight=pyro

 

[Prairie Dog]

I read a while back where one of our members drilled and tapped for the pyro w/o removing his turbo. Just used grease and a little luck. I've always removed the turbo. Have I been wasting my time? Has anybody else done this successfully?

 

[Vaughn MacKenzie]

I drlled the manifold on my current truck without removing the turbo. Used some grease. Didn't hurt it one bit. While I've heard of a lot of people doing it this way, I've never heard of it contributing to a turbo failure.



Vaughn

 

[Big MAK]

Lot's of us have tapped the exhaust manifolds w/o a problem. Use some grease and sweep inside the tapped hole with a magnet to pick up anything that gets away. Haven't tapped my '03 yet; but did my 98. 5 twice (replaced one manifold for another problem not related to the pyro) and my 95 once. Never lost a turbo.

 

[Snow man]

You want pre turbo,like others have said. Dont remove the turbo,it isnt necessary,even if you dont get all the chips they will blow right past the exhaust wheel of the turbo on startup. That turbo wheel isnt fragile enough to be hurt by a few chips blowign by them at startup. Remember the turbo will barley be moving by the time chips go by. Ive never had a problem with a turbo(knock on wood),and iv tapped about 10 of them.

 

[BillGotthelf]

Ditto Snowmans words-except I use anti-sieze. It seems to bind up the tapped pieces of metal better than grease and it works better for all metals.