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Too much blowby or bad ATT turbo boot?

WarWagon

WarWagon

Well it hits on 7 of 8...
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Way too much oil being blown around under the hood from the orange turbo tube on my ATT. Engine has a little more blowby than I would like, but I have had worse.

100_3062.jpg100_3063.jpg
 
boy, that's strange... are you sure it's coming from the turbo boot? If you have oil leaking there, I'd bet you have a boost leak, too...
 
I had a leak on my 95's upper intake manifold and it didnt make near that bad of a mess, I am gonna go with pin hole in supply line being blown by the fan.
 
I get the same thing, I can't get a good seal on the boot on the turbo side. It is slightly smaller OD than the gm-x. I need to get a smaller clamp.
 
This is a 6.2 so the oil supply line comes from the rear and is behind the airflow of the oil mess. That is a good point, I'll check the valve cover for an oil leak being thrown by the fan. I am not going to be happy if this is from the blowby with as much as I have in this engine swap.
 
Just my two cents but with the oil sprayed across only the front of the boot/hose, I would suspect something other than the CDR feed to the turbo intake.
When I didn't get a good seal on the hose, the oil leaked down and around the turbo and or the intake plenum, not the front of the boot. There doesn't seem to be an external leak on the CDR hose as it is clean until you get to the CDR where the blow back is. I know this doesn't point out the source of the oil spray but it may help eliminate a couple of areas.
As a side note, for hose clamps, I use T bolt clamps from EVCO house of hoses.
 
Let me know what you find out:

http://i293.photobucket.com/albums/mm50/BigThres/1309661747.jpg

1309661747.jpg


To me, looks like a leak at the CDR to Turbo boot connection. I don't know how to address other than tightening clamps?????
 
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Get rid of that f'n CDR. Quit forcing your engine to burn it's own oil vapor.

The new turbo is sucking even more oil through the CDR and then forcing it out of the 'boot' under boost.

I'd put money on it that the intake tract is soaked.
 
Same thing happened with my ATT hose, Im not a fan of that thin silicone. It tore where I tried tightening it down a lot on the turbo. You can do two hump couplers with a 2.5" piece of pipe to connect them. And use good T-bolt clamps, not worm ring ones. You can find 3/4" wide T-bolt clamps and silicone intake pieces low priced at siliconeintakes website.

And the oil is coming from the CDR, I personally like what AK did with his "CDR experiment", to make it work like its supposed to. Its intent is to prevent too much vacuum but it does a poor job.
 
Haven't driven enough miles to confirm but it seems to have cut my oil consumption by somewhere between 1/3 -1/2. Should know some more by the end of the summer as I will be driving it alot more for work.
 
if you look closely at WWs pics his hoses and firewall have oil all over them. more than should come from weeping boot. Big Ts look more like weeping
 
buddy said:
And the oil is coming from the CDR, I personally like what AK did with his "CDR experiment", to make it work like its supposed to. Its intent is to prevent too much vacuum but it does a poor job.
Click to expand...

I'm dealing with similar oil problems. Can someone point me in the right direction to read up on what AK did?

Don
 
ak diesel driver said:
if you look closely at WWs pics his hoses and firewall have oil all over them. more than should come from weeping boot. Big Ts look more like weeping
Click to expand...

Great, I've got weeping boot syndrome. Help me out with a solution. Haven't bee that active on here because everything has been running good.

I have been experiencing problems with my K47 air box. The stock bolt that holds it to the fender well broke through the base of the box. That allowed the box to settle against the exhaust side of the ATT and melted part of it. I repaire the melt zone by screwind down a piece of plastic cobbed from the lid of a storage tub (pics to come). I somewhat solved the hold down problem with a bigger thru bolt and washer. However, the box rocks still and it pops off the cold air connection to the fender well and I've found it popped off the boot to the turbo yesterday after my drive up to Big Bear towing a trailer with a crate of slate flagstone.

BTW on that tow the truck ('99) performed quite well. Base elevation is about 1500' and peak elevation is about 7100'. During the worst stretch the temp was hitting a tick over 210 at about 35 mph. I was laying off based on the EGTs. It quickly dropped to 187 on level sections. The '99 has the stock steel 9 blade fan and I was wondering whether the Dmax composite fan might cut some temp off the high end?
 
Here is the solution, a couple 4-ply hump hoses and 2.5" piece of pipe inbetween, or even just a part of the section that you cut off the intake. And 4 good t-bolt clamps. The cheapest I could find all these parts was at siliconeintakes.com

Eddzed used double hump hoses on his

This picture is from WalkingJDesigns site
ATT_hump_hoses.jpg
 
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