Davez134
Member
Sorry for the lengthy post..Last November I replaced my turbos with the Garrett Powermax turbos from Full Race. 1-because my truck hit 100k and ESP was up, and 2- because I was hearing a rattle sound from the driver's side turbo (or so I thought). I got a new long block under warranty at 82k and a new transmission at 90K. Well aside from a couple small emission issues that I figured out the truck has been running strong. Over the past few months it would go into limp mode and thgrow the wrench light at what seemed to be random intervals. I would turn the truck off, restart and all would be good. This started to become more frequent over the last month. I have been trying my best to figure it out. I have a scanner (not just a code reader) and wasnt throwing any codes, powertrain or transmission. I did a full tune up since truck has 100k on it. Plugs/coils, throttle body, got new MAP and IAT sensors. The rattle sound was still there, even after replacing the turbos, thought maybe IWE but no vacuum leaks in the system anywhere.
Well 2 weeks ago I finally got a pending code when the wrench light came on. P0299 underboost. Looked at all clamps, tight. BOV seal doesn't have any tears, intercooler is solid, no damage, holds pressure when tested off the truck. I found pretty bad exhaust leak from the manifolds at the rear on both sides with studs missing/snapped off. I feel stupid because when I looked at the pictures I took when I did the turbos, the stud was missing then. I just never thought to look for that! Watching videos of exhaust leaks, thats what the sound is and I'm pretty sure its contributing to the underboost code. I am seeing dips in boost pressure under partial throttle at freeway speeds when capturing data with me scanner. I'm guessing it happened shortly after they put the slightly warped manifolds back on my new long block?
Anyway, time to upgrade! I got the Formline manifolds with new gaskets and Inconel studs from Full Race. Got the Turbosmart BOV to see if I like it, if not its a 15 minute swap back to stock. All new orings and gaskets for the oil/coolant lines. I will post some pictures of the process as soon as I get going. Luckily it looks like only 2 studs are gone at the rear of both sides and I can easily get my mig welder in there to extract them. Planning on starting tomorrow.
Picture I took right after removing stock turbo with exhaust stud snapped/gone. the lower one is gone now too.
Well 2 weeks ago I finally got a pending code when the wrench light came on. P0299 underboost. Looked at all clamps, tight. BOV seal doesn't have any tears, intercooler is solid, no damage, holds pressure when tested off the truck. I found pretty bad exhaust leak from the manifolds at the rear on both sides with studs missing/snapped off. I feel stupid because when I looked at the pictures I took when I did the turbos, the stud was missing then. I just never thought to look for that! Watching videos of exhaust leaks, thats what the sound is and I'm pretty sure its contributing to the underboost code. I am seeing dips in boost pressure under partial throttle at freeway speeds when capturing data with me scanner. I'm guessing it happened shortly after they put the slightly warped manifolds back on my new long block?
Anyway, time to upgrade! I got the Formline manifolds with new gaskets and Inconel studs from Full Race. Got the Turbosmart BOV to see if I like it, if not its a 15 minute swap back to stock. All new orings and gaskets for the oil/coolant lines. I will post some pictures of the process as soon as I get going. Luckily it looks like only 2 studs are gone at the rear of both sides and I can easily get my mig welder in there to extract them. Planning on starting tomorrow.
Picture I took right after removing stock turbo with exhaust stud snapped/gone. the lower one is gone now too.
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