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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old January 12th, 2019, 22:50   #1
relumalutan
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Default Squeal after replacing turbo

2006 BRM, upgraded turbo to brand new GTB1749V from Darkside Developments, also deleted EGR, installed a EGR block plate with EGT port:
https://www.idparts.com/exhaust-turb...rt-p-3070.html (used J-B weld High heat to make sure there is no leak on the EGT port when I have installed the EGT probe, also had to make some minor adjustments with a drill bit to the two mounting holes in the plate to align them with the turbo mounting studs, no J-B weld on them).
I have also installed a used 3" downpipe, I have noticed that the I have a small exhaust leak where the downpipe connects to the turbo (the downpipe flange has a small crack from the previous owner). I did not think too much about it, since it is after the turbo, and I will fix the leak tomorrow. As soon as I started the engine I got a squealing noise, if I remove the vacuum line to turbo the squealing stops. The turbo oil feed line is installed, all the hoses are in good order, new turbo gasket installed, turbo nuts torqued correctly. See the two videos I have recorded and let me know what you think:
https://www.youtube.com/watch?v=aQZ0...ature=youtu.be
https://www.youtube.com/watch?v=Hx8v...ature=youtu.be
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Old January 12th, 2019, 23:23   #2
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That sounds to me like the turbo isn't getting sufficient oil flow. Did you use a new supply line?
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Old January 13th, 2019, 00:00   #3
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Yes, the turbo came with a new braided oil feed line. I have removed the old stainless steel feed line and replaced it with the braided one:
https://www.darksidedevelopments.co....o-upgrade.html
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Old January 13th, 2019, 01:42   #4
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I'd check the braided supply hose carefully for any kinks. Your video sounded like metal on metal contact, probably best not to run it anymore until you can examine the lubrication situation.
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Old January 13th, 2019, 10:16   #5
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Almost sounds like a leak to me. Like a pin hole squeel.
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Old January 13th, 2019, 13:54   #6
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Quote:
Originally Posted by Yourbuddysatin View Post
Almost sounds like a leak to me. Like a pin hole squeel.
You mean like a boost leak?
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Old January 13th, 2019, 13:56   #7
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Quote:
Originally Posted by turbobrick240 View Post
I'd check the braided supply hose carefully for any kinks. Your video sounded like metal on metal contact, probably best not to run it anymore until you can examine the lubrication situation.
Double checked the braided oil feed line, there are no obstructions. I guess the next step will be to disconnect the oil feed line at the turbo and turn on briefly the engine to see if any oil comes out the feed line.
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Old January 13th, 2019, 13:59   #8
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Could be a boost leak. Try spraying some soapy water around the connections and look for bubbles.
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Old January 13th, 2019, 17:42   #9
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I was saying exhaust leak at the turbo but maybe a boost leak too. Or vacuum. Can’t rule everything out til it’s all checked.
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Old January 14th, 2019, 23:54   #10
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As above really, i do hope you did replace exhaust manifold to turbo gaskets, there is the leak potential. I would also make sure all bolts are nipped up as a loose bolt will cause uneven clamping pressure and favorise leaks...
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Old January 15th, 2019, 05:11   #11
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I think it sounds like you have a leak. I changed out my turbo last year and forgot to tighten two of the egr bolts, they were just finger tight, started it up and what a noise, worse than your video.
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Old January 15th, 2019, 07:17   #12
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I hope you guys are right and it is indeed a leak. I have used a new exhaust manifold to turbo gasket (came with the turbo). I'll recheck everything in the weekend.
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Old January 20th, 2019, 08:58   #13
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I had that exact same squeal. It was the EGR block off plate and gasket. The plate was bought from some vendor on here that was aluminum. It had different thermal properties than steel and ended up bending just enough to allow the steel gasket to act like a reed. You know, like a saxophone or clarinet reed. One of your gaskets is making that noise. My bet is your EGR delete gasket on the turbo.
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Old January 20th, 2019, 16:10   #14
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Quote:
Originally Posted by MTB_TDI View Post
I had that exact same squeal. It was the EGR block off plate and gasket. The plate was bought from some vendor on here that was aluminum. It had different thermal properties than steel and ended up bending just enough to allow the steel gasket to act like a reed. You know, like a saxophone or clarinet reed. One of your gaskets is making that noise. My bet is your EGR delete gasket on the turbo.
Thanks for the advice. I didn't have a chance to check on the car, as I have it 40 miles away in a friend's barn, but when I"ll get to it, that will be the first thing I'll do.
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Old February 2nd, 2019, 20:35   #15
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Fixed the issue: it was the EGR block plate leaking exhaust. Replaced the gasket and plate , all is good now.
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