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turbo leaking boost??

 
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Old 22 Apr 2016, 08:26 pm
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Default turbo leaking boost??

hello everyone i recently got a 2003 pt cruiser gt and have had issues with it only boosting 8psi. i boost leak tested it and it isn't bubbling anywhere at all when i spray soapy water. every time i boost leak test it, it only builds up to 10 psi and drops down really fast. i can hear the leak loudly coming from the turbo area. i inspected the lower intercooler pipe that runs off the bottom of the turbo and nothing is cracked or torn. i sprayed soapy water everywhere imaginable and there is nothing indicating a leak on the outside. so i pulled the turbo off the car and pressure tested it with everything capped off. it leaks pressure out of the oil feed and drain holes. i blocked those off and then it will leak the pressure out of the exhaust turbine side. if i push on the exhaust turbine you can hear the air make different sounds so i know thats where its leaking. i don't know if this is normal with the turbo off the car so if anyone knows can you please help me and thanks a ton!
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Old 23 Apr 2016, 10:56 am
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Default Re: turbo leaking boost??

WELCOME TO THE FORUM


The boost psi and how you describe it for your year PT Cruiser is about correct.
Although you may have other parts needing attention I would not expect much more boost then what you are getting without a PCM calibration change.
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Last edited by NitroPT; 23 Apr 2016 at 11:04 am.
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Old 23 Apr 2016, 11:04 am
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Default Re: turbo leaking boost??

This is my 2005 GT PT Cruiser. It is not totally stock however there are only a couple of power enhancing items added to it. You can watch the boost and how it reacts.

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Old 23 Apr 2016, 11:08 am
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Default Re: turbo leaking boost??

This is a Turbo Charger I rebuilt for a member on this forum.

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Old 28 Apr 2016, 01:42 pm
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Default Re: turbo leaking boost??

Thank you NITRO for the information and help as well. i still have yet to locate where I'm losing boost. I've tried everything that i could possibly think of. it build up to 6 psi on ht boost leak test and quickly falls down from there within ten seconds to zero. i can hear a leak and it sounds like it coming from somewhere near the turbo but i can't locate the leak.
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Old 28 Apr 2016, 01:48 pm
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Old 29 Apr 2016, 07:06 pm
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Default Re: turbo leaking boost??

thank you for the response. I already have a boost leak tester that i made and it works great! just cannot locate the leak. its coming from the turbo area. i replaced the turbo and everything,checked all lines and everything. i have a dip tune and only hit 9-10 lbs at best only in 3rd gear and up. 1st gear is about 4-5 psi and 2nd is 6-7 psi
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