Noz Posted April 6, 2021 Share Posted April 6, 2021 So, I still have yet to check my logs. May do this weekend (got some work to complete before Thursday so bit rushed until then). But with a rebuilt turbo, I'm thinking prevention is better than cure. I'm going to assess the turbo return line, maybe increase the diameter of the piping and fitting to eliminate any restrictions there. As I did only have an issue during missing a gear and bouncing off the rev limiter so any weak points hopefully won't be achieved but better safe than sorry. If I install a turbo feed regulator such as one of these bad boys; https://www.driftworks.com/turbosmart-oprt40-oil-pressure-regulator-black.html?gclid=CjwKCAjwjbCDBhAwEiwAiudBy59r-jz7doNaKQ7rSHa36jlUcPIqdC21p7Ts0obQPXlpEczXQaE8hxoCYTsQAvD_BwE If the oil return was blocked or wasn't flowing sufficiently (even at regulated inlet oil pressure), how would that affect the turbo oil pressure. I feel like it's obvious and I'm just being a bit dumb here. And yes, I know I need to check the logs to try and understand why the seals went. I'll do it, pinky promise. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 6, 2021 Share Posted April 6, 2021 If the return is big enough and the system clean enough it should never block, my brother had a smoking issue on a new turbo once, turns out there was a piece of plastic wrapping stuck in the drain, causing enough back pressure to leak past the seals once pressure built up. The PRV in the oil pump should be sufficient to manage oil pressure throughout the system, the only thing that controls the pressure in the turbo is the size of the restrictor (in a ball bearing turbo), BB turbos require less oil pressure than a journal bearing turbo. Providing you have the right size restrictor and the right size drain gasket, you will have no issues. Quote Link to comment Share on other sites More sharing options...
Noz Posted April 7, 2021 Author Share Posted April 7, 2021 Never used a restrictor on the ball bearing turbo I have. I could just fit a restrictor fitting instead then perhaps. Think ill check the drain pipe for certain after hearing that story! Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 7, 2021 Share Posted April 7, 2021 Thats your problem, you NEED a restrictor in the oil feed to a BB turbo Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 7, 2021 Share Posted April 7, 2021 Also is the drain mounted vertically, is the path back to the sump a straight a line as possible etc etc. Some more reading for you :- https://www.precisionturbo.net/tech/PDFs/PTE-turbocharger-install-recommendations.pdf Quote Link to comment Share on other sites More sharing options...
Noz Posted April 7, 2021 Author Share Posted April 7, 2021 Yes mate. As straight as I can get it. Will grab some pics when I get it back on the ramp for a service, pre MOT. Quote Link to comment Share on other sites More sharing options...
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