connecting a bypass filter on turbocharger ?

[Dyxan]

Was discussing yesterday with a workshop mechanics about installing a TP-bypass filter in to a BMW 5TDS.
He sugessted why not connect it to a turbocharger oil line ? There is allready an outlet with higher oil pressure as well another one with low pressure on the turbo charger motoroil line.
There would be no need for any expensive adapters or simmiliar.
Are there any risks involved ?

thanks in advance for info

 

[LarryL]

As long as there is enough flow for both on the pressure side and same for the return line. If the oil backs up in the return line, back up into the turbo, you might not like all the smoke. One way to find out is to try it.

 

[Dyxan]

ok, let´s try it was just afraid if something cannot be damaged as the automechanician said it shall work but he has absolutely no experience with bypas filters.

Why do you think it shall smoke more than before?

thx

 

[Gary Allan]

On the turbos that I've seen, it appears that they use a larger "drain" line to the pan for return. This would be a novel way to plumb a bypass.

Dyxan, his concern is that if the discharge of the turbo and the bypass filter exceed the capacity for the return line, that, instead of the cooling/lubricating throughput of oil that you have now, ..you will have a pressurized situation that will push oil past your turbo seals and into the intake side of the compressor.

 

[Steve S]

Don't take oil from the turbo or return it to the oil return line . Oil exits the turbo kinda foamy notice how the return is larger in diameter.

 

[LarryL]

It would not be foamy if taken before the turbo, and the only thing to worry about on return is that you don't overload it and back up into the turbo. It's worth a look, especially since the biggest single drawback to a bypass filter is installing it.

 

[Dyxan]

That´s it, it would be taken before the turbo, it looks like allready prepared.
What do you mean with overloading?
Just a very small stream will be bypassed via 1/16´´orifice and wents back. Probably a back-pressure valve shall be implemented ?

I will try to find some scheme/drawings about the turbo oil line of the BMW 5TDS (1998) to post it here.....

 

[LarryL]

Don't put control valves in oil lines.

The return line has to be clean. I don't know the flow rates you will be dealing with, but if too much oil goes down that return line, the oil or foam from the turbo can backup and put pressure on seals in the turbo. I think it will only be a problem if the return line, itself, is coked up.

 

[Steve S]

quote:

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Originally posted by Dyxan:
That´s it, it would be taken before the turbo, it looks like allready prepared.
What do you mean with overloading?
Just a very small stream will be bypassed via 1/16´´orifice and wents back. Probably a back-pressure valve shall be implemented ?

I will try to find some scheme/drawings about the turbo oil line of the BMW 5TDS (1998) to post it here.....

---

I have run an Amsoil be90 bypass in my ex 1988 4 cyl Camry for a while with a swivel fitting that allowed the oil to return through the oil fill cap. The return stream was more than expected. The oil from the turbo is foamey.

 

[Dyxan]

well what if the turbo would be "bypassed" ?
What if we take the motoroil before the turbo and we return in after the turbo (of course with an 1/16´´ orifice) ? Than it will work without beeing foamey and without the need of an backpressure valve ... or not ?

 

[TP4ME]

I run a Frantz on a Toyota TD pickup. Inlet is from a sandwich adaptor and return is through an adaptor I made up and spliced into the hose portion of the turbo return line. No problems so far and the filter is certainly working well. Probably simpler just to tap the pan for the return though.