turbo noise

tedder · **Joined:** Thu Sep 15, 2011 7:19 pm **Posts:** 137

Hey all, is it normal to hear the turbo spool up during acceleration?

papaindigo · **Posted:** Mon Nov 03, 2014 8:53 pm

Depends on your hearing. I can hear mine whistle when I first crank up but by the time the engine warms up I can no longer hear it. If you hear it all the time I'd check the air filter to turbo hose bottom just in front of the turbo for the classic oil induced split as that can increase turbo noise. In fact I'd check that location at every oil change.

tedder · **Joined:** Thu Sep 15, 2011 7:19 pm **Posts:** 137

papaindigo wrote:

Depends on your hearing. I can hear mine whistle when I first crank up but by the time the engine warms up I can no longer hear it. If you hear it all the time I'd check the air filter to turbo hose bottom just in front of the turbo for the classic oil induced split as that can increase turbo noise. In fact I'd check that location at every oil change.

Thanks, I have always heard the turbo spool up thought it was normal because I could hear it on my 95 Cummins all the time. So the hose is between the air cleaner and turbo intake?

papaindigo · **Posted:** Tue Nov 04, 2014 7:24 am

Yeh that one. The CCV drain hose runs down to a "T" in that hose and drips oil on the bottom of the hose in front of the turbo intake which causes the hose to rot eventually. Mines fine at 50K but stoutdog's was gone at like 30K. Cost ca. $60. To check from the top you have to pull the CAC hose but with some effort it can be checked from the bottom.

tedder · **Joined:** Thu Sep 15, 2011 7:19 pm **Posts:** 137

papaindigo wrote:

Yeh that one. The CCV drain hose runs down to a "T" in that hose and drips oil on the bottom of the hose in front of the turbo intake which causes the hose to rot eventually. Mines fine at 50K but stoutdog's was gone at like 30K. Cost ca. $60. To check from the top you have to pull the CAC hose but with some effort it can be checked from the bottom.

Pulled it but couldn't find any holes :?:

The wife's Bert does not make the spooling sound like mine.

Hammy713 · **Posted:** Wed Dec 10, 2014 5:10 am

Keep an eye on it and but better yet, check for play in your turbo. They are very quiet, nothing like the turbo on a Cummins. Mine started getting louder and it was bad. I replaced it and its quiet again.

Don't get me wrong, I love the sound of a turbo but only if I've done something to modify it.

Good luck.

gmctd · **Posted:** Wed Dec 10, 2014 10:28 am

K&N wire mesh type air filter allows more compressor whine than paper type

Also, badly fitting cover or broken\cracked air box

Also pin-hole in compressor-to-CAC hose

Also loose compressor scroll on cartridge

Also bad cartridge bearings (bad turbo)

SFHLibertyCRD · **Posted:** Wed Dec 10, 2014 5:33 pm

I have always had somewhat noticeable turbo whine under boost (definitely noticeable when cold). I have a new airbox to turbo hose and everything seems fine. Turbo impeller has zero play. Thanks for the list above. I'll check out some of those things as well.

Would bad bearings have other symptoms besides the sound?

gmctd · **Posted:** Wed Dec 10, 2014 7:37 pm

It starts with vibration\chatter and reduced rpm and lower BOOST - worst-case is chewed compressor wheel and scroll, chewed turbine wheel (scroll is cast-iron), soon lots of black oil in the compressor and turbine

turbo noise

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