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2006 Volvo XC70 blown turbo repair symptoms

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
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2001 - 2007 XC-70
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bikerbob951
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Year and Model: 2006 XC70
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Re: Help with blown turbo repair symptoms!

Post by bikerbob951 » Mon May 15, 2017 8:08 am

So given the amount of oil these plugs have been subjected to, should I replace them? Or maybe submerge the probe in some mineral spirits and use a nylon brush to attempt to clean the electrodes? These plugs weren't cheap, I'd rather not replace unless it's necessary.

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bikerbob951
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Re: Help with blown turbo repair symptoms!

Post by bikerbob951 » Mon May 15, 2017 5:47 pm

Next update:

Removed another 10cc's of oil from IC to TB hose, took car for another drive. Almost completely back to normal now, but it'll still misfires and loses some power at around 80% engine load.

When it does, blue oil clouds are smaller now, but the engine makes a bit of a clattering sound while misfiring. I doubt it's knocking, since I'm going into a limp mode.

Any ideas on what to check? Could it be that when the remaining oil vapor is getting ingested it's causing a temporary knock? If the oil is still liquid when it gets to the cylinder, could it almost behave like hydro-lock?

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bikerbob951
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Re: 2006 Volvo XC70 blown turbo repair symptoms

Post by bikerbob951 » Tue May 23, 2017 2:32 pm

Final update:

Cleaned the TB hose one more time, removed only a few cc's of oil and residue. Removed all plugs and cleaned them with mineral spirits, and re-installed. Took the car for a good long drive with varying engine loads, all seems well now! Will still do an ECU reset procedure just to be sure.

Follow up questions:

- When I removed the oil filter cap while making the repair, I found a gold colored, glittery smear of oil in the cap housing, similar to this image, although nowhere as severe.

Image
I presume this is tiny pieces of the blown bearing from inside the old turbo, since I've never seen it before in this car. I also found some in the turbo to IC and IC to TB hoses, which have since been wiped clean. I've also done an oil change prior to driving the car after the turbo replacement. It would appear that the oil filter did it's job, but should I be concerned about long-term issues because of bearing material circulating through the engine?

jonesg
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Re: 2006 Volvo XC70 blown turbo repair symptoms

Post by jonesg » Tue May 23, 2017 4:26 pm

ooooooh, you been buying gold sparkle oil it seems.
Never got that with mine but , turbo's don't all fail the same way.
I have a junkyard 50 miles from me, I'd swap the hoses out, cheap if you can salvage yard the replacements, those hoses aren't cheap.
looks like you're out of the woods, til the next thing.

bskeels
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Re: 2006 Volvo XC70 blown turbo repair symptoms

Post by bskeels » Tue May 23, 2017 5:16 pm

I had similar issues with my 2006 XC70 at 84000, my turbo went, replaced with a used one from a local junk yard, (was out of town on a trip at the time), found that the small vacuum line that goes to the banjo bolt on the passenger side of the manifold had completely clogged up, replaced that and I was back going again. I had similar drivability issues until I found that line clogged and replaced it.
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