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2015.5 s60 T5 clicking/ticking noise when accelerating

144184 Views 582 Replies 117 Participants Last post by  klr142
Has anyone experience this issue? I have a 2015.5 S60 T5, when accelerating, I get this ticking/clicking noise for about a second or so. And it feels like its losing power. Usually occurs between 3k to 4K rpm. I feel like I don't get that quick torch. Any idea?
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Maybe slight engine pinging as boost comes on?
My T6 with Polestar tune and california 91 octane 'premium' has pinged
a couple times load enough I can hear it. The drivers window has
to be down, though. Typically a hot day. Has occurred pulling away from a
stop sign and making a slow right hand turn and accelerating away hard while the
car seems to be in a higher gear then you would expect (so all low RPM).
The sound is different in cars I have owned in the past in that a lot of the high
frequency sound is muffled. So it is not as 'pingy' as you might expect and
does sound more muted (probably the additional sound proofing from the
engine cover).

I've never worried about it figuring it was the tune pushing the edge along with
lower octane fuels we have here in CA (fuel also vary seasonally). I've never heard it
ping more then three times before it dials back and I've only heard it occur twice
(in the past year).
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Doesn't California have 91 octane?
Yes. That is 'premium' in California.

Brand also counts according to AAA:


"AAA was surprised to learn the extent to which detergent additives impact gasoline quality," said John Nielsen, AAA's managing director of automotive engineering and repair. He said the top brands "kept engines remarkably cleaner than other fuels we tested."
Norwegian Blue, what model year and engine do you have?
>>I was at 70% throttle and I would immediately floor it to 100% (all the way to the carpet) and the car
>>would only read 40% - 50% after the clicking despite being all the way on the pedal.

That is quite interesting. Seems like that would be what people report as reduced power.

The pedal is a request for torque and the engine management system converts the request
into a throttle position at the intake. If you did 100% throttle after you heard the pinging
sounds and the car put the throttle at 40-50%, seems like the software is detecting something
and was dialing things back (but not timing, odd). Maybe it does not normally log knocking
as cars inaudibly ping all the time and I doubt they log those since it occurs so often and is
>> Replace Piston set and Oil Trap

In entry 165 in this thread http://forums.swedespeed.com/showth...ccelerating&p=4117442&viewfull=1#post4117442:

Let me recap - the literature I've read links the engine type (high output direct injection turbocharged) and the engine oil (specifically the additives) to the LSPI phenomenon. Volvo changes the oil at 10K miles and then a whole bunch of us experience clicking when the engine is under load (i.e.: slight incline, 25-35 mph under moderate acceleration). Then some state they have broken spark plugs (including me) and one blogger indicates piston replacement - all which the literature states is an outcome of LSPI.

So I think oil in the combustion is a suspect. If you read some of the web pages on
LSPI (google search) you find things like ( from https://en.wikipedia.org/wiki/Low-speed_pre-ignition):

Potential solutions

Researchers have been unable to pinpoint a single root cause for all LSPI instances.[10] However, tests involving the use of
engine oils have shown engine oils can be formulated to prevent LSPI while maintaining the oil's basic performances.[11]

Seems there are multiple variables, here. Oil in the combustion chamber via the intake might
be one of them?
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The one thing that perplexes me, is the wait for a recall to change spark plugs. Is the spark plug in this engine something unique, that an off the shelf one wouldn't be able to address?
Historically, Volvos turbo engines have been picky about the plugs. A common post
to forums is "I replaced my plugs and now I have misfire" followed by six replies
of "only use OEM plugs" and three replies with a thumbs up :)

IPD (who has been selling Volvo aftermarket for decades) actually stopped selling any plugs other then OEM:

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