91One

I had an oil change done on my '05 C4S before putting it in storage this year, and the shop found a few (2-3) tiny specs of black plastic in the filter. They brought me in back to show me, which I appreciated. I don't have pictures unfortunately, but the couple of bits I saw were very small, about the size of a pin head. Obviously this isn't good news. The shop said I should consider opening up the engine and finding out which part(s) are the culprit. Their educated guess is that it could be variocam "paddles" wearing out, but they admitted that they won't know until they properly investigate, which sounds reasonable. I am looking at $5K (CAD) or more, I am guessing closer to $7-8K.

My question is: based on people's experiences and knowing that it isn't uncommon to find small bits (very small) in the oil filter, how urgently should I look into this? The car runs great, pulls strong, no weird noises, etc. If I go ahead I will need to book the work in early spring before they get very busy. I want to do what is right but at the same time am wondering if open heart surgery might be overkill at this stage based on what was found.

Thoughts from the community would be greatly appreciated.

Happy Holidays all

DBJoe996

How many miles on your car? How frequent are your oil changes? What type of oil and what weight? For what its worth, I would monitor the situation over several oil changes and pull oil samples for analysis.

Noz1974

They are correct in saying that it probably is the variocam paddles or could be the main chain tensioner rails, not a massive problem really until you start getting CEL codes for camshaft deviation , this is when the wear on the paddles effects the camshaft timing by a certain amount 6 degrees I think , but I wouldn't do throwing thousands of dollars for that !!
You could also keep an ear out for start up rattle as this could be a sign that your timing chain tensioners need replacing, this can cause the paddle to vibrate on the chain until the oil pressure takes up the slack of the tensioner again.
Going back to the variocam paddles, I wouldn't let a shop have your pants down for like $7k as this involves just the removal of the valve covers , disconnecting the timing chain and taking out the cams , strip down of the cam assembly to replace the pads then build back up , it a relatively small job really , maybe access would involve dropping the engine which would make it a whole lot easier but I would just monitor for now, regular oil changes every six months or 5k , hope that helps and saves you worrying about it!

Bash Hat

91One

Thanks for the replies so far.

Some additional info:
- The car has 85K km (about 52K miles)
- I drive about 5-6K miles / year
- Chain tensioners were replaced and have about 10K miles on them (did RMS/IMS/clutch/flywheel at the same time)
- Replaced water pump about 5K miles ago
- I change the oil once a year, before winter storage
- Oil used is Elf Excellium 0W40
- No CELs, but have had occasional, momentary "0" oil pressure readings (happened 2 or 3 times in 2 1/2 years)
- Recently purchased OBD II scanner, but I understand it has far fewer features than Durametric. I haven't connected it to the car yet.
- No startup rattle

TechSavvySam

I was told by Flat6 Innovations to do oil changes every 5000 miles or 6 months which ever comes first. They recommend Driven Racing DT-40.

Since there's a great deal of thought that old "worn out" oil has negative affects on the IMSB, I think it's cheap insurance. Also if you are having your oil tested, you get a quicker heads-up if something changes.

91One

Given that I don't drive the car for about 6 months a year (winter) and low mileage driven, my mechanic suggested that 1 oil change every year is appropriate. I've followed his advice since purchasing the car. That said, I like the idea of changing the oil more often as an early warning system. I like to have them do it in the fall so they can also do a quick pre-storage inspection, but I'd have no problem doing the additional oil change myself.

I am not usually a "oh well, we'll see what happens" kind of guy, but in this case I also feel the shop's recommendation might be overkill. Based on what has been said so far, I understand that any related issue would develop gradually as opposed to a catastrophic failure, so it should be possible to identify signs of an impending problem through monitoring.

I appreciate the input.

TechSavvySam

OK, then my only recommendation is to move somewhere warmer

91One

One day...

dporto

Vario-Cam pads are white plastic (that turns brown from the hot oil). The black plastic is from the main chain guides...

Gretch

/\/\ As I understand it, too.

Also. At next oil change have the shop remove the oil sump cover and look more closely for bits.........

I've a 2000 C4 with 150k miles on it. no signs of "bits" in the oil filter.........last time oil was changed by the shop.

I like the car a lot and resale value is squat so I will refresh the engine perhaps in 2019, including splitting the case and replacing ALL the chain guides, and do some other maintenance things.

I think I have a wheel bearing starting to go. If the shop agrees, I will do all 4 of those too. Car is worth way more to me than I can get for it and I like it too much to drive it into the ground.

Noz1974

Dporto
The ones I used on my rebuild were light brown on the vario pads like a caramel colour and the ones on the main chains are a dark brown colour , have you seen white ones??

91One

Good idea, I will do that.

91One

The bits could have been brown vs. black. They were so small it was hard to tell. Definitely not white. Perhaps Porsche used different color parts over the years? Mine is a 2005, so one of the very last. I know the last ones were built alongside 997s... maybe that had an influence on some the parts used... pure speculation on my part though.

Noz1974

Could be main chain tensioner pads or ims pad, listen for rattle at startup , you might have a hydraulic chain tensioner on the way out causing the pad to vibrate on the chain till in fills up again possibly causing extra wear to the pads ok