bgoetz

Charles Navarro

We have been building up a core bank for RND the last few years.

The main failures points we see are worn guides, scored cylinders, and stretched chains. When tracked, excessive oil temperatures will slowly roast the main and rod bearings. Engines don't loose pressure as the on-demand pump makes up for increased clearances. We've seen a few oil pump sprocket failures in our shop where the engine looses oil pressure at high rpm.

Like I've said on past threads, the 9A1 is a pretty remarkable engine and kept cool and well maintained, they are very robust and can actually wear out.

swingwing

OP, if you do send in another oil sample, you'll need to advise lab of the particles you're concerned about. Standard ICP analysis (Spectroscopy) is not going to see particles larger than 5-8 microns - much smaller than visible with naked eye. You'll need to ask lab for PQ (or PQI) evaluation.
https://www.machinerylubrication.com...analysis-tests

nwGTS

Petza914

Are the black pieces plastic or metal. It's possible the tensioner paddle guide has failed and the chain is rubbing on the metal tensioner paddle itself, which is aluminum, and that's the source of metal bits you see. If so, I don't believe the guides are replaceable without disassembling the motor.

Mumbles

Tensioner may be gone this allows slap tick noise. It happened to me.

bronz

Thanks for all your input guys, really appreciate it. Its hard to say if the black specs are plastic or metal i actually didnt have time to really investigate the day i pulled the filter. I saved everything and will go back to look at it better when i get a chance. My plan is to take an oil sample and send it for analysis and see what they come up with.

What type of metal would come up in analysis if it was cylinder walls, or rod bearings, or the chain eating into the block?

I really really hope i dont need a full on rebuild but if i do I will be reaching out to you Charles and we can discuss some options.

I will keep you guys updated as soon as i find out anything.

bronz

@Mumbles How much did that run you or was it covered under warranty? Do you know how many labor hours was the job at least? Thank you

bronz

Results from the previous 2 UOAs

bronz

i already miss her ;,,,(

jeebus31

Did you cut open the oil filters from your prior oil analyses and inspect for metal flecks?

bronz

Yes never found anything at all.

Charles Navarro

Cylinders will be aluminum and silicon.

Rod or main bearings will be tin and copper.

Cam or lifter will be iron.

Feel free to PM me the UOA and I'd be happy to look at it. I've seen literally thousands of UOA reports for Porsche engines, so it's a good bet if there is something elevated, we'll get a good idea of what failed.

Charles Navarro

Nothing is jumping out to me on that last UOA you posted.

Did the engine have any ticking noises prior to the failure?

bronz

The engine did have a slight ticking sound ever since i bought it with 66k miles. But ive heard that sound on many Porsches and it sounded completely normal to me. This is probably the only video i have of the car and you can kind of hear it before i rev it up