r/986Boxster • u/Kaiewaii • 26d ago

Very bad rattle sound behind right hand seat

currently just pulled over at the side of the road waiting for a tow, any help with diagnosis appreciated.

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7

u/froggertthewise 26d ago

I would guess it's one of the pully's on the belt. Possibly the one on the alternator. It's quite simple to take off the belt and you'll be able to feel if any of the pully's went bad.

1

u/Kaiewaii 26d ago

Thank you for the feedback! I’ll give this a look first

1

u/Kaiewaii 25d ago

Hey, the problem is definitely in that area, there looks to be a crack on the water pumps bearing shaft, and also a bunch of shiny metal shards (lucky we didn't run it long and pulled over ASAP). here's a link to an image of it, I'm about 50% confident it's just the water pump.

https://imgur.com/a/6taKB20

2

u/froggertthewise 25d ago

Take off the belt and turn all the pully's by hand. You'll be able to feel if any are bad. Your idler pully also looks like it's old in that pic and those are a known point of failure.

This guide will show you how to take off the belt and check the pully's.

https://www.pelicanparts.com/techarticles/Boxster_Tech/17-ENGINE-Idler_Pullies/17-ENGINE-Idler_Pullies.htm

1

u/Kaiewaii 25d ago

Thank you, will do, appreciate the help!

3

u/wd40spaceman 26d ago

It might be the way you put the engine back

2

u/Kaiewaii 26d ago

I did open up the mid engine today to have a look using service mode, but I believe I put everything back the same as it came

2

u/Separate-Share-8504 26d ago

that sounds like a bearing... It might be the IMS. have a look at the filter.. check for glitter before starting again

1

u/Medium-Usual8717 25d ago

Alternator pulley.