buzzing engine noise. Help!

[heiwaz]

Originally Posted by jcb986

Get a stethoscope from the auto store, remove the belt and listen for the sound around the crankshaft seal and listen to the timing chains. How many miles the Box.

it has got around 90000 miles.
Now I'm changin the IMS bearing, so the chain are loose, how can I check it? should I check the chain tensioner, too?

[extanker]

pull the oil sump and cut open your oil filter....tell us what colors you find and the size of the stuff

[heiwaz]

Originally Posted by extanker

pull the oil sump and cut open your oil filter....tell us what colors you find and the size of the stuff

sorry I don't undestand very well you what you want to tell me. can you explain me? do you want to open de oil filter to see what color is? I emptied the oil, but I've got the old oil keep in a bottle.

Sorry but my english sometimes is not perfect. thanks.

[extanker]

do you know anyone in your area that knows engines made by PO that can help you ?

[heiwaz]

I usually posted in my country porsche forum, but nobody know what the noise come from. I posted in this forum because I know there is a lot of boxster experts.

I guess I need to open the oil sump to see what colour is inside, it's ok?

I will try to open the sump an take a photo.

[Steve Tinker]

heiwaz,
extanker was refering to opening up your old oil filter (cut the ends off), unfolding the paper element and inspecting to see if there are any metal or plastic particles lodged in the element.
Metal could = IMS bearing wearing.
Black plastic could = IMS bearing plastic shield breaking up.
Red / brown plastic could = chain tensioner guide wear.
If you do find any of the above, the next sensible step is to remove the bottom of the sump to see just how much debris is in there. These results will give you some idea on how to procede next...
Hope this helps - your English is far better than my Spanish too....

[heiwaz]

thank you very much Steve Tinker, this help me a lot. Now, I've got the IMS bearing cover removed, so I can see the bearing plastic shield and it's in perfect condition. I will open the oil filter to see any plastic or metal particles. Thanks!