timing chain like noise centered at oil crankcase - Page 2 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Jake Raby · 08-22-2009, 06:50 PM

Quote:

Originally Posted by jbox53

No apology needed. I've dealt with this particular Porsche dealer before and have been slammed with bills and am not impressed with their service. The noise sounds serious to me and you pinged my technical conscience to urgency. You seem to have quite a following on the forum so I'll give you a try. Hey, I'm out of options at this point.
the sooner the better, tomorrow works for me if
thanks for the concern.

I know the Dealer you are referring to...

Jhandy's car is here now, he shipped it here from Texas, so people do believe in us and what we have done with these engines..

We'll treat you right, we do things the old fashioned way :-)

Jake Raby · 08-24-2009, 10:31 AM

The Boxster arrived at my facility a few minutes ago.. I just finished a piston installation procedure, so I am headed downstairs now to get it onto the lift and diagnose the sound.. I fired it up very briefly and heard the noise straight away. Now comes the fun part.

jbox53 · 08-24-2009, 11:41 AM

Quote:

Originally Posted by Jake Raby

The Boxster arrived at my facility a few minutes ago.. I just finished a piston installation procedure, so I am headed downstairs now to get it onto the lift and diagnose the sound.. I fired it up very briefly and heard the noise straight away. Now comes the fun part.

Good to hear.....or maybe not. Hopefully damage will be at minimum.
By the way, the Griffin driver was a pleasure to deal with, as you stated.
I'll keep my fingers crossed. thanks.

Jake Raby · 08-24-2009, 01:40 PM

Glad you had a good experience with the tow company, they have been towing cars for me for years...

I have a good idea the noise is the IMS bearing, but I am awaiting a second opinion from a bearing test device that we have at our disposal. If the noise isn't the IMS it may be the IMS drive chain, something that can't be remedied without a full tear down. It could also be the oil pump as it is also driven from the IMS, opposite the bearing end.

The jury is still out, I'll sleep on it and get back with you in the morning.. The good news is it hasn't had a catastrophic failure, so I can repair it.

yimmy149 · 08-24-2009, 01:53 PM

While my heart goes out to jbox's wallet, I must say, this is the most exciting thread I've seen on 986forum!

Jake Raby · 08-24-2009, 02:22 PM

I have a definitive on the root of the sound.. It's multi-faceted.

You have two things going on:

- Bad water pump bearing
- IMS bearing is beginning to go south

The water pump is the rumbling part of the sound, the IMS is the whirring sound.. I disconnected the serpentine belt after I used a stethoscope to listen to the water pump housing and hearing a rumbling sound... With that disconnected the rumble was gone but the whirring sound was more defined.

The IMS flange is leaking also.. You also have a pair of leaky cam covers and a few cracked coil packs along with at least one bad chain tensioner.

I'll go a little further in the morning, but a few hours this afternoon has proven that it's repairable.

jbox53 · 08-24-2009, 03:09 PM

Quote:

Originally Posted by Jake Raby

I have a definitive on the root of the sound.. It's multi-faceted.

You have two things going on:

- Bad water pump bearing
- IMS bearing is beginning to go south

The water pump is the rumbling part of the sound, the IMS is the whirring sound.. I disconnected the serpentine belt after I used a stethoscope to listen to the water pump housing and hearing a rumbling sound... With that disconnected the rumble was gone but the whirring sound was more defined.

The IMS flange is leaking also.. You also have a pair of leaky cam covers and a few cracked coil packs along with at least one bad chain tensioner.

I'll go a little further in the morning, but a few hours this afternoon has proven that it's repairable.

I like the prognosis so far! Good news Jake. great detective work. Yimmy, I'm glad you're excited. Hopefully you're not one of those folks that like to watch horror movies with a bag of popcorn at your side

Technically, solving a problem systematically is an engineers' dream, and Jake , you appear to be in your element. I looking forward to the end of the story.

08-24-2009, 03:23 PM

I'm really grateful we have someone like Jake on this board. When my engine died, Jake spent 30 minutes on the phone walking me thru options, and trying to get a feel for what would be best for me.

If I never said it, thanks Jake.

Quote:

Originally Posted by Jake Raby

I have a definitive on the root of the sound.. It's multi-faceted.

You have two things going on:

- Bad water pump bearing
- IMS bearing is beginning to go south

The water pump is the rumbling part of the sound, the IMS is the whirring sound.. I disconnected the serpentine belt after I used a stethoscope to listen to the water pump housing and hearing a rumbling sound... With that disconnected the rumble was gone but the whirring sound was more defined.

The IMS flange is leaking also.. You also have a pair of leaky cam covers and a few cracked coil packs along with at least one bad chain tensioner.

I'll go a little further in the morning, but a few hours this afternoon has proven that it's repairable.

jbox53 · 09-13-2009, 02:27 PM

Just to keep all up to date.
I just finished installing the engine mount onto my 80K boxster.
Here is a .jpg of the one I pulled out. Notice all the daylight. Basically nothing left of the mount. Jake again was correct (again). I'm glad I did this. With the new IMS bearing, water pump, MAF sensor and mount, my vehicle feels more responsive and smoother than ever. IMHO the bearing , clutch, and mount issues may have been robbing hp at my wheels. I also lost the start-up smoking issues I have been experiencing (not sure why). My mileage is also up since I placed the proper air in my tires.
Take a look at the mount at:

http://img182.imageshack.us/img182/6153/jbox53engmount.jpg

P.S. recommend using a deep 15mm socket when removing the mount from the chassis. Also nice to have a cool engine when doing job. I have the burns on my hand and forearm to testify.

Jake Raby · 09-13-2009, 03:26 PM

Col!! I told you that you could do it!!! saved yourself a few more bucks too!
I plan on doing a DVD overview of changing the mount, with that it'll be much simpler and less intimidating for anyone to do.

Next you need to come take my class on lifter R&R and that Box will be even better!

The 30 wt oil you were running was probably the source of the start up smoke... You no longer have 30 wt in the engine.

Glad the car and IMSR are performing better :-)

jbox53 · 09-13-2009, 06:08 PM

Quote:

Originally Posted by Jake Raby

Col!! I told you that you could do it!!! saved yourself a few more bucks too!
I plan on doing a DVD overview of changing the mount, with that it'll be much simpler and less intimidating for anyone to do.

Next you need to come take my class on lifter R&R and that Box will be even better!

The 30 wt oil you were running was probably the source of the start up smoke... You no longer have 30 wt in the engine.

Glad the car and IMSR are performing better :-)

Thanks Jake! Good info on the oil. Your mount instructions will definitely help the next poor soul that has to tackle that puppy.