Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 02-08-2011, 07:01 PM   #1
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
strange noise from front of motor at around 2800 rpm

2001 boxster S
this afternoon started to hear a rateling noise from the front of the motor when i drive. it is not there at idle but begins to resonate a fast clatering, rateling sound when i reach 2800 rpm and gets louder to about 3500 rpm. if i rev the motor i can hear it right behind me, always at the same rpm. what the hell can that be i parked it until i can work on it. tried to insert a mp3 recording of the sound but i can't figure out how

poorsche1 is offline   Reply With Quote
Old 02-08-2011, 07:58 PM   #2
Registered User
 
Join Date: Mar 2007
Location: Ohio
Posts: 1,681
I'm no expert, but...motor mount possible? Read the descriptions and see if they fit:

http://www.pedrosgarage.com/Site_3/Install_Front_Engine_Mount.html

http://www.pelicanparts.com/techarticles/Boxster_Tech/10-ENGINE-Engine_Mounts/10-ENGINE-Engine_Mounts.htm

...or do a Search here.
Frodo is offline   Reply With Quote
Old 02-08-2011, 08:20 PM   #3
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
thanks for helping, but there is no vibration just a sickening schreechy clattering sound that starts around 2800rpm.
poorsche1 is offline   Reply With Quote
Old 02-08-2011, 09:16 PM   #4
Engine Surgeon
 
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,424
Water Pump bearings.
Idler bearings.

Pull the serpentine belt, fire it up and see if it goes away, if so its a sub-system. if not, its internal and you should call me and DO NOT run it any longer :-)
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
Jake Raby is offline   Reply With Quote
Old 02-09-2011, 04:02 AM   #5
Registered User
 
Join Date: Mar 2007
Location: Ohio
Posts: 1,681
There ya go. I'd probably go with Jake's response...he knows a little more than me when it comes to Boxster repairs.

In any case, that's a pretty easy diagnostic to do. Let us know what happens.
Frodo is offline   Reply With Quote
Old 02-09-2011, 04:49 AM   #6
Registered User
 
Join Date: Nov 2007
Location: Chicago suburbs
Posts: 1,675
"Tick, Tick...BOOM"

I'd definitely listen to Jake's advice...
__________________
JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
jmatta is offline   Reply With Quote
Old 02-09-2011, 04:15 PM   #7
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
tic tic boom huh. thanks for your optemistic support well i got in from work and took the belt off, started it and wassss veerry glad to hear nothing so i guess it must be one of the attachments. although there was a small tick tick tick coming from the pasenger side of the motor i don't know if that is something normal. just glad to not hear the clattering sound from inside the motor.
poorsche1 is offline   Reply With Quote
Old 02-09-2011, 04:48 PM   #8
Registered User
 
Join Date: Oct 2008
Location: Waco, Texas
Posts: 378
The ticking noise can be either the valves

making some noise which to some degrees is normal or sometimes the injectors make a clicking sound each time they fire.
papasmurf is offline   Reply With Quote
Old 02-09-2011, 06:16 PM   #9
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
is the alternator pulley supposed to engage one way and disengage clockwise?
poorsche1 is offline   Reply With Quote
Old 02-10-2011, 11:29 AM   #10
ddb
www.klisstle.com
 
ddb's Avatar
 
Join Date: Sep 2004
Location: Charlotte, NC
Posts: 926
Garage
poorsche1,

If your car has a manual transmission it has an alternator pulley clutch that rotates freely in one direction only. You shouldn't try to rotate it in the other direction because it could cause damage.

A while back I experienced an odd noise that turned out to be my alternator clutch pulley going bad. It happened right after I installed a new water pump and a whole bunch of other parts so I already had my access panel off. It was rather easy to hear that the noise was coming from my alternator.

I would describe the noise differently from your description, but that doesn't mean it isn't the same problem. In my case it was obvious from idle. If you've ever heard an automobile AC compressor cycling on and off frequently due to low freon, my clutch pulley noise was similar.

Here is a thread I started when I experienced my problem.

Best of luck,

ddb

http://www.986forum.com/forums/showthread.php?t=21779
ddb is offline   Reply With Quote
Old 02-10-2011, 06:57 PM   #11
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
looked up your thread, you are right not the same sound, but what is crazy is that i bought the alternator tool you have pictured at a swap meet for 5 bucks a while ago. when i bought it i didnt know what it was for and the guy i bought it from didn't know what it was for either, i bought it because it looked cool. when i saw the pic i went to my toolbox and sure enough there it was. hope i never have to use it.
well as for the brokster, all the pulleys, spin fine, sound ok, and no play to speak of, but i did notice that the AC pulley when i try to twist it up and down does have slight movement which i am not sure if it is normal. i bought a mechanic stethescope and will put belt on tomorrow and try to hear where noise is from.
poorsche1 is offline   Reply With Quote
Old 02-12-2011, 02:32 PM   #12
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
not good news today, i spent almost an hour and a half trying to single out a pulley by spraying WD 40 and listening with a stethoscope but couldn't single out a pulley. i finally pulled off the belt to try one last time with no belt and i heard it. at 3000 rpm you hear a clattering sound at 3000 rpm. the other night with the belt off i didn't hear it but today heard plain as day with the belt off wondering if it can be a collapsed lifter or a chain tensioner or a chain guide broken. I already changed the ims bearing about 2000 miles ago to the LN Engineering ims bearing. at that time the rear main seal sprung a big leak so while changing that i decided to change the intermediate shaft bearing, glad i did because it had already lost all its grease and the balls looked scored and it didn't spin smoothly at all. the motor has 42000 miles on it. now what?
poorsche1 is offline   Reply With Quote
Old 02-12-2011, 04:31 PM   #13
Registered User
 
Join Date: Jul 2004
Location: Houston, Texas
Posts: 7,240
If I were you I'd call Jake. He'll give you the best advice on this forum.
__________________
'97 Boxster (Black Hole for 42,000 Dead Presidents and counting) - 122k
New motor, transmission, suspension, and on and on and on it goes...
RandallNeighbour is offline   Reply With Quote
Old 02-12-2011, 07:12 PM   #14
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
ENGINE CLATTER
FINALLY FIGURED OUT HOW TO UPLOAD A VIDEO. you can barely hear the clatter on the video it is more a clatter.to me it sounds more like loose chains clattering. can the tensioner break or get weak and let the chain smack the case at a certain rpm? can the chain guides break? or is there something else that will make a clattering sound like that?
poorsche1 is offline   Reply With Quote
Old 02-28-2011, 10:54 AM   #15
Registered User
 
jdiba's Avatar
 
Join Date: Jan 2009
Location: Boston
Posts: 187
Poorsche1, you find out what the issue was yet ??
jdiba is offline   Reply With Quote
Old 02-28-2011, 07:58 PM   #16
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
been slow working on her due to time cosuming work project. but have managed to do the following so far
removed the belt to make sure it was not one of the pulleys-- noise was still there at 3000rpm
drained the oil--found nothing
cut the oil filter apart -- found a few really small pieces of brown plastic ( about 1/16" in diameter)
dropped the oil pan to see if larger pieces in bottom-- found nothing

put it back together put car on trailer and took it to a porsche mechanic friend of mine to hear the noise. he sais it is ims bearing or a bad tensioner.

about 2000 miles ago i replaced the ims bearing with a LN Engineering bearing and do not think it could have gone bad. so i will purchase the tensioners and swap them as soon as i can get a break in my schedule. will keep you posted
poorsche1 is offline   Reply With Quote
Old 02-28-2011, 08:16 PM   #17
Registered User
 
Join Date: Jan 2010
Location: houston, Texas
Posts: 17
here is a pic of the pieces of plastic i found in the filter and a sacrilegeous but easy way i found to work on my cars. whats 2500 lbs to a 15000 fork lift?
i will post if the tensioners remedy the clatering noise
Attached Images
   
poorsche1 is offline   Reply With Quote
Old 02-28-2011, 09:55 PM   #18
Registered User
 
Join Date: Jan 2007
Location: BC
Posts: 1,263
Those brown plastic bits look like what I and many others also find in their filters. Probably chain tensioner plastic. It'll be interesting to see what sort of condition yours are in if you replace them.
__________________
2001 Boxster, 5 spd, Seal Grey
clickman is offline   Reply With Quote
Old 03-01-2011, 09:25 AM   #19
Registered User
 
jdiba's Avatar
 
Join Date: Jan 2009
Location: Boston
Posts: 187
I Want One Of Those #%*@ Forklifts !! :)

That think is awesome ! LOL. Think about how much easier all our lives would be
as Boxster owners if they came with one of THOSE !
jdiba is offline   Reply With Quote
Old 04-14-2011, 06:24 PM   #20
Registered User
 
Join Date: Jun 2010
Location: spain
Posts: 69
Quote:
Originally Posted by poorsche1
here is a pic of the pieces of plastic i found in the filter and a sacrilegeous but easy way i found to work on my cars. whats 2500 lbs to a 15000 fork lift?
i will post if the tensioners remedy the clatering noise
The pieces of plastic maybe come from gasket, if they are soft, are gasket parts.

Did you found the problem of the noise?

heiwaz is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 09:03 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page