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

Reply
 
LinkBack Thread Tools Display Modes
Old 06-28-2014, 09:46 PM   #1
Registered User
 
Join Date: Mar 2014
Location: SFV
Posts: 82
Motor mount

I suspect I have a worn motor mount. My symptoms are: thump on hard acceleration and immediate release of the gas after. A thump if I don't let out the clutch extremely slowly and finally there is a creeking sound when turning. I took off the engine cover that sits behind the seats and revved the engine to see if there is a lot of play but it didn't move much. Is this not a good way to test the motor mount or do I have another issue on my hands? Thanks in advance.

818BoxsterS is offline   Reply With Quote
Old 06-28-2014, 10:12 PM   #2
Registered User
 
rdass623's Avatar
 
Join Date: Apr 2014
Location: new orleans
Posts: 249
sounds like motor mounts to me. these flat sixes are pretty well balanced as shown from the smooth idles and such, but when the driveline is engaged there will be torqueing effect which will cause engine movement unless it is well secured.
__________________
2005 Porsche Boxster S, 2000 Porsche Boxster 2.7L Base, 2000 Mazda Miata LS Supercharged, 2010 Toyota Tacoma TRD Off Road
Previous Vehicles: 2005 Ford Mustang GT, 1986 Alfa Romeo Spider, 1971 Alfa Romeo GTV, 1999 Ford Mustang
1977 Toyota Celica GT
rdass623 is offline   Reply With Quote
Old 06-28-2014, 11:45 PM   #3
Registered User
 
Spinnaker's Avatar
 
Join Date: Dec 2007
Location: Seattle
Posts: 733
Sounds like a motor mount to me also. I had the same thunk on acceleration and deceleration. The easiest way to tell if the front mount is bad, is to have someone follow you and watch the tailpipe. If it moves up and down when you accelerate, it is time for a new front mount.
__________________
2000S Ocean Blue Metallic- 116K
3X Water Pump, Clear side markers, Crios Mod, Front engine mount, Flywheel, clutch, RMS, AOS, MAF, serpentine belt, power brake vacuum line, battery, 2X CV boots, Fuel filter, Oil filler tube, 3X ignition switch, 90K service, gas cap
Spinnaker is offline   Reply With Quote
Old 07-20-2014, 11:49 AM   #4
Registered User
 
jrcui's Avatar
 
Join Date: Feb 2008
Location: Oregon
Posts: 98
My 2000 with 108k has the same clunk. Going in tomorrow to get the mount replaced.

Update... New mount in, clunk is gone, and very noticeable difference. With new bushing and install (including $75.00 to remove old bushing and press new one in) it cas around $350 total.

Last edited by jrcui; 07-22-2014 at 02:54 PM.
jrcui is offline   Reply With Quote
Old 07-24-2014, 04:32 AM   #5
Registered User
 
mikesz's Avatar
 
Join Date: Feb 2013
Location: Cranston RI
Posts: 891
Garage
I just replaced mine for no reason I had to remove the motor mount to replace the so decided to replace mount also. I did it myself for less than $150. Pedro's board and pelican have great DIY on this.
__________________
99 Porsche Boxster
mikesz is offline   Reply With Quote
Old 07-24-2014, 04:49 AM   #6
Registered User
 
kk2002s's Avatar
 
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
Garage
I replace mine (DIY) around 60k miles. I didn't have any of the harsh behavior you guys describe, just a bit of vibration at speed.
When I did pull out the old, it was torn and definitely in need of replacement. I never felt much improvement but it did need to be replaced. I suspect this is a maintenance item around each 60- 70k worth of driving
It's a cheap fix ($150 +) but a bit of PITA as a DIY only because of it's location, removing all the under panels and dealing with the cooling hoses
__________________
2002 S - old school third pedal
Seal Grey
kk2002s is offline   Reply With Quote
Old 07-24-2014, 10:23 AM   #7
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
The other dead giveaway not mentioned here:

If the mount is broken, you can see the shifter move when in gear accelerating or decelerating. The engine lifts up against the cables when the mount is broken.


B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
Brad Roberts is offline   Reply With Quote
Old 07-25-2014, 03:12 PM   #8
Registered User
 
Join Date: Mar 2014
Location: SFV
Posts: 82
Just got my motor mount replaced. It fixed all of my problems! Car feels amazing! Thanks.
818BoxsterS is offline   Reply With Quote
Old 07-25-2014, 05:31 PM   #9
Registered User
 
Ckrikos's Avatar
 
Join Date: Sep 2002
Location: Northern NJ
Posts: 633
Check the transmission mounts as well?
__________________
LB/GG/MB 02 2.7 sold
MB/GG 02 996TT
Ckrikos is offline   Reply With Quote
Old 07-25-2014, 08:00 PM   #10
Registered User
 
Join Date: Mar 2014
Location: SFV
Posts: 82
Quote:
Originally Posted by Ckrikos View Post
Check the transmission mounts as well?
Where are the tranny mounts located?

818BoxsterS 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 08:31 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