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

Post Reply
 
LinkBack Thread Tools Display Modes
Old 09-21-2020, 07:06 PM   #1
Registered User
 
skucera's Avatar
 
Join Date: Jun 2020
Location: Harrisburg, Oregon
Posts: 5
Garage
Qingdao, I like your solution. I'm going to have to rummage around my local scrapyard to see if I can find a couple of those for my car. Both of my windows started to not drop last week when the smoke was at its worst. I'm a little tired of pushing my window down that quarter inch before closing my door with the top up.

Thanks,
Scott
__________________
==============
2002 986 Boxster S
6-speed
skucera is offline   Reply With Quote
Old 09-21-2020, 11:16 PM   #2
Registered User
 
Join Date: Sep 2017
Location: SF Bay Area
Posts: 113
Garage
No more vibrations @ 3000rpm

Replaced spark plugs, new spark plug tubes, installed new HT coil packs, and did an oil and filter change. Now she purrs with no rumble at at 3000 rpm. Hopefully the oil leak goes away too with the new spark plug tubes. Will find out tomorrow morning, to see if there is a spot on the floor at the right side by the tire.
Steelepuls is online now   Reply With Quote
Old 09-22-2020, 10:40 AM   #3
Registered User
 
Join Date: Jul 2019
Location: Finland
Posts: 351
Quote:
Originally Posted by Steelepuls View Post
Replaced spark plugs, new spark plug tubes, installed new HT coil packs, and did an oil and filter change. Now she purrs with no rumble at at 3000 rpm. Hopefully the oil leak goes away too with the new spark plug tubes. Will find out tomorrow morning, to see if there is a spot on the floor at the right side by the tire.
Hmmm... I still have the light rumble on 3000rpm after fixing the vibrations on the same rpm by swapping engine and transmission mounts.
Also, have changed the plugs, plug tubes, oil & filter, but not the coils. Could it be that the coilpacks would be reason for my car's rumble?
Car is 2001 2.7 Boxster.
__________________
2001 996 C2 Manual
pilot4fn is online now   Reply With Quote
Old 09-22-2020, 12:50 PM   #4
Racer Boy
 
Racer Boy's Avatar
 
Join Date: Sep 2015
Location: Seattle, WA
Posts: 946
Quote:
Originally Posted by pilot4fn View Post
Hmmm... I still have the light rumble on 3000rpm after fixing the vibrations on the same rpm by swapping engine and transmission mounts.
Also, have changed the plugs, plug tubes, oil & filter, but not the coils. Could it be that the coilpacks would be reason for my car's rumble?
Car is 2001 2.7 Boxster.
These cars make a rumbling sound right at 3,000 rpm, due to a resonance in the engine. Mine does it, but I only hear it while in the lower gears where the road noise is lower.
Racer Boy is offline   Reply With Quote
Old 09-22-2020, 08:24 PM   #5
Registered User
 
Join Date: Jul 2019
Location: Finland
Posts: 351
Quote:
Originally Posted by Racer Boy View Post
These cars make a rumbling sound right at 3,000 rpm, due to a resonance in the engine. Mine does it, but I only hear it while in the lower gears where the road noise is lower.
Sounds like exactly what is with my car has. Light rumble but it's annoying, since speeds I drive here is fairly much on close to 3000rpm. I'd like to think that Porsche cars would run smooth thru out the rpm - at least my two previous ones were (1986 944 and 1985 Carrera 3.2).

Quote:
Originally Posted by Steelepuls View Post
Pilot4fn, The coil packs can definitely be one of the causes. My car is a 2001 S with 106000 miles, I did everything you have done as well. I got help from this forum, the guys here know their stuff. Coil packs are one of the items that was highly recommended to fix this problem. I've only put in about 50 miles since doing this service, but from what I noticed, the rumble is gone. Also, the Pelican site says to change the spark plugs every 10000 miles, so if you've got more than that on plugs you currently have, I would change both of them at the same time. Your already in there, so why not. I had over 20k miles on the plugs and when I took them out, the tips were almost gone. LOL. Good Luck.
I changed the plugs approx 5000miles ago and the current plugs condition is very good. Car runs awesome besides the light rumbele at 3000rpm.

Quote:
Originally Posted by Qingdao View Post
Piolet4fn: do you have any CELs? Do you have any pending CELs?
No CEL's of any kind of, not even pending ones. I have Durametric and that can't find any issues - at least so far.

Also, regardless of the weather (dry and sunny, humid, misty, heavy rain, etc.) car runs real well. My understanding is that if coilspacks are going bad, most of the time it would be related to cracks on the coilpacks and cause problems especially on the wet weather driving conditions.
__________________
2001 996 C2 Manual
pilot4fn is online now   Reply With Quote
Old 09-22-2020, 10:29 PM   #6
Registered User
 
Join Date: Jun 2014
Location: LB, Germany
Posts: 1,515
Quote:
Originally Posted by pilot4fn View Post
Car runs awesome besides the light rumbele at 3000rpm
Do you mean the exhaust resonance at around 3.000 rpm or are there real vibrations somwhere in the cabin or stearing or somewhere else noticable?

What engine mounts did you use? The original Porsche front mounts have a new design. This mount might cause the problem with vibrations in my car. But my vibrations are in every rpm range.
__________________
My Porsche keyfob, instrument cluster and alarm ecu repair service: https://sportwagendoktor.de
Smallblock454 is offline   Reply With Quote
Old 09-23-2020, 08:57 AM   #7
Registered User
 
Join Date: Jul 2019
Location: Finland
Posts: 351
Quote:
Originally Posted by Smallblock454 View Post
Do you mean the exhaust resonance at around 3.000 rpm or are there real vibrations somwhere in the cabin or stearing or somewhere else noticable?

What engine mounts did you use? The original Porsche front mounts have a new design. This mount might cause the problem with vibrations in my car. But my vibrations are in every rpm range.
The rumble is evident especially when I lift the gas above 3000rpm for lowering the car speed - the at 3000rpm it shows up. Only very seldom it is so strong that I could call it a shaking, but it is not on the steering only. It's rather on the car body, so I'd expect it to came from engine since the speed of the car has nothing to do with it - happens with every gear at same rpm.

Ordered the engina mount from design911uk and it says on the receipt that "This product supersedes Porsche's old part numbers: 98737502304"

Transmission mounts are branded 'Rein' that has been commented to be a good choice on few of the Porsche forums I read.
__________________
2001 996 C2 Manual
pilot4fn is online now   Reply With Quote
Old 09-23-2020, 07:41 AM   #8
Registered User
 
Join Date: Sep 2017
Location: SF Bay Area
Posts: 113
Garage
Quote:
Originally Posted by Racer Boy View Post
These cars make a rumbling sound right at 3,000 rpm, due to a resonance in the engine. Mine does it, but I only hear it while in the lower gears where the road noise is lower.
After driving it a little more yesterday, the rumble may still be there, especially when I downshift to lower gears, it is noticeably less rumbling than before though.
Steelepuls is online now   Reply With Quote
Old 09-24-2020, 12:00 PM   #9
Registered User
 
Join Date: Mar 2014
Location: So Cal
Posts: 300
Garage
Quote:
Originally Posted by Racer Boy View Post
These cars make a rumbling sound right at 3,000 rpm, due to a resonance in the engine. Mine does it, but I only hear it while in the lower gears where the road noise is lower.
I want a rumble at anything above 3000rpm! If I don't get that growl or famous boxer motor rumble something is wrong.

The motor and exhaust noise is what makes these cars notoriously fun, stop worrying and just drive it!
mgfranz is offline   Reply With Quote
Old 09-22-2020, 02:58 PM   #10
Registered User
 
Join Date: Sep 2017
Location: SF Bay Area
Posts: 113
Garage
Quote:
Originally Posted by pilot4fn View Post
Hmmm... I still have the light rumble on 3000rpm after fixing the vibrations on the same rpm by swapping engine and transmission mounts.
Also, have changed the plugs, plug tubes, oil & filter, but not the coils. Could it be that the coilpacks would be reason for my car's rumble?
Car is 2001 2.7 Boxster.
Pilot4fn, The coil packs can definitely be one of the causes. My car is a 2001 S with 106000 miles, I did everything you have done as well. I got help from this forum, the guys here know their stuff. Coil packs are one of the items that was highly recommended to fix this problem. I've only put in about 50 miles since doing this service, but from what I noticed, the rumble is gone. Also, the Pelican site says to change the spark plugs every 10000 miles, so if you've got more than that on plugs you currently have, I would change both of them at the same time. Your already in there, so why not. I had over 20k miles on the plugs and when I took them out, the tips were almost gone. I replaced the coil packs about 8k miles ago with a set my friend gave me, he said they were only about 30k on them. I think the combination of not changing the spark plugs and using old coil packs may have been my issue. I'm not gonna mess around with used ignition parts anymore. LOL. Good Luck.
Steelepuls is online now   Reply With Quote
Old 09-22-2020, 04:18 PM   #11
Registered User
 
piper6909's Avatar
 
Join Date: Jan 2019
Location: PA
Posts: 1,726
Quote:
Originally Posted by Steelepuls View Post
... Also, the Pelican site says to change the spark plugs every 10000 miles...
Seriously? 10K?? I get well over 100K on my Chrysler and Subaru spark plugs!
__________________
2002 Boxster Base - Arctic Silver - Tiptronic
2010 Subaru Forester
1980 Ford C-8000 Custom Cab Emergency-One Fire Truck
__________________
"I never lose. I either win or I learn." -Nelson Mandela
piper6909 is offline   Reply With Quote
Old 09-22-2020, 06:52 PM   #12
Registered User
 
Qingdao's Avatar
 
Join Date: Jul 2019
Location: Charleston
Posts: 541
Quote:
Originally Posted by piper6909 View Post
Seriously? 10K?? I get well over 100K on my Chrysler and Subaru spark plugs!
psh lightweights.

I do about 5 k on my RX7; then I torch them and brush off the carbon build up.


Piolet4fn: do you have any CELs? Do you have any pending CELs?
__________________
'99 supercharged 4.3 chevy Boxsterado
'98 PP13B powered "RX986"

This hairdresser only cuts mullets
Qingdao is online now   Reply With Quote
Post Reply



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 11:30 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page