Brad Roberts

"what's that rattle"

Tell them it is a race car :) They will go "ohh-ahh" :lol:

B

Hell, Now I'm confused as well. I probably have more miles on my car than anyone here and I've never had a rattle at all. Completely regardless of what I do with the clutch pedal.

Do you have the Aasco flywheel? Or the Fidanza? (sp?) there are 2-3 different flywheels. I can only speak about the Aasco and the 20-30 I have installed and the 20-30 cars I work on that already had them installed.

I will admit different gear lubes will increase or decrease the noise. Mobil1 = rattle with light flywheel.

As far as vibration: the Aasco flywheels are *pretty* well balanced out of the box, but not perfect~! The stock flywheel.. is WAY off, but the rubber dual mass dampens the effect.

B

Your fine. Sorry about the confusion. Push the clutch in and it the rattle does go away. The TO has a different sound.

I re-read my post and it confused me.. LOL:

When the clutch it out, the input shaft is turning the same speed as the engine, push in the clutch and it slows down and gets quieter.

B

Aasco light flywheel we *all* use :)

B

However my moneys still on the T.O.B. as this is by far the most common cause of "transmission noise".

He *just* had the engine installed with all new clutch/flywheel/TO.

To test if it is the TO: push the clutch in. The noise will go away.

In this case.. with "synchro rattle" it will get worse!! :)

B

The noise has always been there. Promise. You just don't hear it with the dual mass flywheel. The dual mass is a harmonic balancer of sorts, but primarily for the INPUT shaft of the tranny not so much the crank. The 997's have a harmonic balancer at the front of the crank and the dual mass flywheel.

B

Practice :) If you want it done right, remove the AOS and replace that oil pipe. The engine pulls a vacuum on itself. If that pipe leaks, it is essentially a vac leak and becomes unmetered air entering the intake. It is not a lot.. but it will also stress your new AOS if it is leaking.

You are good at it now. Just get some of those brackets out of the way!! make it as easy on yourself as possible!!

Something else I do: CLEAN that area before you start on it. I believe you have "Simple Green" over there :)

B

The aftermarket replica's are about 4-5lbs heavier than the stocker's This may not sound like much, but you are talking about wheels that are in the 20lb range as it is stock!!

B

Tranny noise :)

I have been running the light flywheels since the day Aasco released them (8+ years ago??) and NONE of them have caused any bearing issues. Ever.

The Tilton multi disc clutch we run makes the same noise on the same tranny's.

This is a 6speed 996 tranny. The synchro's are multi part and RATTLE when not dampened. Porsche goes to great length to make sure the cars are "dumbed" down. If I handed you a gear with synchro (covered in gearlube) you could shake it and hear the same "rattle" he is hearing from his car at idle. The gear lube we run today is nothing like what we ran in the 901's/915's/930 boxes. It is much thinner and synthetic. All this factors into the rattle he is hearing :)

Every arrow in this picture points to a synchro. Every synchro is a rattle.

B

Thanks for the update :)

I noticed a lot of people commenting about the hours.. but I'm not sure all of them noticed it was a C4 and requires a "tad" more effort :)

B

You really should have replaced that oil fill pipe. They are not expensive and the new ones are of better quality :( Much easier when the AOS is not in the way.

B

normal.. you are now hearing the tranny. No dual mass to dampen the noise :)

B

Don't kid yourself. The true value of your car is still 10k or $9500. I buy them ALL DAY LONG with less mileage and typically less headaches. Your machine oil? That will last about 100 starts or so :)

I agree they did blast you (welcome to the web) I get my pants pulled down regularly. My skin is now VERY thick :)

B

werqwer

The PET calls them "plates" POSES calls them "plates"

B

Anyone know for a fact that the 997X51 oil cooler will fit under his intake plenum? I know it is nearly double the size of the 3.4 stock cooler :)

B

We install them in ALL conversion cars and ALL BoxsterSpec cars :) Easy peasy.. figure $550 or so for every nut/bolt/screw/radiator/brackets/clips/rubber bellows :)

B

Did they keep the old DME? I'm curious as to what happened :)

B

D_A_M_N.. $80 is good! Do you mind telling us where you bought it?

B

Oh boy.. you are on the slippery slope now!! :lol: Who was your instructor? I know 99% of the people in your SD region (I ran a shop down there for several years) and AutoX'd a Boxster with them :)

B

Getting rid of the car?? :o NO WAY!! From across the pond I can walk you through 99% of anything you will ever need to do to the car. Some of it may require some special tools :) but track me down if you run across anything else!!

I have spent a lot of time out near the Elstree studio's in Herfordshire over the years :) I love the UK :)

b

I need to run down to Aase bros. today for some dyno work, but I'll be back in a couple of hours. Take your time. Be careful!

B

Ross? how many miles are on the car? If the oil filler pipe has not been replaced, I'd do it now also!

It is MUCH easier to do when the AOS is out of the car!!

Let me know what year car you have and I'll get the oil pipe part number for you :)

B

It is fine where it is :) it is just MUCH easier to move all that out of the way :)

B

996 107 023 04

They are running about $100 for them right now :)

I did a write up on another site back in Dec. :)

AOS INSTALL ON A 986S

B

THAT is CRAZY :o 36k miles?? I paid 40k for my truck!! :lol:

I was in Pasadena last night under a Porsche :)

Gotta be something up with the CarFax?? Low mileage car mostly unmolested? starting at 39k?

B