Do I have a 3.4 or 3.6?

[camores]

I was just under my car to get ready to do the mod exhaust called MK1. This is the mod you do on a 3.4L. When I looked at my muffler it has the accordian (flex) pipe that is associated with the 3.6L. I assumed that because I have a MY99 that my car would have the 3.4L mufflers. Do I have a 3.6L or a 3.4L? Could anyone tell me.

Thanks

[SNaray8442]

3.4

[Chuck Jones]

If you have the accordian outlet pipe on your muffler, then you've got the 3.6L muffler....the 3.4L is smooth for both the inlet and outlet pipes....Do a search on Rennlist under Modding the mufflers.....or any terminology that includes Muffler mods, and you'll see pictures of both the 3.4 and the 3.6 mufflers and be able to see the difference. There's a lot written up on this subject with pictures of the entire process.

[Duch]

I was wondering, I am going to look at a 99 996, and the owner (dealer) states that it has a 3.6L engine. I thought the 99 only came with the 3.4, or am I wrong? The dealer has expirience with porsche's, and sells only high end cars, carrera GT, MC12 ect.

[SNaray8442]

The 3.6L was introduced in 2002.

[Duch]

Also, the car has 9200 miles on it. Being a 99, Would it be easier to expect that it will have an RMS Problem?

[camores]

Thanks for all the answers. I had assumed that I had a 3.4 till I went under the car to do the MK1 mod to the mufflers. I had in hand the SS tubing for the MK1 Mod. When I saw the accodian piece I was caught by suprise. I hear the MK2 mod sounds better so I will be doing that mod instead.

How can you tell if you have a 3.4 or a 3.6 by visual inspection? I bought my MY99 with 35,000 miles, what if, the previous owner had a catastrophic engine failure and the engine was switched out with the 3.6? I just did and oil change and filled with Mobil 1 but used only 8.25 qts as the dip stick was telling me that was enough. Does any one know how to visually inspect for a 3.6?

Thanks

[Loren]

Thanks for all the answers. I had assumed that I had a 3.4 till I went under the car to do the MK1 mod to the mufflers. I had in hand the SS tubing for the MK1 Mod. When I saw the accodian piece I was caught by suprise. I hear the MK2 mod sounds better so I will be doing that mod instead.

How can you tell if you have a 3.4 or a 3.6 by visual inspection? I bought my MY99 with 35,000 miles, what if, the previous owner had a catastrophic engine failure and the engine was switched out with the 3.6? I just did and oil change and filled with Mobil 1 but used only 8.25 qts as the dip stick was telling me that was enough. Does any one know how to visually inspect for a 3.6?

Thanks

If it is a model 99 and Porsche ever changed out the engine - then it is a 3.4 liter.

Changing to a 3.6 requires several wiring changes and you must also change the DME. I doubt someone went to all that trouble.

The accordion outlet pipe style was also used on the factory Porsche Sport Exhaust - so it does not mean you have a 3.6 liter engine.

Any 3.4 liter can use 3.6 liter mufflers -- but not the other way around (i.e. a 3.6 can not use 3.4 mufflers).

So, if you car has accordion outlet pipes then either it has a PSE or has a 3.6 muffler.

[camores]

Thanks for that info. I will asume that they were just switched out to the 3.6 cans and make the appropriate MKII mod.

Last question. If I am a contributing member how come it does not show up that I am one?

[Loren]

Thanks for that info. I will asume that they were just switched out to the 3.6 cans and make the appropriate MKII mod.

Last question. If I am a contributing member how come it does not show up that I am one?

Sorry, I have no record of a contribution from you. Could you please PM me with your PayPal email address, the date of your donation, etc.

[camores]

Sorry to beat this horse to death but could you guys take a look at my 3.6? cans. Most of the 3.6 cans that I see seem a little different from mine. I know I have the tell tale accordian, but where most people are cutting into the can for the outlet bypass tube on the MKII exhuast mod, mine is like a raised nipple. So do I have 3.4 or 3.6 cans? Thanks for the help.

camores

Thanks for that info. I will asume that they were just switched out to the 3.6 cans and make the appropriate MKII mod.

Last question. If I am a contributing member how come it does not show up that I am one?

Sorry, I have no record of a contribution from you. Could you please PM me with your PayPal email address, the date of your donation, etc.

[Loren]

Get me the part number off of one of the mufflers and I will tell you for sure.

[camores]

part numbers are 996 111 132.51 and 996 111 131.51

Thanks for the help

On another topic. Can I make a donation for someone who is not a contributing member and make them a contributing member? Djomlas did some nice photoshop work for me "gratis" and maybe I can pay him back. I think other people are asking him for his services. Maybe he could do it for contributions to the site.

Camores

Get me the part number off of one of the mufflers and I will tell you for sure.

[Loren]

Very early 3.4 mufflers.

Yes, you can donate for someone else.

Just send me a PM with his/her user name after you donate.

[slbates]

I had the same mufflers on my 99 3.4 as shown in your picture. If they have a lot of miles on them, I would not modify them. Mine suffered an internal failure and were replaced with GHL's. Try to find a low mile set of 3.6 mufflers in lieu of modifying those, remember they are 10 years old now.

[camores]

The car only has 35k miles. What kind of internal failure did it have?

I had the same mufflers on my 99 3.4 as shown in your picture. If they have a lot of miles on them, I would not modify them. Mine suffered an internal failure and were replaced with GHL's. Try to find a low mile set of 3.6 mufflers in lieu of modifying those, remember they are 10 years old now.

[slbates]

The car only has 35k miles. What kind of internal failure did it have?

I had the same mufflers on my 99 3.4 as shown in your picture. If they have a lot of miles on them, I would not modify them. Mine suffered an internal failure and were replaced with GHL's. Try to find a low mile set of 3.6 mufflers in lieu of modifying those, remember they are 10 years old now.

I didn’t cut the cans open but I suspect an internal weld broke. The muffler developed a horrible rattle. Although your mufflers have considerably less miles them, they are still 10 years old.

[camores]

I decided to mod the current 3.4 mufflers and they sound fantastic. Excellent sound when on the throttle and no droning. Sounds just as good as my MY95. Cost for the tubing from Classic Tube $31.72 and the labor for welding $60.

I went with the MK1 mod on the 3.4 mufflers instead of after market exhaust not only because of the price but I heard people who switched back to stock or the MK1 mod because of droning. If I suffer an internal failure then I guess I have to find a solution. As of now I have spent basically nothing for a great sound.

Thanks for all the support in helping me do this modification.

Also thanks for running a great site as I got the info on how to place my car on jackstands on here as well. Though I did not need to take all the tires off, I had them painted black at the same time as the muffler mod. It was much easier to install the mufflers after they were modified with the wheels off. Lastly I also got the Ft lbs I needed to tighten my wheels up to, 96lbs.

RennTech.org, a great resource for those that care about their Porsche.