Rattling Noise Only at low rpm when transmission is in gear

[dennis]

OK. It seems unanimous- engine mount, leading to exhaust noise. Just a few questions: will this cause damage to drivetrain and how difficult is it to replace the mount? Should I replace all? Assuming I should.

[dennis]

Can anyone recommend the best mount to buy? I have seen Wevo and Pedro's mount, but what is best as far as long lasting durability?

[yimmy149]

It's usually only the front mount that needs to be replaced. It's not super difficult, just time consuming. You have to support the weight of the engine while you are doing it, so you need a jack that doesn't leak down, or an engine support bar. If you go the support bar route, it's helpful to have a second person to help install it, and adjust it while you are under the car. I tried to do it myself and dented my fender.

I have Pedro's Enthusiast mount. I think a lot of it depends on whether you want the car to be a smoother quieter daily driver, or more aggressive. You can feel engine vibration through the seat with Pedro's mount around 3,000 rpm. The stock Porsche mount is quieter, but probably won't last as long.

-james

[dennis]

Thnaks for the help here...I really appreciate it. I'll post back when I have it all fixed.

[Bladecutter]

Originally Posted by dennis

OK. It seems unanimous- engine mount, leading to exhaust noise. Just a few questions: will this cause damage to drivetrain and how difficult is it to replace the mount? Should I replace all? Assuming I should.

I don't think its unanimous.

You should check one more thing, however, before you start spending money.

The muffler has a bracket that mounts to the rear of the transmission.
On my car, the three bolts that support the bracket and muffler are all broken.
When the engine is at the right rpms, these bolts start to rattle, and make one heck of a racket. This rpm point is usually a fast idle speed, so right around 1k rpms.

Take a look.

BC.

[dennis]

do you hear the rattle in gear only? Mine is only in gear, which makes me think its due to the engine torquing

[Matt Fredrikson]

Mines also rattles in gear on the gas only, 2800 rpm in gears 12&3 everytime o the number?? Gonna beat on the heat shield this weekend.

[dennis]

Yep same problem. I ordered a new mount- the 987 mount. I am going to replace it. It has 34k miles and its a 2001 so im thinking due to low use mount rubber dry rotted??

[tuanle16]

holy crap. i thought i was reading my own post. 02 non s boxster having same exact issue. about to buy a muffler, but now that i see your post, wondering if i need to buy mount instead. how did you do?

[Autobot152]

Did you guys figure out the rattle? Exhaust leak, heat shield, motor mount?
Just got my 2000 boxster and have same annoying rattle at low Rpms in gear. Thx!