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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Are old BMWs still pushing out the same ammount of power?



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      06-09-2016, 06:53 AM   #1
TheMidnightNarwhal
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Are old BMWs still pushing out the same ammount of power?

I'm looking at getting a used ~2007 335i with around 100k KM. Do plan to do a filter change and oil change as soon as I get it, depending on their condition.

Now has it lost it's HP over the course of it's years?

Last edited by TheMidnightNarwhal; 06-09-2016 at 07:45 AM.
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      06-09-2016, 07:37 AM   #2
John 070
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edit: I would think they are not--meaning they have lost power due to age/wear.

Did they make a 2007 330i in Canada?

The 330i didn't have that much torque to begin with (from memory 30 ft. lbs. less than a new 328i 4 cyl), would it really matter if a 9 yo car doesn't put down the numbers that it had 9 years ago?

Are you a Habs fan?

Last edited by John 070; 06-09-2016 at 07:46 AM.
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      06-09-2016, 07:47 AM   #3
TheMidnightNarwhal
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Quote:
Originally Posted by John 070 View Post
I would think so.

Did they make a 2007 330i in Canada?

The 330i didn't have that much torque to begin with (from memory 30 ft. lbs. less than a new 328i 4 cyl), would it really matter if a 9 yo car doesn't put down the numbers that it had 9 years ago?

Are you a Habs fan?
Sorry I keep writing330i instead of 335i whic is what I meant.

Yes I am, kinda.
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      06-09-2016, 07:47 AM   #4
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My 07 is probably faster than when I got it about a year ago. A little maintenance goes a long way. Sensors still sense, compression is compression either way. If that's low, you have bigger problems. Maybe fuel injection could suffer but I run techron through every oil change and there's not a hiccup when I'm revving her out. Only a slight idle issue, but from what I search, every bmw has an idle problem lol. Side note, my car happened to be well maintained by the previous owner.
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      06-09-2016, 10:52 AM   #5
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Car & Driver does 40K mile (66K km) tests of cars. They're almost always a bit faster at the end of the test than at the beginning. Part of that is attributed to an engine that is well broken in (and they always follow manufacturer's break-in recommendations), and the rest to tires and other mechanical wear.

Now, 66K km is not 100K km, but the likelihood of losing much in that other 34K km is not high. IME, only bad compression causes power loss, and that takes well over 150K miles (>200K km) to occur, perhaps never.
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      06-09-2016, 11:30 AM   #6
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At that mileage the car might have some carbon build up that is robbing power. The 335i's are direct injection so you do get buildup on the intake valves and chamber. Do some searching about carbon build up and walnut blasting before/after pics to get an idea of what I'm talking about.
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      06-09-2016, 11:35 AM   #7
TheMidnightNarwhal
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Quote:
Originally Posted by Volasko View Post
At that mileage the car might have some carbon build up that is robbing power. The 335i's are direct injection so you do get buildup on the intake valves and chamber. Do some searching about carbon build up and walnut blasting before/after pics to get an idea of what I'm talking about.
That's exactly what I'm worried about mostly.

But fuel cleaner system regular use should clean that out or block it from happening right?
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      06-09-2016, 11:38 AM   #8
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Quote:
Originally Posted by TheMidnightNarwhal View Post
That's exactly what I'm worried about mostly.

But fuel cleaner system regular use should clean that out or block it from happening right?
would not because the fuel does not come in contact with the intake valves...but, cost of these procedures have come way down, I believe around $450 now...
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      06-09-2016, 12:06 PM   #9
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Fuel cleaner never hits the valves in DI cars.

Fuel cleaner never hits the valves in DI cars.
Because the injectors are in the cylinder .
That is one of there downsides of direct injection.
That is why there are so many threads about Walnut Blasting.
This effects most all Direct Injected Cars .
The 330 in the US is not direct injected though but the
335 is.
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      06-09-2016, 12:08 PM   #10
TheMidnightNarwhal
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Alright thanks for the info.

I will look into a walnut blast.
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      06-09-2016, 12:11 PM   #11
ctuna
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Look up the threads on Walnut Blasting

Look up the threads on Walnut Blasting to see the nasty
results of Carbon Build up. This procedure should be done about
every 30 to 50k miles.
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      06-09-2016, 12:13 PM   #12
TheMidnightNarwhal
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Quote:
Originally Posted by ctuna View Post
Look up the threads on Walnut Blasting to see the nasty
results of Carbon Build up. This procedure should be done about
every 30 to 50k miles.
Yeah I know what carbon buildup is and how it looks but totally forgot with a DI engine fuel cleaners won't do shit because the fuel is injected directly into the cylinder (right?) .

I wonder if it's easy to find a shop like that near Ottawa.
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      06-09-2016, 02:41 PM   #13
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I wouldn't say that fuel system cleaners won't do "anything".
They just won't help with carbon buildup on the backside of the intake valves.
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      06-09-2016, 03:42 PM   #14
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Quote:
Originally Posted by TheMidnightNarwhal View Post
I'm looking at getting a used ~2007 335i with around 100k KM. Do plan to do a filter change and oil change as soon as I get it, depending on their condition.

Now has it lost it's HP over the course of it's years?

With any used car, components are subjected to wear and tear. With proper maintenance, HP loss (if any) would be negligible.
It will really depend on how much work the car needs.

That said although 100km is low for a 2007, being 10 years old, the car itself is due for a multitude of standard maintenance (or near requiring). Carbon blast, plugs, injectors, coils, shocks, etc.
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      06-09-2016, 04:08 PM   #15
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That happens with age. The older it is, the less get Up and go it has.
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      06-09-2016, 05:36 PM   #16
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If the engine has lost compression, then it will have lost a bit of power. But, remember that usually happens due to lack of servicing. When engine oil gets old and contaminated, that is when bore wear occurs, which is when you lose compression. If the engine has had regular oil changes with the right oil, and has been warmed up properly before any high rpm work (cold wear is the other enemy) then it may well be pushing out the same power as it originally did. That's assuming the sensors are working as they should, and the fuel and ignition systems are also in good order. You won't notice 5 or 10 hp loss anyway. Best thing to do is get it on a dyno. If it's putting down around the 250 whp mark then the engine's doing what it should.
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