graphX250

So I have a friend that works at a local dealership and we were talking about the carbon build up issue. He told me that with the cars not under warranty that don't qualify for the top engine clean out, what they do is run the engine till it gets warm then drop it in nuetral rev it up and redline the rpm's for a couple minutes to try and burn it off. Not sure about anyone else, but that's one reason I don't let anyone touch my car.

Jmags

iTrader: (1)

Forget that, I'd rather floor it on the highway......

jbjones85

iTrader: (20)

Hmmmm I wouldn't go to that dealer. Scary

XhyDra

iTrader: (8)

That's one way to ruin a car. Redlining it to clean out carbon build up. This dealership sounds like the Quick Lube of the dealerships. That's some shoty service! Redlining in neutral isn't going to help it go away.

That let's you know what really goes on in the service garage.

Jmags

iTrader: (1)

what is this top engine clean out?

I just bought a 2007 250 with 52k miles on it.

I did floor it the other night and my friend said some real dark smoke came out of the pipes!

DatsunME

Give it the old "Italian Tune Up"

chikoo

do it after pouring a bottle of techron or lucas or even mmo. might even work!

Sffd103

iTrader: (16)

That sounds sooo shady!!! When is warranty over? 60K?

CleverName

The only real way to do it without a tear-down.
http://vimeo.com/3989681

V

lexusis305

iTrader: (2)

Make sure to use 93 octane and add octane booster to clean some carban bluid up

Jetfire

iTrader: (3)

^that's useless. octane booster is a waste of money. and 93 is a waste of money.

XhyDra

iTrader: (8)

Maybe so but I'd give his suggestion the benefit of the doubt, considering he's a Lexus Tech, and owns and IS250.

Kurtz

iTrader: (1)

Given that octane is simply a measure of resistance to detonation (and the car should already not be detonating with 91, since that's what it's programmed for) and that octane has no inherent "cleaning" properties it's a fairly silly suggestion.

Further, if the issue really comes from the intake valves, the fuel never touches those (which is why this doesn't happen on the 350)... so the suggestion to make a fuel change is even sillier.

iRock

iTrader: (12)

Ask your friend who came up with this "carbon fix". Who does that? That sounds crazy

Jmags

iTrader: (1)

Is this something that a car 250 awd would need after 52k miles?