What should inside of runners look like after 80,000 mi

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Dec 9, 2002 | 08:04 PM

novass

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From: Grand Island, NY

Car: 1990 Formula

Engine: 305 TPI

Transmission: WC T5

What should inside of runners look like after 80,000 mi

Those of you who have taken off your runners after a significant amount of milage, I have a question.

What did the inside of the runners look like.

Mine had a relatively thin coating of what apeared to be cooked on soot/oil mixture. It was not thick nor powdery just a baked on thin layer that castrol super clean and a bottle brush took off with some scrubbing. Is this normal for this much milage? Would it be from the recycling of the egr gases?

Let me know what you think.

Dec 9, 2002 | 08:22 PM

Greasemonkey

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From: Anderson, IN

Car: 86 Cutlass

Engine: 350

Transmission: 200-4R

I have no clue how many miles were on my runners (bought the setup for the swap), but they looked just like you described.

Dec 9, 2002 | 08:25 PM

Cruzin Kaz

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From: Welland, Ontario, Canada

Car: 85 Monte Carlo SS...

Engine: T.P.I L98.

Transmission: TH350

Axle/Gears: 3:73 Posi

What you found was carbon build up, and yes that is normal for that amount of miles. While you have it all apart you should polish everything up inside to allow cleaner flow.