Intake valve picture
Pro
Joined: Nov 2013
Posts: 693
Likes: 158
From: Milwaukee WI
It is available at local auto parts stores for about $12. CRC is a trusted brand and looks promising. I will try some instead of the fuel system cleaners that mix with the gas and will not get to the top side of the intake valves.
Safety Car
Joined: Jan 2006
Posts: 3,940
Likes: 43
From: shavertown Pa.
I bought a can of the CRC last year at Advanced auto at the time CRC had a 5 dollar coupon check the net for the coupon before you buy.
So far I only used it on the mass air sensor it seems to be something like brake clean.
So far I only used it on the mass air sensor it seems to be something like brake clean.
Le Mans Master
Joined: Oct 1999
Posts: 8,205
Likes: 40
From: Tucson AZ
Drifting
Joined: Jun 2008
Posts: 1,365
Likes: 364
From: California
Safety Car
Joined: Jan 2015
Posts: 3,941
Likes: 499
From: Northern Virginia
Racer
Joined: Dec 2013
Posts: 327
Likes: 17
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Aug 2015
Posts: 8,243
Likes: 4,617
From: Southwest Florida
I swapped my intake manifold for one I ported so I took a photo of the valves. This is the clearest picture I was able to get. Notice the small lumps around the base of the stem. This is the start of coking. The car is 12,000 miles on it. The oily sheen is the CRC intake valve cleaner that I sprayed on the valve before I took the picture. Pretty good pic for an iPhone.
At around 5000 miles, I noticed a significant amount of oil from the Z51 dry sump tank puked into the intake manifold. I suppose this relates to the fact it was over filled. I installed an RX catch can about 1000 miles ago so it should reduce the oil going into the intake. The engine never shows that it's low on oil. So it's not burning it and I drive it pretty aggressively. No track time. Car runs great.
BTW, is your catch can actual catching oil and other gunk?
Last edited by Maxie2U; Oct 18, 2015 at 11:51 PM.
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
I asked the service manager at an Austin AutoNation Chevy dealer this question and he said that adding a catch can would not void the warranty. he was very familiar with the coking situation due to directly injection.
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
Drifting
Joined: Dec 2012
Posts: 1,630
Likes: 203
From: MI
You missed my point. If you install it wrong and you have problems because of it. How could a dealership help you out?
Burning Brakes
Joined: Sep 2009
Posts: 918
Likes: 266
From: Ft. Worth Tx.
Buy the way, LBJ Dem, Bushes Rep, apples and oranges.
PLEASE DON'T COME HERE IF YOU DON'T LIKE OUR PHILOSOPHY of LIFE!!!
HOOK-EM HORNS
Joined: Aug 2006
Posts: 3,517
Likes: 842
From: Port Aransas, Texas Tx
St. Jude Donor '08
They are coming here by the thousands everyday, yet they think we do everything wrong. They come here and want to do the same things that screwed up the place they came from, amazing!
Buy the way, LBJ Dem, Bushes Rep, apples and oranges.
PLEASE DON'T COME HERE IF YOU DON'T LIKE OUR PHILOSOPHY of LIFE!!!
Buy the way, LBJ Dem, Bushes Rep, apples and oranges.
PLEASE DON'T COME HERE IF YOU DON'T LIKE OUR PHILOSOPHY of LIFE!!!