Home page

Topic: Intake and valve cleaning

in Forum: C3 Engines


Already a Member?
Login
Not yet a Member?
Register for Free!

Intake and valve cleaning (1/7)
 8/3/22 1:29pm
my1stc3
Limited Member
Send Private Message

West Haven, CT - USA

Vette(s):
1968 Coupe L36


Joined: 5/3/2022
Posts: 7

Found my intake gasket was leaking oil towards rear area, removed intake and wanted to do more cleanup, what can I use to clean intake manifold ports off engine I ordered cleaner for the outside but wanted to clean inside as well, also noticed valves could use some cleaning but not looking remove heads at this point, I ordered GM top engine cleaner to use once I put back together, but can I use anything while I take is off or is that not safe

Our Sponsors help support C3VR
Re: Intake and valve cleaning (2/7)
 8/3/22 8:52pm
Adams' AppleLifetime Member
Lifetime Member
Moderator
Send Private Message

Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 19925

Clean the intake manifold as best you can, leave the intake PORTS and VALVES in the head alone....very easy to dislodge carbon that will fall down into the cylinder(s) and create more problems. Best to stuff paper towels, or similar into the ports while you scrape the old gasket off the heads, then carefully remove them once the heads are clean of gasket. Also use paper towels or rags to cover the lifter valley while scraping gaskets. 



______________
Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Re: Intake and valve cleaning (3/7)
 8/3/22 11:03pm
NorskyLifetime Member
Lifetime Member
Moderator
Send Private Message

Twin Lakes, CO - USA

Vette(s):
SOLD - "The Toy" - 1970 Convertible
SOLD - "The Beast" - 1990 ZR-1 (#682)
"BLKBRRD" - 1978 Trans Am, 400ci/225hp, 4 spd, Black w/black interior, Hurst t-tops


Joined: 1/23/2002
Posts: 7007

Filling voids with something foamy, like whipped cream or shaving cream, first will catch little things that like to fall into open spaces.  A crevice tool, or some other pointy attachment, on a shop vac will capture all the stuff when you're done messing around.



______________

Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

Re: Intake and valve cleaning (4/7)
 8/3/22 11:20pm
F4Gary
Standard Member
Send Private Message

Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1148

You should be using Top Tier gas as it has more detergents in it than cheaper grocery store type gas.

Also, a fuel system cleaner additive like Techron or Seafoam will start cleaning the intake valves.

Brake cleaner might clean up the intake manifold pretty easily.



______________

Re: Intake and valve cleaning (5/7)
 8/4/22 8:26am
my1stc3
Limited Member
Send Private Message

West Haven, CT - USA

Vette(s):
1968 Coupe L36


Joined: 5/3/2022
Posts: 7

Decided to just stuff paper towels in ports on engine, laid towels in valley while cleaning old gasket, cleaning manifold with simple green and brush waiting for loctite aluminum cleaner and brightener might paint if needed, also yea I do use Shell VPower and Lucas octane booster and will run the top engine cleaner thru carb once back together 

Re: Intake and valve cleaning (6/7)
 8/4/22 1:58pm
F4Gary
Standard Member
Send Private Message

Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1148

With Shell premium gas do you really need octane boost?  Just curious.  10.25 : 1 compression ratio.



______________

Re: Intake and valve cleaning (7/7)
 8/4/22 7:05pm
my1stc3
Limited Member
Send Private Message

West Haven, CT - USA

Vette(s):
1968 Coupe L36


Joined: 5/3/2022
Posts: 7

Yes Shell Gas is good but not sure what previous owner put in the octane booster I was told can help keep away any pinging and should help in cleaning either way just cleaned the intake manifold have correct gasket ordered from zip, but ordered felpro coming tomorrow to compare which is better quality 

Our Sponsors help support C3VR