Carbon Build-up - ZR-1 Net Registry Forums

chriskinzel · 01-12-2014

I'm in the process of pulling my secondaries. With the IH removed I can see the intake valves. The primary ones are clean, but the secondaries are full of carbon build-up. Any suggestions as how to clean these up. Not ready to do a valve job yet.
Thanks Chris

A26B · 01-13-2014

Chris,

I've seen much worse than what you are showing. I wouldn't worry about it.

When you get your prom redone to use all injectors, use brand fuel but not the same one all the time. They generally have different additives to combat/reduce carbon fouling. If you drive it regularly, I would expect a lot of what you are seeing will disappear.

Dynomite · 01-13-2014

Quote:

Originally Posted by A26B

Chris,

I've seen much worse than what you are showing. I wouldn't worry about it.

When you get your prom redone to use all injectors, use brand fuel but not the same one all the time. They generally have different additives to combat/reduce carbon fouling. If you drive it regularly, I would expect a lot of what you are seeing will disappear.

Good stuff ...............

And yes....that looks normal....

If you ever are thinking of doing a valve job.....do a compression check first ......valve job last.

Take your inspection camera, remove spark plugs and take a peak at the top of the pistons if you want to see some carbon (I know you have such a camera)

And...and...and....if you ever do a valve job pay particular attention to the lifters range of operation such that you do NOT end up with open valves, valves hitting pistons, or valves not fully opening. LT5 New Rebuild Issues (Lifters and Camshafts)

GOLDCYLON · 01-13-2014

Normal and as stated I have seen worse

chriskinzel · 01-13-2014

Thanks for the info! That will put my mind at rest for a moment.

Chris

01-12-2014	#1
chriskinzel Join Date: Nov 2011 Location: Salt Lake City, Utah Posts: 167	Carbon Build-up I'm in the process of pulling my secondaries. With the IH removed I can see the intake valves. The primary ones are clean, but the secondaries are full of carbon build-up. Any suggestions as how to clean these up. Not ready to do a valve job yet. Thanks Chris Last edited by chriskinzel; 01-12-2014 at 06:55 PM. Reason: add photo

01-13-2014	#2
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,404	Re: Carbon Build-up Chris, I've seen much worse than what you are showing. I wouldn't worry about it. When you get your prom redone to use all injectors, use brand fuel but not the same one all the time. They generally have different additives to combat/reduce carbon fouling. If you drive it regularly, I would expect a lot of what you are seeing will disappear. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.

01-13-2014	#4
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,120	Re: Carbon Build-up Normal and as stated I have seen worse __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

01-13-2014	#5
chriskinzel Join Date: Nov 2011 Location: Salt Lake City, Utah Posts: 167	Re: Carbon Build-up Thanks for the info! That will put my mind at rest for a moment. Chris