What would cause white valves? January 27, 2014, 09:59:02 PM This is exactly what they look like the pictures not lying Quote Selected
What would cause white valves? Reply #1 – January 28, 2014, 12:00:15 AM I do believe that white is good or normal, but then again I spray paint for a living. Quote Selected
What would cause white valves? Reply #2 – January 28, 2014, 12:14:13 AM I know white on plugs is lean Quote Selected
What would cause white valves? Reply #3 – January 28, 2014, 12:18:36 AM I've heard clean burning or modern "lean burn" fuel causes it. Quote Selected
What would cause white valves? Reply #4 – January 28, 2014, 12:54:21 AM This is what the valves on the GT40Ps I had on my Thunderbird for 6K looked like after I pulled them (they were new when I bought them). The exhaust valves are lighter than the intake valves but not white. Quote Selected
What would cause white valves? Reply #5 – January 28, 2014, 01:08:35 AM It's running lean & TJ's is a little rich on three cylinders, the lighter valve being the desired color... Quote Selected
What would cause white valves? Reply #6 – January 28, 2014, 09:35:34 AM this motor came out of my oldest sons tbird,, we are breaking it down to the block.it ran fine,, had oem HG's and good looking mains and rod bearings.it was prob due to the stock fuel pump. Quote Selected
What would cause white valves? Reply #7 – January 28, 2014, 04:55:09 PM I wonder if the new E10/E15 is contributing to the white valves? Quote Selected
What would cause white valves? Reply #8 – January 28, 2014, 04:58:51 PM Quote from: TurboCoupe50;428049It's running lean & TJ's is a little rich on three cylinders, the lighter valve being the desired color...Actually the lighter exhaust valve looked like the others till I got some gasket remover on it while cleaning the old head gasket off. You can see the far left side of the valve is a bit darker. Actually the car does run a tiny bit on the rich side. I'm going to try swapping MAFs in the spring to see if it leans it out a bit. Fuel pressure is 39 PSI with 24lb injectors and a 155lph Walbro in the tank.Dumb ass me sold those heads in November 2012 (with 6-7K on them) for $300 locally. Two weeks later I bought a Mark VII. I also have a spare GT40 intake sitting around. Stupid, stupid, stupid. Quote Selected
What would cause white valves? Reply #9 – January 28, 2014, 05:04:09 PM Quote from: Thunder Chicken;428092I wonder if the new E10/E15 is contributing to the white valves?Maybe? I've been running that E10 in all my cars for years (all we have here) and the valves on the GT40Ps I pulled off my Thunderbird weren't that white. Thunderbird got 93 octane from the start with this engine though (reduce chance of knock with advanced timing). Quote Selected
What would cause white valves? Reply #10 – January 28, 2014, 07:00:28 PM How about red exhaust valves...? Quote Selected
What would cause white valves? Reply #11 – January 29, 2014, 02:56:06 PM Quote from: ZondaC12;428102How about red exhaust valves...?Fuel additives (like STP) contain chemicals that can turn exhaust valves red. Quote Selected
What would cause white valves? Reply #12 – January 29, 2014, 08:33:06 PM We have e10 here. Ive been running about 16° timing on my tbird with no detination. Quote Selected
What would cause white valves? Reply #13 – January 29, 2014, 09:14:10 PM Wide band monitoring would have put this in perspective. Normally exhaust valves should be light brown across the board. But not uncommon on a stock engine of OBD1 controlled to be a tinge on the white side.(white Not necessarily LEAN but close)Today it is mandatory to monitor A/F at all times. With today's fuels monitoring plug color is basically useless. To an extent when your A/F ratios are correct or near correct.Here is how you fix it. One of my best tuners tuning one of my cars after a cam swap. Mark reads the A/F ratio after he makes adjustments. I maxed out my 42 LB injectors and had do change them out to 65 to get my DC correct Quote Selected
What would cause white valves? Reply #14 – January 29, 2014, 09:34:39 PM Quote from: thunderjet302;428133Fuel additives (like STP) contain chemicals that can turn exhaust valves red.I was told that by SOMEone at SOME point. Apparently the fuel around here has a witch's brew of additives then! Quote Selected
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