Valve job
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Freshman User
Joined: Oct 2004
Posts: 38
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From: Auburn, WA
Valve job
I just pulled those heads off my c8. I figure I need to make sure all is good before it goes in the truck and I can put some new head gaskets in. My mechanic friend suggested that I check the valves buy puting paint thinner down the valves and the should seal. they seeped a little thinner out, but also help most of the thinner. Has anyone ever heard of this. And if so could it be the springs not closing the valves?
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
never heard of doing it that way but I don't see why it wouldn't work, and in this case I would say no your problem is not springs not closing the valves. If the valves and seats are sealing even 20lbs of spring preasure would keep them closed enough to prevent them from seeping (and even the wimpiest cam should have more than 20lbs of closed preasure) have the valves reground, and atleast have the spring preasures checked.
Senior User
Joined: Apr 2003
Posts: 432
Likes: 3
From: Oregon Coast
Paint thinner won't hurt anything. Alcohol has water in it and left in there for very long will rust your seats and ports. Why not just use a little gasoline? Anyway if they are suspect then bust for a valvejob. Now is the time since the heads are off.
Post Fiend
Joined: Mar 2004
Posts: 6,056
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From: Union, Washington
Originally Posted by Hired Gun
Paint thinner won't hurt anything. Alcohol has water in it and left in there for very long will rust your seats and ports. Why not just use a little gasoline? Anyway if they are suspect then bust for a valvejob. Now is the time since the heads are off.
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Senior User
Joined: Apr 2003
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From: Oregon Coast
Once alcohol is exposed to air it starts drawing water. It ruins steel and aluminum parts in short order. Alcohol is a poor choice of liquid to check valve seal. On the other hand it is an excellent degreaser and paint prep.
As far as gasoline being dangerous why is it when I run gasoline in my dragster I'm only required to wear a single layer firesuit where if I run alcohol I'm required to wear a double layer? Alcohol is a far more dangerous liquid in the shop, it's just as explosive and the flames are hard to see. A few cc of gas won't hurt anything. You could also spray brake clean or even WD40 in there. Both are just a flamable but so is solvent, spray paint, "acetone" (is absorbed through the skin and causes liver cancer) and most other chemicals commonly used in the shop.
As far as gasoline being dangerous why is it when I run gasoline in my dragster I'm only required to wear a single layer firesuit where if I run alcohol I'm required to wear a double layer? Alcohol is a far more dangerous liquid in the shop, it's just as explosive and the flames are hard to see. A few cc of gas won't hurt anything. You could also spray brake clean or even WD40 in there. Both are just a flamable but so is solvent, spray paint, "acetone" (is absorbed through the skin and causes liver cancer) and most other chemicals commonly used in the shop.
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Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Originally Posted by Hired Gun
Once alcohol is exposed to air it starts drawing water. It ruins steel and aluminum parts in short order. Alcohol is a poor choice of liquid to check valve seal. On the other hand it is an excellent degreaser and paint prep.
As far as gasoline being dangerous why is it when I run gasoline in my dragster I'm only required to wear a single layer firesuit where if I run alcohol I'm required to wear a double layer? Alcohol is a far more dangerous liquid in the shop, it's just as explosive and the flames are hard to see. A few cc of gas won't hurt anything. You could also spray brake clean or even WD40 in there. Both are just a flamable but so is solvent, spray paint, "acetone" (is absorbed through the skin and causes liver cancer) and most other chemicals commonly used in the shop.
As far as gasoline being dangerous why is it when I run gasoline in my dragster I'm only required to wear a single layer firesuit where if I run alcohol I'm required to wear a double layer? Alcohol is a far more dangerous liquid in the shop, it's just as explosive and the flames are hard to see. A few cc of gas won't hurt anything. You could also spray brake clean or even WD40 in there. Both are just a flamable but so is solvent, spray paint, "acetone" (is absorbed through the skin and causes liver cancer) and most other chemicals commonly used in the shop.
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