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This is the last part (hopefully) of my continuing engine saga entitled Mystery Valves. In previous messages I explained how the engine would run for a few minutes and then intake valves would stick with lash pads popping out. Several days later I could start the car and it would run for another few minutes and do the same thing.

I took the head off this weekend and into the machine shop this morning. All along I thought it was a botched valve job. Not So. Turns out is varnish buildup from bad gas. (And I thought I had bad gas!) Even though I drained the gas tank. I guess that wasn't enough! In retrospect it was stupid of me not to have cleaned the tank out better. Would have solved ALL my troubles!

The machine shop wants to do another complete valve job. I want to know if I can just let the bottom of the whole thing soak in a de-varnishing solution up to the stem seals for a couple of hours or days and then wipe the valve stems clean through the ports. I REALLY don't want to have to pay for another valve job seeing as I already have over $1000 already into the engine. Opinions please.

On to the gas tank: I'm going to drop the gas tank and open it up to see just how bad the **** thing is. I read in the archive that somebody cleaned the inside of their tank with Tide and then put some sort of 2-part epoxy lining over the insides to seal it up. Is this the best thing to do? Where do I take the 7 gallons of fuel I have in there now? How do I clean the fuel lines out?
 

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Discussion Starter · #2 ·
> This is the last part (hopefully) of my
> continuing engine saga entitled
> Mystery Valves. In previous
> messages I explained how the engine would
> run for a few minutes and then intake valves
> would stick with lash pads popping out.
> Several days later I could start the car and
> it would run for another few minutes and do
> the same thing.

> I took the head off this weekend and into
> the machine shop this morning. All along I
> thought it was a botched valve job. Not So.
> Turns out is varnish buildup from bad gas.
> (And I thought I had bad gas!)
> Even though I drained the gas tank. I guess
> that wasn't enough! In retrospect it was
> stupid of me not to have cleaned the tank
> out better. Would have solved ALL my
> troubles!

> The machine shop wants to do another
> complete valve job. I want to know if I can
> just let the bottom of the whole thing soak
> in a de-varnishing solution up to the stem
> seals for a couple of hours or days and then
> wipe the valve stems clean through the
> ports. I REALLY don't want to have to pay
> for another valve job seeing as I already
> have over $1000 already into the engine.
> Opinions please.

> On to the gas tank: I'm going to drop the
> gas tank and open it up to see just how bad
> the **** thing is. I read in the archive
> that somebody cleaned the inside of their
> tank with Tide and then put some
> sort of 2-part epoxy lining over the insides
> to seal it up. Is this the best thing to do?
> Where do I take the 7 gallons of fuel I have
> in there now? How do I clean the fuel lines
> out?
Steve, On the gas tank part, do you have access to a used tank? What city are you in? I'll try to locate one in your area on our nationwide wrecker hotlines. We have tanks, but UPS really frowns on shipping them unless we take it to a radiator shop and have it boiled overnight, getting rid of all gas and fumes. That is another possibility that you could find a radiator shop to boil it out overnight. We have found that very few will do this anymore, because of environmental policies. If you have 7 gallons of old gas, there are recycling places, and poison centers that will take it. Or farmer Jones probably would.
good luck, Joe
 

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Discussion Starter · #3 ·
> Steve, On the gas tank part, do you have
> access to a used tank? What city are you in?
> I'll try to locate one in your area on our
> nationwide wrecker hotlines. We have tanks,
> but UPS really frowns on shipping them
> unless we take it to a radiator shop and
> have it boiled overnight, getting rid of all
> gas and fumes. That is another possibility
> that you could find a radiator shop to boil
> it out overnight. We have found that very
> few will do this anymore, because of
> environmental policies. If you have 7
> gallons of old gas, there are recycling
> places, and poison centers that will take
> it. Or farmer Jones probably would.
> good luck, Joe

Joe, thanks for the quick response! I called my local radiator shop and they will clean the tank and coat it for $85. I think it is a very good price! I am located in Phoenix, AZ.
 
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