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post #1 of (permalink) Old 05-21-2007, 02:40 PM Thread Starter
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Question Leaded gasoline for the 46 willys?

just had a thought......

should i be running a lead additive for the CJ2a ? i dont know when they stopped using lead....

i dont know if the previous owners put in hardened valve seats.....i doubt it, but you never know.

will lead hurt an engine if it does have the seats?




it smokes pretty bad.....so it will get rebuilt eventually....but i'll prolly tool around with it before then and i'd hate to damage it more....

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post #2 of (permalink) Old 05-21-2007, 03:20 PM
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Quote:
Originally Posted by JeepnGreg View Post
just had a thought......
should i be running a lead additive for the CJ2a ? i dont know when they stopped using lead....i dont know if the previous owners put in hardened valve seats.....i doubt it, but you never know.will lead hurt an engine if it does have the seats? it smokes pretty bad.....so it will get rebuilt eventually....but i'll prolly tool around with it before then and i'd hate to damage it more....
Can you even get Leaded fuel?
On an old smoking motor, I don't think I would worry about it.
I've seen a lot of damage to Alum motors (VW's, etc) from the unleaded fuel back in the 1970's ..... don't recall much in low compression motors like your 4 banger?

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post #3 of (permalink) Old 05-21-2007, 05:30 PM
 
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You don't need it.
Lead was a lubricant for the valve seats and guides.
Modern fuels use a lubricant (lead substute).
When lead was first dropped, they didn't have a suitable substute, but now they have several.
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post #4 of (permalink) Old 05-21-2007, 06:00 PM
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Many years ago (before you were born), there was considerable discussion about lead and the effects on engines....many predicted that without it, your engine would die a quick death.....one of the assumptions was that your valve seats needed it to seal properly.

Well....most of the predictions were wrong. As stated above, modern fuels have enough additives to make up for the loss of lead.

And to clear up a little point....the main purpose of lead was for a cheap way to increase the octane level of gas...it was not originally intended as a lubricant. Which leads to another point....octane level does not have a direct effect on HP....it determines the pre-ignition point of the fuel....but, the higher the compression, the higher of an octane level you need.....and the higher your compression, the more 'potential' hp you can get.

So...many people think you need a high octane level to get hp...no, you need high octane to keep the engine from destroying it's self under the high HP conditions.......

And I predict that this thread will now turn into one of those monsters that make us all want to groan.....

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post #5 of (permalink) Old 05-21-2007, 07:07 PM Thread Starter
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ok...lets not go there....Lol!


conversation closed before it gets ugly....


thanks for the replies




random side note on the willy's.....it was running like total garbage....so i went tot he carb, noticed it was leaking gas.......so today i tightened all the body screws on it....they were ALL FINGER LOOSE! no wonder it ran like arse........so that help a bit....i'm going to replace the carb with a later model, and then maybe it will idle for more than a few mins at a time....


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post #6 of (permalink) Old 05-21-2007, 08:15 PM
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Slap a new carb on it with a new gasket and it should be right as rain. A good place I dealt with before: Willys jeepster, willys station wagon, cj5 parts, jeep wiring harness, jeep cj2a

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post #7 of (permalink) Old 05-22-2007, 10:37 AM
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I drove a Studebaker Lark during my college years on unleaded gas. Ran like a champ! Adding a lead substitute won't hurt the engine, but it will clog up a catalytic converter. That shouldn't be a problem on a CJ2-A!

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