Re: [Amc-list] E-85 Engine Design

[Wrambler242@xxxxxxxxxxx]

Tom may be able to enlighten us on how the older engines valve seats hold up as I believe he plans to rebuild his wagons engine after years of propane use and many thousands of miles.
  I don't believe propane has any more lubricating properties than E85 would or will.
One thing to keep in mind about the E85 old car thing is that alchohol loves to absorb moisture.
  I low mileage limited use vehicle stored in the winter, may prove to be a PIA to keep the fuel dry...
I'm not sure I'm right on this, but it is something to consider when thinking about things like this.

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrc II
" Chronic Pain Hurts"

 -------------- Original message ----------------------
From: Frank Swygert <farna@xxxxxxx>
> AMC never used hardened seats in any engines. Well, I don't know about the 2.5L 
> four, but I would think not since the 4.0L never got them. My understanding is 
> the slightly tougher castings allowed induction hardening of the entire lower 
> surface of the head, valve seats, combustion chamber and all. That would have 
> occurred on roughly 78 and later engines though. I don't know if hardened seats 
> are a requirement for E85/alky, but most likely is due to no lubricating 
> qualities. Doubt it's any worse than unleaded gasoline though.  
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