Unleaded fuel 1969 Riviera

Discussion in 'The Bench' started by 1969briviera, Feb 13, 2020 at 3:27 AM.

  1. hugger

    hugger Well-Known Member

    Same here,..
  2. telriv

    telriv Well-Known Member

    When an engine is seasoned it means that ALL things inside are OK. As far as valves/seats go just driving the car seasons the valves & seats through induction hardening. It means the engine has had time over time to harden things as it goes through the process of heating & cooling. When the heads are removed for re-conditioning is usually where the problems come in. SO, IF it's still original I wouldn't worry about it just add the additive for more of peace of mind other than anything.
    Just my thoughts on the subject.

    Tom T.
  3. 1969briviera

    1969briviera Antique Gold Poly

    Thanks Tom, since i don't drive it that many miles a year and certainly don't race the engine i think i am not going to add anything but fresh ethanol free gas which we still have here (still...)
  4. gstewart

    gstewart Well-Known Member

    I owned, from new, a 1970 Malibu with 350-4v. The car was built in April 1970> I was informed that the heads at the point in time had hardened valve seats.
  5. Quick Buick

    Quick Buick Arlington Wa

    Highly doubtful... 72 77 & 81 chevy 350 that I know were one owner motors did not have hardened seats..

    Chevy also claimed they started to put roller cams in their SBCs in 86. LO3 -LO5 . Ive pulled enough of those apart also never saw a roller yet..
  6. telriv

    telriv Well-Known Member

    IF I remember correctly it was Olds that started using rollers in '86 to there 307 engines???
  7. Quick Buick

    Quick Buick Arlington Wa

    Ok did a bit of reading Lo3 & 5 car motors have the roller cam. Not the truck. Way to go Chevy And people wonder way I hate Chevys and own 2 of them..
    FWIW. 350 boat. Other is a 92 caprice with a TBI not the junk LT1

Share This Page