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  1. Thread: Oil question

    by JohnZ
    Replies
    2
    Views
    181

    With your vintage engine, the Mobil 1 synthetic...

    With your vintage engine, the Mobil 1 synthetic oil does nothing for you except increase your oil change costs. What's important for your engine is to ensure an adequate level of ZDDP in the oil to...
  2. Replies
    8
    Views
    264

    Question: I worked at St. Louis-Corvette in 1967-68, and...

    I worked at St. Louis-Corvette in 1967-68, and there was no fire - the records simply weren't kept - GM was in the business of building cars, not storing records. Assembly plants have very little...
  3. Replies
    4
    Views
    1,600

    Help! I'll defer to one of the '54 experts when one...

    I'll defer to one of the '54 experts when one chimes in, but it's my understanding that ALL '54 Corvette engines were suffixed with "F54YG", AND they were all built at the Flint Motor Plant (thus the...
  4. Replies
    5
    Views
    409

    The leaf spring was 2-1/4" wide from '63-'77, and...

    The leaf spring was 2-1/4" wide from '63-'77, and changed to 2-1/2" for '78-'79. The rear cover casting number didn't change - what DID change was the diameter of the four bolts retaining the spring...
  5. Thread: Ac 44 plug.

    by JohnZ
    Replies
    2
    Views
    281

    I'd avoid the "S" (extended tip) with your L-79;...

    I'd avoid the "S" (extended tip) with your L-79; there have been reports of the tip contacting the pistons on the SHP engines with domed pistons.

    :beer
  6. Thread: Rear jack point

    by JohnZ
    Replies
    5
    Views
    393

    The strongest (and most stable) floor jacking...

    The strongest (and most stable) floor jacking point is the spring retainer plate on the bottom of the differential. :thumb

    :beer
  7. Question: You'll probably get a better/faster answer if you...

    You'll probably get a better/faster answer if you post in the C5 Forum - this forum is for C1/C2, decades before CD's were invented. ;)
  8. Thread: Fuel pump?

    by JohnZ
    Replies
    4
    Views
    412

    When I had C1's, I made up a special plug for the...

    When I had C1's, I made up a special plug for the male fitting on the pump end of the main fuel line on the frame; it's standard Weatherhead fittings - it's a 3/8" SAE double female flare union with...
  9. Replies
    3
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    340

    Question: "Highly Intolerant" = broken fiberglass = new...

    "Highly Intolerant" = broken fiberglass = new paint = $$$

    :beer
  10. Replies
    3
    Views
    340

    Question: No, it's not - the rear underbody and...

    No, it's not - the rear underbody and wheelhouses/quarter panels are the same, common to both body styles; there is no difference. Folks forget that the midyear body and chassis were designed in 1960...
  11. Question: I've never seen anything officially published by...

    I've never seen anything officially published by Chevrolet, but one of the dyno techs at Tonawanda said the L-88's and ZL-1's consistently showed over 500hp, and the guys who designed/developed those...
  12. Thread: c2 power brakes/

    by JohnZ
    Replies
    4
    Views
    361

    Fortunately, 1967 was the ONLY year where the...

    Fortunately, 1967 was the ONLY year where the manual and power brake systems both used the SAME master cylinder (casting #5455509, stamped "DC" on the machined pad at the front), so you can use the...
  13. Replies
    4
    Views
    468

    Tracing a car's history is simply good...

    Tracing a car's history is simply good old-fashioned detective work, starting with the person you bought the car from and working backwards; the NCRS can tell you who the original selling dealer was,...
  14. Replies
    1
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    315

    Question: The 1964 (only) had two additional inboard body...

    The 1964 (only) had two additional inboard body mounts per side, forward of the luggage stop panel; they were eliminated for 1965. Shown in the Assembly Manual, section 1-Mounting, sheet 2.00. :thumb...
  15. Question: Yes, they did - they just picked a different...

    Yes, they did - they just picked a different point on the curve as the rating point - I have the Chevrolet Engineering Change that revised the advertised hp and released new air cleaner stickers on...
  16. Question: I'll chime in here too. With manual steering set...

    I'll chime in here too. With manual steering set on the faster ratio, the steering effort isn't appreciably different; those of us who learned to drive back in the day when power steering was rare...
  17. Question: I did too - I was the Senior Process Engineer at...

    I did too - I was the Senior Process Engineer at the Chevrolet Pilot Line and GM Assembly Research Center from 1966-1969, then moved on to Lordstown. :thumb

    :beer
  18. Thread: 58 paint

    by JohnZ
    Replies
    4
    Views
    389

    Question: Corvettes don't have gelcoat, but boats do. What...

    Corvettes don't have gelcoat, but boats do. What you're seeing is contamination of the fiberglass from absorbing standard brake fluid, which occurred prior to changing it over to DOT5 silicone fluid....
  19. Thread: Transmission oil

    by JohnZ
    Replies
    7
    Views
    548

    GL-5 won't hurt it a bit. :) :beer

    GL-5 won't hurt it a bit. :)

    :beer
  20. Question: VIN numbers (E53F001001 - E53F001300) make it...

    VIN numbers (E53F001001 - E53F001300) make it pretty clear that it's 300.

    :beer
  21. Replies
    4
    Views
    938

    Talk to Bair's in Linesville, Pennsylvania (Yogi...

    Talk to Bair's in Linesville, Pennsylvania (Yogi Bair's Parts & Service For Corvettes) and see what they can do for you.

    :beer
  22. Thread: 1964 Header Bow

    by JohnZ
    Replies
    2
    Views
    339

    Sully's or Coffman Corvette should have one -...

    Sully's or Coffman Corvette should have one - both manufacture Corvette soft top frame parts.

    :beer
  23. Replies
    3
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    419

    Yup - John DeGregory, JohnDeGreg@aol.com. ...

    Yup - John DeGregory, JohnDeGreg@aol.com.

    :beer
  24. Question: The standard under-car exhaust system was made by...

    The standard under-car exhaust system was made by Walker, and Arvin supplied the RPO N-11 under-car "off-road" exhaust system. St. Louis had no way to measure horsepower (no chassis dyno at the...
  25. Replies
    2
    Views
    434

    Not on the L-36 (or L-68 3x2) - they had cast...

    Not on the L-36 (or L-68 3x2) - they had cast pistons, which were fitted with conventional close .0009"-.0015" clearances; it might have been an issue on some L-71's which had much looser-fitting...
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