From the Reference Section:
- Carter Dual 4-Barrel Carburetor Idle Adjustment
- Carter Dual 4-Barrel Carburetor Adjustment
- Carter Dual 4-barrel Carburetors, Linkage Sticking
- Buick Cam Specifications for 401 and 425 nailheads
- Buick Cams from Kenne Bell, 401, 425
    - Nailhead Engine Specifications
- Head Flow Chart
- Nailhead Oil Pump
- Nailhead cam specs and cam selection
- Nailhead Parts Interchange
Page 3 of 3 FirstFirst 123
Results 21 to 22 of 22

Thread: 425 nailhead oil choice?

  1. #21
    Join Date
    Aug 2015
    Oakland Ga
    My Feedback

    (0% Positive Feedback)
    Rep Power
    The incidence of valve train failure may be more common when parts (camshaft/lifters) are replaced. A cam that has been broken in properly and in the engine for many years may be just fine and using modern oils in it may not create a problem. I think it really depends on that, and how the car is driven as well. If you like to drive it like a performance car, RPM and heat increases the demand on any engine and the components where there is extreme pressure created in a very small area. The ZDDP critical to the survival of those parts has been engineered out of modern oils (and diesel oils) for many years now, so Rotella may not be as good as it once was. Diesel engines have different needs than gas engines. Diesels are low RPM motors, and they contaminate the oil much faster. The anti foaming/detergent additive package in diesel oils is much different than oil for gasoline engines. Something else I learned in researching this is that the calcium detergents and ZDDP fight each other in an engine. ZDDP wants to stick to engine parts, detergents try to clean it off. That is why additives may not be as effective as intended depending on the oil they are used in. There was a good thread on this on V8buick years ago. Worth reading,

    I think anyone rebuilding an engine with new cam and lifters should be concerned with using modern oils. My current engine uses a roller cam and lifters and roller rockers. I still use Joe Gibbs hot rod oil as that is what my engine builder recommended. I have been using this oil for 6 years now. my car gets driven hard on the street, and I have about 30 11 second passes down the 1/4 mile. So far, so good.

    They also make a specific break in oil, BR-30. I think it is relatively cheap insurance.

    1970 GS455 Stage1 Race weight 4025 lbs.
    TSP 470, 602 HP, 589 TQ
    MT headers, Gear Vendors Overdrive
    Best E.T. 11.54 Best MPH, 116.06
    1998 Riviera SC3800

  2. #22
    Join Date
    Sep 2015
    Sun City W
    My Feedback

    (0% Positive Feedback)
    Rep Power

    425 nailhead oil choice

    Thank you Airy Cat for sharing that information. I really appreciate it. John

Similar Threads

  1. best intake choice for 73' 455 performance
    By 68 455 gamecock in forum Big Block: 400, 430, 455
    Replies: 8
    Last Post: 05-27-2018, 01:45 PM
  2. 300 best carb choice?
    By tbyro1 in forum Fuel Systems, Intake to Exhaust
    Replies: 4
    Last Post: 07-09-2016, 02:29 PM
  3. Choice of paint for 66 Riv.
    By Rivvyluver in forum Restoration Talk
    Replies: 6
    Last Post: 11-03-2013, 09:47 AM
  4. cam and crank bearing choice.
    By bigfinger in forum Big Block: 400, 430, 455
    Replies: 1
    Last Post: 10-04-2011, 11:11 AM
  5. Cam choice 425
    By Bob in forum Nailhead: 264, 322, 364, 401, 425
    Replies: 8
    Last Post: 09-28-2011, 09:22 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  • Privacy Policy