Shop tip to anyone rebuilding a 60s-70s engine: try not to mix pulleys, water pump, and harmonic balancer from different years. Yes they will all fit, but the pulleys may not line up.

4,965

Asked by Feb 28, 2014 at 12:10 PM about the Pontiac GTO

Question type: Maintenance & Repair

Pontiac changed pulley design nearly every year, for many different models and applications. The water pump changed from 8 bolt to 11 bolt in 69 but there are also short snout and long snout variations. The harmonic damper changed from 3 bolt to 4 bolt in 68. My point is, try to keep the front of the engine consistent, If you're rebuilding a mid-70's 400 and want it to look like a mid 60's, take the time to match everything. Timing cover, pump, pulleys, harmonic damper, air conditioning. There are combos that will work, but many that don't.

2 Answers

85

Been there, huge hassle - added power steering to my '68 - Thanks to my friend Steve Snyder (RIP Steve...) we found a combination that worked but it took several tries!

1 of 1 people found this helpful.
4,965

Sometimes you have to try full-size combos when adding PS or AC. Why Pontiac made them different I have no idea. Glad you were able to make it work!

Your Answer

Pontiac GTO Experts

  • #1
    Rucko
    Reputation
    780
  • #2
    Norm Davis
    Reputation
    370
  • #3
    F_O_R
    Reputation
    200
View All

Related Models For Sale

Used Pontiac G8
8 Great Deals out of 401 listings starting at $4,450
Used Ford Mustang
337 Great Deals out of 42,077 listings starting at $1,488
Used Chevrolet Camaro
385 Great Deals out of 31,360 listings starting at $3,495
Used Chevrolet Corvette
116 Great Deals out of 16,011 listings starting at $3,995
Used Pontiac Firebird
8 Great Deals out of 693 listings starting at $2,850
Used Dodge Challenger
178 Great Deals out of 25,792 listings starting at $7,250
Used Dodge Charger
323 Great Deals out of 35,828 listings starting at $1,999
Used Chevrolet SS
3 Great Deals out of 218 listings starting at $27,995
Used Ford Mustang SVT Cobra
5 Great Deals out of 261 listings starting at $4,795
Used Cadillac CTS-V
5 Great Deals out of 569 listings starting at $9,950
Used Mitsubishi Lancer Evolution
13 Great Deals out of 592 listings starting at $12,700
Used BMW M3
33 Great Deals out of 1,852 listings starting at $5,495
Used Chevrolet Silverado 1500
2,725 Great Deals out of 156,634 listings starting at $1,000
Used BMW 3 Series
1,140 Great Deals out of 33,940 listings starting at $1,209
Used Pontiac Grand Prix
13 Great Deals out of 2,469 listings starting at $1,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.