322 truck tmg chain

[Guest]

A

Edited December 10, 2017 by Guest (see edit history)

[Beemon]

The chains I found for the 56 Buick 322 were all labeled with the TC488 or TC491 (222491) part number. Maybe the Chev 322 was different? I thought they stopped using them in 57.

[NTX5467]

Chevrolet had their 235 and 261 inline six cylinder engines.  The 235 was for 1/2 tons and the 261 was for 3/4 tons.  Using the then-new 265 V-8 would not have been much cubic inch increase.  Plus many felt that "truck" engines had better low end torque than V-8s of similar size, back then.  So the Buick 322 was for the heavier-duty ratings as in GMCs the Pontiac V-8 was used by them for the 1/2s.  Inline engines still dominated that market, though. 

 

GMC had their own engine family for 6 cylinders . . . starting at 228 (maybe a little smaller for the much-earlier model years) and expanding to 302 for the medium-duty and heavier-duty over-the-road trucks.  So cubic incher were needed.

 

KEY thing about any timing chain is to have matching sprockets.  In some cases, having beefier chains might not offer any real durability advantages with stock cams and valve springs. 

 

NTX5467

[old-tank]

The timing chains  should be the same for all 322's chevy or Buick.  The differences that I remember is the compression ratio (7.x:1 vs higher for Buick engines) and chevy designated a different timing order (no. 1 was  driver front vs passenger front for Buick to match their other engines).  No info on that chain number:  it may be mislabeled; if it matches the old chain and installs, it will give good service.

[old-tank]

http://www.ebay.com/itm/Dynagear-Engine-Timing-Chain-for-Buick-Ford-C491-/282234264131?fits=Year%3A1965|Make%3ABuick|Model%3ARiviera&hash=item41b6791a43:g:HIcAAOSwn7JYETsD&vxp=mtr

A chain that will work...the one above is much longer.

[1953mack]

The 322 cubic inch Buick Nailhead engine was the engine used in the later 1950s Chevrolet and GMC heavy duty trucks and school buses. They were NOT a Chevy 265/283 cubic inch V-8 engine block bored out to 322 cubic inches.

http://forums.aaca.org/topic/182078-nailheads-in-trucks/

 http://www.gm-trucks.com/forums/topic/44399-buick-v8s-used-in-1956-to-1959-chevy-trucks/

 

From Wikipedia...The 322 Nailhead was also used in the 1956 through 1957 Chevrolet Heavy Duty truck, the 10,000 series conventional cabs.

 

Al Malachowski

BCA #8965

"500 Miles West of Flint"

Edited December 9, 2016 by 1953mack (see edit history)

[Guest]

On 12/7/2016 at 12:29 PM, 1953mack said:

The 322 cubic inch Buick Nailhead engine was the engine used in the later 1950s Chevrolet and GMC heavy duty trucks and school buses. They were NOT a Chevy 265/283 cubic inch V-8 engine block bored out to 322 cubic inches.

http://forums.aaca.org/topic/182078-nailheads-in-trucks/

 http://www.gm-trucks.com/forums/topic/44399-buick-v8s-used-in-1956-to-1959-chevy-trucks/

 

From Wikipedia...The 322 Nailhead was also used in the 1956 through 1957 Chevrolet Heavy Duty truck, the 10,000 series conventional cabs.

 

Al Malachowski

BCA #8965

"500 Miles West of Flint"

Thanx 4 all the info! 

Edited December 10, 2017 by Guest (see edit history)