Is a pontiac 400 internally or externally balanced. Jan 1, 2005 · You shouldn't have to remove the damper/balance to see if it is internally or externally balanced. This creates issues when it comes time to replace the balancer flex plate/flywheel. Jun 16, 2014 · Pontiac's are in fact externally balanced, not as much as a 400 or 454 Chevy but they are. . Thanks guys. Aug 21, 2020 · The quick answer is that if the rotating assembly is externally balanced, it will have an offset weight on the harmonic balancer and the flywheel/flexplate. Pontiac traditionally did a semi-internal balancing on the crank. Most all factory Pontiacs where "internally balanced" BUT to a required specification and is generally referred to as internally balanced. Jul 31, 2018 · Most Pontiacs (389's, 400's, 428's, and 455's) were balanced like the later SBC's, internal front and external rear. The bolts that hold the plate to the crank are not symmetrical and the plate can only be bolted to the crank in one position. This true rotation or balance makes the crank spin without any additional centrifugal forces that would cause vibrations and lead to bearing wear and possibly catastrophic engine failure. If the engine is internally balanced, the harmonic balancer and the flywheel / flexplate will be neutrally balanced with no offset weights. However, they car be balanced internally without a whole lot of weight added/removed. If you have a digital camera take a few pictures and we may be able to help you. Feb 26, 2009 · I have checked with Farmer engine builders and they state that OEM flex plates are external balanced. Feb 17, 2022 · An internally balanced engine is a neutral balanced engine using no external components to correct an imbalance. yjdsa rhlv ninig vkaz bekq oftk xccoy zwbfs ffgh sxh