Quote:
Originally Posted by Weasy2k
Toyota has 3 different valvetrain setups
Small Bucket - Used in Pre 93 engines I4 and V6
Medium Bucket - Used in all Post 93 engines for I4's and V6's (depending on engine some start using the larger buckets in 91 (example the 3s-gte)
Large Bucket - Only found on the 3.0L 3vz-E 4runner v6
The medium bucket engines will all interchange as well as the small bucket ones.
You can find shimless buckets for the v6's from the I4 1zz-ge engine. They are the same ones that the 3s-gte guys use.
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How come this isn't stickied somewhere? I feel much more educated now.
Weasy, the 1GR still uses shimless buckets with conventional cams. It's the only GR to do so. The Toyota EPC illustrations confirm it. Perhaps in the future, Toyota will redesign the heads to mimic the other GRs (roller rockers, unique, rounded concave cam lobes for increased valve lift, and dual VVT-i) for a good performance gain to extend the life of the engine.