Sourcing 7MGTE Valve Shims - OEM Part Numbers and Alternatives

Engineintermediate✓ OP Confirmed

Problem

After having a machine shop sand smooth the cam lobes on a 7MGTE during reconditioning, valve lash measurements were significantly altered, requiring approximately 10 new valve shims of specific sizes in 5-thousandths-of-an-inch increments. OEM Toyota shims were difficult to find in the exact sizes needed and were expensive.

Valve lash out of specification after cam lobe reconditioningMultiple shims needed in precise size incrementsDifficulty sourcing specific shim thicknesses from Toyota dealersSome OEM sizes out of stock

Root Cause

The machine shop sanded the cam lobes smooth to remove minor scoring from age. This removed material from the cam lobes, changing the valve lash across many valves and requiring a large number of replacement shims in varying sizes. The cam lobe scoring was minor and did not actually need to be addressed, making the machining unnecessary.

Confidence

Low confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted January 2023 on SupraForums.com