Intake and Exhaust camshaft lobe to valve tappet clearance

Reply Subscribe

Thread Tools

Search this Thread

Mar 20, 2026 | 11:39 PM

marlion

Thread Starter

Junior Member

Joined: Mar 2026

Posts: 1

Likes: 0

From: California

Intake and Exhaust camshaft lobe to valve tappet clearance

Hello folks, I have an AJ133 motor and I want to know if my clearance measurements are out of spec, or is acceptable. All Data shows the clearance spec for the Intake cam to be 0.2mm with a range of 0.18 - 1.22 and the exhaust is 0.25 with a range of 0.23 - 0.27. Out of all 32 valves, I have 4 valves slightly out of spec.

Can someone tell me if 0.229mm for an Intake clearance and 0.279 for exhaust are out of spec for this motor? Replacement tappet takes me just below spec on both sides. Is it better to be slightly out of spec on the tight side or the lose side of the range?

Thanks