| Diagram | Fig. 4 — CYLINDER BLOCK AND HEAD · ref 22 |
| Subsystem | engine top |
| Listed in parts books | 1983 |
Inner valve spring
Inner valve spring for the cylinder head, paired with the outer spring to keep the valve seated and controlled.
This is the inner valve spring for the cylinder head, one of the two concentric springs that close each valve after the cam and rocker have opened it. The part shows up in the CYLINDER BLOCK AND HEAD section of the parts book, working alongside its companion outer spring on the same valve stem.
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On a twin-spring valve setup like this, the inner spring is nested inside the outer one, sharing the load so no single spring has to do all the work of keeping the valve seated and controlling the follow-down as the cam lobe passes. If you're rebuilding a head, these are generally replaced in sets rather than one at a time, since a mismatched or fatigued spring in the mix will throw off valve control across the board.
Our catalog record for this one is thin, tied to a single listing, so if you're matching it against a specific head or comparing it to what's currently in your engine, give us a call and we'll confirm it's the right one before you order.
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