| Also known as | E9353 |
| Diagram | Fig. 4 — MANIFOLD AND TAPPETS · ref 22 |
| Subsystem | engine top |
| Listed in parts books | 1970–1971, 1974, 1976–1979 |
Exhaust tappet guide block
The exhaust tappet guide block that presses into the cylinder block to house and align the exhaust tappets.
This is the exhaust tappet guide block, part number 70-9353, also catalogued as E9353. It's pressed into the cylinder block and houses the exhaust tappets (cam followers), keeping them aligned so the pushrods land correctly on the radiused tappet stems. The block includes an oilway to keep the tappets lubricated and a groove machined in to accept a sealing O-ring.
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It shows up across catalog listings from 1969 through 1979, appearing repeatedly in the manifold and tappets figures alongside the oil pump and release valve. If you're rebuilding the top end and finding worn or scored guide bores, this is the part that needs checking along with the tappets themselves.
Given how many catalog entries reference it over that decade span, it's a part that saw continued production use through those years, but confirm the specific fitment on your engine before ordering since we don't have a model-year breakdown beyond the catalog range.
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