I’ll try again just in case it works for others.
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I’ve never done valve guides before. Does that require pulling the heads?If it’s not pushing oil past the rings it’s probably sucking it past the valve guides. Pretty simple fix to replace the cheesy O-ring valve stem seals for the later style umbrella stem seals. Shoot for Tbi era for stock gm or fel pro umbrella seals. They don’t require any machine work to the valve guide boss like aftermarket valve stem seals do.
I put them on the 307 in my Nova and it stopped a lot of the oil burning that engine had.
For just replacing the seals you don't But you will need to remove the rockers and valve springs. You end up doing one cylinder at a time, making sure the piston is at TDC for the cylinder you are working on. Adding air from a leakdown tester in the spark plug hole will hold the valves up. But having the piston at TDC will you from dropping a valve in the hole. Once the spring is off, swapping the seal is pretty simple.I’ve never done valve guides before. Does that require pulling the heads?
The shop build has officially started,
