Charner (MS)
Member
I?ve seen several replies concerning the need or no need for the rubber seal on the valve guides. Several replies have been ?not needed on the exhaust guide, only on the intake guide.? To me this is totally wrong. Imagine there were no seals at all on either guide there could possible be a slight leak at either. On the intake stroke if there is a leak little or no effect is detected. Only a miner leak of more air to burn. Now, imagine on the exhaust stroke. It is under pressure as it is expelled. There too only a miner leak. The problem is the leak here goes into the valve spring chamber and then into the oil pan. At 1,200 RPMs that small leak by the exhaust valve will mount and the only escape is through the oil intake pipe. Most people attribute the blue smoke coming from the oil pipe is due to worn rings. Could be but could be valve guides leaking. I say put the rubber seals on all guides. Agree?