My Pressure Washer needs the Intake Valve unstuck (possibly replaced) as this Valve is stuck in the inward position. I can't pull the Valve out to its correct position, so I need to push the Valve out (or replace the Valve) from the piston side. I have successfully removed the 3 Bolts which attach the engine to the water pump. However, I am unable to separate the engine crankshaft from the water pump driveshaft on this unit--the 2 are badly rusted/seized. I understand that much "wiggling" may be required to separate, but I have tried this to no avail.

Viewing several videos on YouTube (including one by Tom Lang subject GCV160 Valve Replacement) it seems that as long as I can remove 4 bolts on the underside of the engine I should be able to perform the remainder of the Valve Repair/Rebuild with the bottom half of the engine still attached through the "Deck" to the Water Pump. I believe I can access these 4 bottomside bolts by moving the engine/WaterPump around relative to the Deck. Of course there are another 4 bolts that I will need to remove from the top side of the engine/Deck.

Does anybody see any problem with this approach? Please advise, all inputs are appreciated.

Thanks for the input MTR-Admin. I am quite sure this Engine is going to need a carburetor ( it was exposed to a lot of rain during past September Hurricane Florence) so having to buy a pump too would make it "cost unreasonable" to get it fully working (in which case I will sell just the engine). thanks again, I will post updates as I make progress.