My 95 Chevrolet Lumina-Sedan/Coupe 3.1L SFI OHV 6cyl, has some hydrolyic valve lifters stuck after the engine quits. The engine had been making tick-tag noises for awhile before. Now the engine can be restarted and run but very rough, not all cylinders running from open valves?.
Can these stuck lifters be removed then replaced? what about the camshaft lobes? damaged? Want to replace both cylinder heads, will it work?
Thank you in advance for your prompt advices.