Over time the tensioner may have loosened, in addition timing chains can stretch slightly and this can throw off the timing
The factory timing chains have a lot more slack than the aftermarket chains.
The timing chain follower is worn causing a slack condition in the chain. the chain oscillates and so does the timing.
replace the chain and gears
The 350 Chevy does not have a belt, it has a chain. Slack in the chain is normal as long as it is not excessive. A better determining factor on when to replace the chain, is the condition of the gears and if the chain is noisy.
check timing. timing advance. or slack in timing chain/belt
1/4 MAX
A 2000 Skoda Felicia 1.3 mpi has a timing chain. Not a timing belt. A timing chain. So buying a used felicia and not replacing it is not actually risky, as with a car with a timing belt. The chain of course will also develope 'slack', so it is a good idea to change it after so many klms, and/or if it as gotten too noisy. The possibility of the chain breaking is very very very slim. It WILL develope some slack though, and might jump a tooth, worsening performance and fuel economy. Parts are cheap for the felicia.
most commely you will have excessive noise from the chain. i suppose it is possible for timing to jump with excessive slack, but in my experience( master bmw tech. ) i have never seen any timing chain problems. good luck.
Check for excessive slack in the timing chain.
All Malibu both I4 or V6 are chain driven. They don't use timing belt. There is no need to service the chain unless there is a slack then andjustment maybe needed.
Not much but there will be a little.
yes little nut on side lossen then tighten screw