Uneven sound while cranking is low compression, IMO OP will waste time with a compression test. We already know that cylinder isn't contributing.

Once the leakdown test is done, we'll know immediately just how severe the situation is. As in, whether the valve train failed or the piston failed.


















By the way, what exactly was the fuel it was given?

__________________
1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.