Ty engine reliability

[LT1cnqst]

I,m looking for the answer to the question of how reliable are the Sy/Ty motors and what parts seem to break the most. I am sure someone out there can give me a insight on this subject.

 

[tbauer03]

Well it depends on how you drive it. The 4.3 motor is a pretty nice motor and i have seen stock ty's in the 200,000 miles area, so keep good mobil 1 oil in it and don't beat the shit out of it and it will last as long as you want it too. More than likely your tranny will take a crap multiple times before your engine does anything.

One thing to avoid is detonation it will cause all sorts of problems like bent connecting rods but keep it in tune, always use good gas, and get a good scantool for when u wanna race it and it will be fine.

I am sure somebody will chime in like an asshole and tell you to use the search function which you should there is a lot of good info on here if u look for it. Just trying to tell u in a nice way.

 

[Jimmy]

I've put 40k on my rebuilt motor,no problems.Trannys and propshafts break.

 

[SY2455]

Plan on doing a tune-up every 4 month ( plugs, cap-rotor)(wires once a year) Do your oil change every 2,500 miles & trans, diff ( front & rear) every 12,000 miles. The last 4.3 I ran lasted 320,000 miles before my son wreck the truck it was in, so I remove the engine & am putting it in a 88 S-bed S10 with a 5 speed just to see how long it will last. You should know that the engine still doesn't burn any oil at all between oil changes & still has 40lb oil press at idle (hot) 65lb oil press going down the road. On this engine I did a tune-up once a year on everything because it's not a turbo. The engine still got the same mpg as the day I first did a engine swap 17 city & 22.5 hwy & would smoke the tires in first bark'em in 2nd & sometimes in 3rd with 3.73 posi gears, However gas mpg would drop when I drove like that...