- Hey Scotty, love the videos. I have a 1993 Ranger 3.0l. The motor locked up and turns out all the rod and main bearings were shot. Replaced all of them put back and it still knocks like a diesel. It still has original pistons and rings, timing chain and valve train but has new water pump, fuel pump, oil pump, head gaskets, ignition coil, distributor cap and rotor, and spark plugs and wires. How much life do you think is still left in it?
How much life do you think is still left in it?
Did you check bearing clearances and crank wear when you replaced the bearings? If the engine is knocking its lifetime is measured in minutes.
So ur saying even with good oil pressure and not overheating it still doomed?
If you're hearing a bottom-end knock, yes. It means you have a bad bearing and it's going to let go on you sooner rather than later. Now if you can find the knock is coming from something else, like maybe the valve train, it's a different story. (Valvetrain noise like from a collapsed lifter is slower than bottom-end noise since cams run at half crankshaft speed.)
If you have a smartphone, there are apps you can use to listen with the microphone and analyze the frequency content of sound. Compare it against engine RPM and it can help you narrow down the source.
I checked the main and rod journals and matched them with my hanes repair manual for 91-11 rangers and there a match. Checked the journals and cap to journal clearances
Sorry you don't like the answer (down vote), but the fact remains that if you are getting a lower end knock from that engine then the repair was not effective and the engine is going to grenade soon.
I checked the main and rod journals and matched them with my hanes repair manual for 91-11 rangers and there a match. Checked the journals and cap to journal clearances
My bad the down vote was an accident I'm new to the layout on the page. So ur saying even with good oil pressure and not overheating it still doomed?
Makes sense, I'll take a closer listen to it. Thanks
@jkc97 You can find examples of bottom-end knocks versus valvetrain noise on youtube.