Are there any upgrades for the LH6 engine?
Are there any upgrades for the LH6 engine? Below are more upgrades that will improve the performance of the LH6 engines. As we mentioned earlier, the engine came with AFM—which is known to fail. If your engine is in good running condition now, you can install an AFM disabler. If a lifter is already failing, it’s best to go with an AFM delete kit. What should idle quality be on LH6 5.3L engine? To maximize torque in the mid-range, manufactures close the intake valve at about 40 degrees (@.050 in.) after bottom dead center and alter the intake valve opening...