[White90GT]

I'm having a TF Street Heat H/C/I kit installed and my mechanic suggested that while he had the top half of the motor torn off it would be a good idea to replace the main bearings and piston rings since after he's done I might find my foot depressing the gas pedal a little more frequently.

Now, the main bearings come in sets of 5. Is 1 set enough? Also I noticed there is different groove types, 1/2, 3/4, and Full groove. Which groove type should I get or will any type work?

The piston rings are confusing me a little bit more. There are lots of different sizes and I need to know what size for stock pistons.

It's being worked on right now and it's gonna be costly but for around $100 he figured it might save me some money down the road if we can prevent any oil issues now. Any help is appreciated and thanks in advance.

[Blade10]

Why not measure the bearings and see if they need replacement? But he is right, its cheap insurance.

A leakdown/compression test before tearing the motor apart would have helped you to make a choice on the rings (as far as doing them goes.)

1 set of main bearings is enough. There are only 5 main bearings. Maybe you are thinging the connecting rod bearings as well?

Sorry, I dont know about the groove type. The bearings I have used in the past always had one groove.?

Blade

[White90GT]

Anyone think this is necessary? The motor only has 50k on it. It's costing me a large chunk of change to have the H/C/I installed and if the engine needs it I will do the bearings and piston rings but, at this point if I can keep the cash for this extra procedure in my pocket I would like to do so. Trying to find out if it's necessary or if the mechanic is trying to squeeze some more coin outta me.