metal-x

I know this has been covered before but I really need to know how to break in my new bottom end and clutch Im picking up the car tonight here is the run down

B18C block .20 overbore
New bearings, water pump,head gasket,timing belt
JE 9:5 pistons
ACT MD clutch
Clutchmaster Flywheel

DSF

http://www.mototuneusa.com/break_in_secrets.htm

Done it this way on the last 2 rebuilds (diffenent engine/cars). No complaints so far

sporkcrx

Never broke in my rebuilt engine. Stock internals though, if it makes a difference.

boosted hybrid

Run SAE 30 wt oil for the first 500 miles of the engine. Change the oil and filter after the first 500 miles, then fill the engine with sythetic of your choice.

Upon start up of the engine, let the engine idle around 2-3K to seat the rings for approx 20-30 minutes. Drive the engine under no to semi load conditions for 50-100 miles. After 100 miles drive the car with full load/boost.

I use and recommend magnetic drain plugs for the oil pan, they catch a surprising amount of metallic flakes inside the engine for the first couple 1,000 miles after rebuilds.

If the clutch is a sprung disc, drive the clutch around town for 100-200 miles of stop and go driving. This heat treats the springs on the clutch disc.

metal-x

thanks for the tips guys would you guys recommend Castrol GTX 10w 30 for the first oil change?

boosted hybrid

For the first oil that you put into your car use SAE 30 weight non detergent oil. The local autozone carries Shell SAE 30 ND oil, which stands for non detergent. Its important that you break your engine in with ND oil for the first couple hundred miles so that the bearings surfaces have oil worked into the grain surface instead of detergents. The ND break in gives the bearings extented life.

After you go 500 miles change with full sythetic, I use Mobil 1 10w-30.

metal-x

thanks