Detailed Engine Specs

Have you always wanted to know what RB20 components weigh? Yeah I didn't think so, but here are the weights of some RB20 parts. I had a few engines apart and was just curious of the raw weight of some parts. I took measurements from several examples of each part and calculated the average and a +- span. These are used parts so weights will not be exact as they were from factory back in the day.

Short Block (w/ pistons installed, no pumps, no oil pan, etc):

~ 93 kg / ~205 lbs

Assembled Head (w/ valve train, no cam covers, manifolds, etc):

~27 kg / ~61 lbs

Bare Block (no girdle, no crank, no bolts, etc):

OEM Used - 53.1 kg / 117.1 lbs

Head (w/ valves, springs, retainers, cam caps, cam bolts):

OEM Used -  21.5 kg +- 0.13 kg / 47.5 lbs +- .3 lbs

Pistons:

OEM Used 78mm bore - 312 g +- 2 g / 0.69 lbs +- 0.004 lbs

OEM New 78.5mm bore - 319 g +- 0 g / 0.7 lbs +- 0 lbs

OEM Used Wrist Pins - 104 g  +- 0 g / 0.23 lbs +- 0 lbs

Con Rods:

OEM Used  - 595 g +- 5 g / 1.31 lbs +- 0.01 lbs

Crankshaft:

OEM Used -  18.5 kg +- 0.1 kg / 41 lbs +- .2 lbs

Crank Girdle:

OEM Used -  9.4 kg +- 0 kg / 20.7 lbs +- 0 lbs

Camshaft:

OEM Used -  3.1 kg / 6.8 lbs 

OEM Camshaft Specs (Intake/Exhaust):

Redtop Cams - 248/240 - 7.8mm/7.8mm

Silver Top Cams - 240/240 - 7.8mm/7.8mm

OEM Head Gasket Specs

OEM Nissan (79mm x 1.2mm) - PN: 11044-58S01