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L16 block L20 head?


savageP521

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None at all a perfect fit. HOWEVER...

 

The 210 L16 head has a combustion chamber size of about 38cc. The head ID is cast into the bottom outside edge, below the #1 and #2 spark plugs and will likely say MADE IN JAPAN   210. When you squeeze the volume of air in an L16 cylinder into it you get a compression of about 8.5 to one. All L20B combustion chambers are much larger at about 45.2cc and when the L16 cylinder volume is squeezed into a larger space the compression ratio is lowered. In this case down to 7.72. This lowers the engine's efficiency and it will lack power even though the L20B head breaths better. There are rare closed chamber heads with 41cc chambers which produce a compression of 8.21 but it is still a loss.

 

I suppose you could have the L20B head milled down by 1mm. (0.040") This would remove 5.4cc from the combustion chamber volume and get the compression closer to normal. A thinner head gasket would also help although I don't know where you would find such a thing. Milling the head will introduce chain slack as the cam is now closer to the crankshaft. You can counter this by moving the sprocket to the #2 or #3 dowel hole or use cam tower shims.

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The U67 and the W58 heads need a cylinder that is at least 82.55mm wide for the valves to fit down into. The L16 is 83mm. This is very close and the cylinder will be shrouding them at the least.

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The U67 and the W58 heads need a cylinder that is at least 82.55mm wide for the valves to fit down into. The L16 is 83mm. This is very close and the cylinder will be shrouding them at the least.

Yup. The edges of the bores had knicks where the intake valves hit. Good thing they didn't bend.

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when i got my truck it was tapping loud wouldnt stay running had no power i barely made it home. i pulled the valve cover and found rocker arms laying in the top of head. i had valves that wernt even opening  i mcgyvered them  back in place and did a valve adjustment.. ran ok but need a new head. i was trying to burn  out on a dirt road and she took a dump on me and started backfireing out the carb parked it two years later i blew up the trans in my toyota corrolla and now im mobbin my chevrelegs because both my vehicals are down. i need to get my truck going.asap i will post head numbers and picks shortly im going to pull the valve cover real quick and see what happened im guessing rocker arm is wedging a intake valve open. fml i love that truck

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