4ac cylinder head on a 3ac block?

Chevro · Post by **Chevro** » Mon Oct 06, 2008 9:39 pm

Is it possible? Has it been done? Is it worth it?

Thanks

-Chevro

GTSSportCoupe · Post by **GTSSportCoupe** » Mon Oct 06, 2008 9:53 pm

The only difference between the two blocks afaik is the cylinder bore. Same chunk of iron otherwise.

Neu · Post by **Neu** » Mon Oct 06, 2008 10:33 pm

Yeh, it can be done.

It's pretty common to switch heads on toyota engines, the R series do it all the time. 22r block, 20 r head gasket, with an 18r head gasket, raises compression and the engine runs pretty well.

Typrus · Post by **Typrus** » Wed Oct 08, 2008 12:06 am

They are identical heads according to my super-accurate side-by-side-mo-tron comparisons. Lol. I saw no obvious differences.

Post by **Petros** » Wed Oct 08, 2008 11:10 am

are the valve head diameter the same too? It would be great if the heads fit but the 4a head had bigger valves.

Typrus · Post by **Typrus** » Wed Oct 08, 2008 12:37 pm

Part no. V5107 and V5106, int and exh respectively on 3AC... and 4AC. Same part number, same part, no size difference.

Chevro · Post by **Chevro** » Sat Oct 11, 2008 11:41 pm

So, it sounds to me like it can be done, but there's no reason for it.

Thanks

Tercel4WD.com

4ac cylinder head on a 3ac block?

4ac cylinder head on a 3ac block?

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Re: 4ac cylinder head on a 3ac block?

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Re: 4ac cylinder head on a 3ac block?

Re: 4ac cylinder head on a 3ac block?