EA82 mpfi heads >> markings

steptoe · Post by **steptoe** » Tue Jan 05, 2010 8:29 pm

one head has in the casting that appears next to the exhaust port, EA82 in bold characters 9mm high. The EA82 is underlined. On the top side (inlet) it has 5 JAPAN in the casting. Inside near the valve springs there is TK in a circle and a number 5.

Another head has EA82 no underline in 7mm high characters, JAPAN 3 topside, TK 3 inside.

Another is JAPAN 7, TK 7

Yet another is JAPAN 6, TK 6

Is this simply different casting factories or something to do with the rumour that there was three or so different EA82 mpfi / turbo heads on these now not so popular dinosaur engines?

Gannon · Post by **Gannon** » Tue Jan 05, 2010 10:34 pm

Yep the different casting styles differentiates between the different revisions.

The first series of heads had issues with cracks between the valves, so in the second revision, they thickened the area below the exhaust port.

steptoe · Post by **steptoe** » Wed Jan 06, 2010 8:07 am

Soooo..... any idea of what markings are what?

timmo · Post by **timmo** » Wed Jan 06, 2010 11:09 am

Roughly 1st gen is 84-87, 2nd gen 87-89 3rd gen never fitted from factory (only available to retro-fit)

steptoe · Post by **steptoe** » Wed Jan 06, 2010 8:58 pm

Great presentation Timmo. Thanks

nncoolg · Post by **nncoolg** » Wed Jul 04, 2012 8:26 pm

Here are some photos of the 3 different head revisions to compliment the above chart:

Gen1:

Gen2:

Gen3:

steptoe · Post by **steptoe** » Wed Jul 04, 2012 10:59 pm

Now, to see you slice the GENIII's up to show us the differences

timmo · Post by **timmo** » Thu Jul 05, 2012 8:58 am

I am still running first generation in my EA82T, anyone else?