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EA 71 question


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Is there any difference in the EA 71 block. I have 2 with the engine stamping EA 71 on the drivers side of the engine and one with it on the front. Why is this? If there is a difference can things like heads be interchanged between the 2 different blocks?

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One with EA71 on the driverside is the older gen1 engine.

EA81 stamped up front next to the distributor is the later model engine used from 80-87. Other than some of the emissions stuff, I believe you can interchange them. With respect to the water pump and crossover tube of course.

 

I believe later EA71s had larger bearing journals, correct me if I'm wrong.

 

-Mike

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....but,if you use two different style cases you're going to run into needing to swap the air piping or at least the fittings for them.

 

I'm pretty sure the change was in mid-'78.They went to a wider case with an in-block water exchange.

 

How does the water passage look on all three engines?Are they the same?I'm guessing they're not.

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Yeah my buddy's ea71 has a deeper sound.. he hasnt put a weber on it yet, the only carb mod he did, was mess with the secondary so it opens at about 1/4 throttle. And with the cherrybomb it sounds pretty deep like some good power.. and Theres no emissions :)

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Ok maybe one of you can answer this then. Electronic distributors came out in the middle of the 78 model year if I understand right? So points type distributors would be in the engines with the casting on the side right? Both of my engines that have the casting on the side have electronic ignition, with a electric pick up rather than points but the engine with the casting on the front has a points type distributor. Wouldn't the electronc distributors make these the later monel engine?

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Electronic Ignition was an option back in 78 & 79. The book says california models came with it, but the only early ea71 I ever got with electronic ignition came from another state. Starting in 1980 with the fat case engine, I am pretty sure 90% came with electronic, even though points were still available thru 82 even on the ea81 engines.

 

-Mike

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