I gotta vortec 4.3 wanna swap with the newer ecotec pistons since they the same motors pretty much

Asked by Motorman123 May 05, 2018 at 05:29 PM about the 1998 Chevrolet Astro LS Extended AWD

Question type: Car Customization

Heard ecotec vortex vtec they all the same
motors I got all the parts outta all of them the
pistons are a little loose got the heads back on
was missing 3 of the 20 bolts but left them out
on the middle truck turns over but wont start I
know the bolts are missing but it should still run
right?

1 Answer
9,505

brotherben answered 5 years ago

They are not all the same. VTEC is made by Honda and has nothing to do with the other engines. ECOTEC and VORTEC made by GM are too different to interchange. If anything lines up or bolts together, your sensors would from that different engine would give readings to the main ECM that it can't compute. And also if the pistons are loose, throw that idea away and get pistons specifically for that engine. Throwing multiple separate engines parts together to make one functional one might work on older engines but since early to mid 90's parts are too picky to interchange between models and years.

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