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Block differences?
Posted: Mon Aug 23, 2010 8:53 pm
by Lummy
I'm sure this has been covered before, but I couldn't find it...
I'm wondering what differences there are in the actual blocks between Starions, VR4, EVO, etc?
Cheers.
Posted: Mon Aug 23, 2010 9:28 pm
by YellowJA
Starion wide block, VR4 and EVO narrow block
Posted: Mon Aug 23, 2010 9:46 pm
by Lummy
Ok, focussing on the narrow blocks for a moment, are there any differences between any of the models?
What I'm getting at is...would the crank/pistons in my VR4 motor be interchangable with any other 4G63 block?
Posted: Mon Aug 23, 2010 11:08 pm
by redzone
6 bolt N/A blocks have oil squirter bosses, 7 bolt N/A blocks dont. otherwise there's not much difference between them..
Posted: Tue Aug 24, 2010 9:06 am
by dirtygalant
You can't use a 6 bolt crank in a 7 bolt block, and vice versa. The oil pump is different between 6 bolt and 7 bolt, as is the sump as the 7 bolt oil pump is shaped differently.
Posted: Tue Aug 24, 2010 8:52 pm
by Lummy
Ok, good info.
So, 7 bolt starts when? With the EVO engines?
Posted: Wed Aug 25, 2010 4:23 pm
by dirtygalant
Yep Lancer Evo 1 onwards, also RVR Turbos from 1993 onwards, and about end of '91/beginning of '92 is when the N/A RVRs went from 6 bolt to 7 bolt on their N/A DOHC models.
The HJ Galant 2.0L SOHC engines will be 7 bolt also.
Posted: Wed Aug 25, 2010 4:57 pm
by quest
my 6-bolt non-turbo block didn't have provision for the knock sensor to screw into either