Cool stuff I learned tonight

["Brian Honnold" <bhonnold@pac-cap.com>]

<x-charset iso-8859-1>For those of you who care:

I am currently working through the mechanics of fitting a 16V head to an ABA
"tallblock".  the major obstacle has been the oil pump.  Seems that the 16V
oil pump is quite a bit different than the 8V in the way that it is driven.
The 8V is driven by the distributor which is driven by the intermediate
shaft.  The 16V is driven by a little gear that is driven by the
intermediate shaft.

Of course, the 8V and 16V intermediate shafts are totally different.
Tonight I swapped the 16V intermediate shaft into the ABA block and started
learning about oil pumps.  My donor block is an 87 1.8 16V block so I knew
right away that it had the cheesy old style oil pump with the 30mm gears.
What it did have was the correct drive gear on the top and the correct drive
gear shaft length.

So what did I do that is so cool...........

Took the drive shaft part out of the 8V pump with the 36mm gear on the
bottom, and the 16V drive shaft part with the 30mm gear.  It turns out that
if you put the gear carfully in a vice and bang the shit outta the shaft the
parts separate, leaving you with a perfect 36mm drive gear to put on the 16V
shaft.  I simply pounded the right parts back together, put the pump back
together and it fits.  Just barely clears the end cap of the number 4 rod
bearing though so I may have the shaft clearanced a little.  The 8V shaft
has a small notch machined in it for clearance.

It is all very tight with no lash gap at all in the pump.

Just thought I'd share.

Brian Honnold
'78 thousand MkI parts all over my garage.


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