I installed  windage tray in my inline four. Used same bolts. Windage tray gasket was rubber or the like, and same thickness as stock gasket. 

Just for the rubber gasket I'd put one in .

Alistair

> On Nov 17, 2016, at 6:32 PM, Neil N <musomuso@GMAIL.COM> wrote:
> 
> Thanks Don and Ralph.
> 
> Don: saw your post about pan threads at aluminum seal carriers. Thanks
> for posting that.
> 
> On the topic, to anyone else installing a windage tray, the seal and
> pan combined obviously require a longer bolt. Something else for your
> parts list.
> 
> Neil.
> 
> 
> 
> 
>> On 11/17/16, Don Hanson <dhanson928@gmail.com> wrote:
>> 
>> Mine was single flat washers.  Be careful with the torque....
>> 
>> On Nov 17, 2016 4:37 PM, "Neil N" <musomuso@gmail.com> wrote:
> 
>>> This is for a diesel oil pan on a VW gas ABA inline engine. I'm
>>> replacing the bolts.
>>> 
>>> Does each bolt require a flat and "wavy" washer?
> 
> --
> Neil n
> 
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> 
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