The '88 fuel tank might have filter screens but won't have a "factory"
pre pump filter. The Bosch pump should have a relatively fine mesh
screen inside the pump at inlet.

Possible points where debris might enter fuel tank:

- failed tank seals
- failed seal at expansion tank(s)

ID of nipples from the expansion tank might clog before allowing a
significant amount of debris to enter the fuel tank. As a mild WAG,
water getting in via the expansion tank seals would be the bigger
offender.

Neil.

On 8/25/20, Jack R <jack007@comcast.net> wrote:

> Hi Matt,
>
> If you are hearing fuel pump noise, it usually results from a clogged fuel
> filter... or crap that got into the pump.

-- 
Neil n

VE7TBN

1988 Westy 50º ABA swap: https://tinyurl.com/yap5hpwt

1981 Westy 15º ABA swap: https://tinyurl.com/y9n4xob8

VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>