Modern Vespa

Does anyone know why the water pump cover is plastic here in the USA. But the same part number is aluminum in Europe.

I found this out the hard way easing the little hose off the pump and the nipple broke.

So I ordered an aluminum cover from Germany for €29 versus almost $50 for plastic here.

Just wondering

The plastic one is an old version, the new one is metallic. Here's the correct part number for metallic one: B019381 (I know, looks irregular for Piaggio parts, but.)

Not sure for USA. Mine is one of the last 2022 HPE USA version and is plastic and the part number says 1A011109. Can't find a good picture to compare if both are exactly the same (1A011109 and B019381)

The aluminum one is a direct replacement? Make sense to change it as I do the coolant fluid change?

Not truly direct, and I dunno about HPE. I know that an old plastic version with "wire-like" gasket is directly replaced with metal one with flat gasket. But maybe there was also a plastic one with flat gasket.

So let me update my water pump update. So the part number that my both my covers have is 1019381. Other than a grove cut for a seal and material they are identical.

With no grove for the seal ring I bought, I used an industrial Anaerobic flange sealant that exceeded the temperature and pressure requirements of the scooter

It's together and water tight, Now I am just waiting for the snow to stop falling and I can ride my MP again.

Hopefully later in this week

Aluminum for the win. Plastic gets fragile and brittle with age/heat cycles. Plastic also distorts and warps.

Manufacturers are switching over to plastic just because it is cheaper to make but at the cost of durability.

BTW, the upper hose is not positioned correctly. It needs to almost touch the line cast into the cover.

not on the older types 500 the hose is to short

The newer ABS/ asr models got a longer hose

Iff the hpe comes with a plastc one in the US its a rebatched old stock one

Piaggio suplies the alluminium one from model year 2014 ABS/ASR models in Black and and silver color

So you say that I can change it for aluminum without problems in a HPE, exact match?

Did you know the part number for the black aluminum one? as all I can see is one part number but never a variation that indicate black or silver.

Thanks in advance

yes but buy also the gasket

Anyone know the part number for the black aluminum one? as all I can see is one part number (B019381) but never a variation that indicate black or silver.

Thanks in advance

1A011109 should be a black one 60 euro

B019381 is a silver one 31 euro

The problem is that the 1A011109 is plastic 😟

nope its a black alluimium one

Thanks, very appreciated

Sorry to resurrect an old thread, but does anyone know if the metal water pump cover P/N B019381 will fit on a 2008 MP3 500 engine? If so, where can I buy one here in the US? The prices from overseas is fine, it's the shipping that is a killer.

And don't forget the Trump circus tax (aka tariff).

Make sure you order the correct metal gasket (later housing) or the O ring (earlier housing)

No goop, no RTV and make sure the mating surfaces are hospital grade clean

You might consider ordering a 3D printed part if you cannot obtain one due to shipping costs or availability.

3D printed materials can tolerate some pretty high temperatures these days with the right base materials. You would need to submit a model or possibly mail them the broken part to copy. These aren't the 3D printed kids toys, these can be durable high strength items made to order.

Just search Google, there are about a dozen in the SF Bay Area, Here are a few that I found that can 3D print high temperature plastics.
https://jinxbot.com/
https://prtwd.com/3d-printing-service-san-francisco/
https://identify3d.com/


Failing that, you can have a part machined for you, it does not have to be a perfect match, it just has to have two separated channels to make the coolant connections.

I just took a closer look at mine and while it's black in color, I'm thinking it's metal and not plastic. When I touch it, it's cold to the touch (plastic feels different) and when I tap it with something metal it sounds metallic. It's not broken or anything but I just don't like using plastic for certain parts of an engine. Guess I'll find out for sure when I tear down the engine soon to replace the top end. Thanks for the help guys.

Oh, and pinhead, I have a couple of 3D printers that are capable of printing industrial grade filament if need be, but I prefer metal for this application anyway.