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Quieting down a front fuel pump

If you want to quiet down the buzzing of a front Bosch fuel pump you can remove the original front pump mount and cram the pump up in there between the cross member and gas tank with one of these Porsche rubber covers on it and hose clamp it in place.
It just fits and helps muffle the buzz.

I think the rubber cover was made for the 964 or later models. I got it from a dealer in Oregon for around $25 and could dig up the reciept for the part number if anyone wants it.
I have a bosch 044 pump in there and it fits like a glove
Chris at Turbokraft posted about it a while ago and thats how I learned about it.

Old 02-20-2014, 03:04 PM
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Yeah, youre going to need to post the part number.
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Old 02-20-2014, 03:16 PM
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That's pretty cool, pn please.
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Old 02-20-2014, 03:57 PM
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There are two parts to it.. the rubber cover the pump fits into and the rubber end cap that pops on to the end to completey enclose the pump in rubber. The wire terminal post holes are in it and there are hex cut holes in each end that fit the inlet and outlet of the Bosch 044 pump like it was made for it.
It looks like it was originally made for the 964 and 993.

The rubber cover is 965-356-391-01
The rubber end cap is 965-356-389-00

Pelican doesn't stock it but they can special order it and the price is marked up a lot. I bought it from Sunset Imports a Porsche Audi dealer that charges 15% over their cost in Beaverton Oregon so their price is much lower. I paid $24 plus $7 priority mail shipping for it a year ago. You can call them and ask what it cost now and order it over the phone.
Use google for their phone number. I probably shouldn't post it here.
Old 02-20-2014, 04:27 PM
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Thanks!...good info.

Rahl
Old 02-20-2014, 04:55 PM
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I have 2 of those noisy things. 1 front, 1 rear. But, kind of like hearing them so I know they're working.
Old 02-20-2014, 06:59 PM
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Prrrrrreeeeeettttycool. Thanks!

BTW, that's about a clean car... garage queen or just redone?
Old 02-21-2014, 08:46 AM
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Repainted in Standox around 6 years ago and the interior is in nice shape. I removed the entire interior 3 or 4 Florida winters ago and stripped all the leather and recolored it with color plus products in the original Linen color.

Then took the carpeting and washed it in tide laundry detergent in the bathtub twice. The water turned grey from all the dirt. I put some of the smaller carpet sections in the washing machine on gentle cycle.

Previous owners kept it in a garage so that helped keep the dash nice and the glove box door straight
It's not a garage queen because I don't have one.

It's really dirty right now and covered with cat stuff and needs a wash.
Old 02-21-2014, 09:16 AM
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Good idea, Jim.

Blast from the past....I used to live in Beaverton a zillion moons ago, back when my daily driver was a '73 MGB which I owned and operated for 18 years before T-boning a soccer mom at a stop light in Chicago. Wonderful memories (except for boning the mom )

So, los gatos are still giving you crap?
Outdoor car cover cat repellent?
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Old 02-21-2014, 09:43 AM
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Yeah there's no training feral cats. You can scare them off and they just come back when you're not looking.
I don't put my car cover on it anymore because they keep pissing on it and clawing it to shreds.

cats just do what they want when they want, kinda like. . . .
Old 02-21-2014, 10:07 AM
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Quote:
Originally Posted by Tippy View Post
I have 2 of those noisy things. 1 front, 1 rear. But, kind of like hearing them so I know they're working.
i like to hear the quickbuzz when i turn the key on, aftert hat i cant hear them.


does that make them run hotter?
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Old 02-21-2014, 10:19 AM
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Quote:
Originally Posted by T77911S View Post
does that make them run hotter?
Yes it does but it helps muffle the buzzing.

The fuel flowing through them is what lubricates and mostly what cools them but after a while all the fuel gets warm from going around and around combined with hot asphalt under the gas tank, etc.

I have an 044 in the back too and it doesn't buzz nearly as loud as the front one does.
So... the rubber cover is on there and helps muffle the noise.
Old 02-21-2014, 10:34 AM
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Yep. My front is far louder than the rear.
Old 02-21-2014, 05:27 PM
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Well it's good to know it's not just mine that does that. My rear 044 pump isn't bad at all. Maybe the front one is doing most of the work and thats why it's noisy.
Oh well... the rubber cover helps a lot and there's no shortage of fuel pressure for the old CIS.
Old 02-21-2014, 06:27 PM
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Probably a simple resonance thing. The frequency of the pump matches the resonance of the sheetmetal it's attached to.

Just a thought...
Old 02-21-2014, 07:19 PM
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