Replacing all hose clamps - how to find sizes?

[V951S]

As I am sorting through the new-to-me car, I want to replace all the corroded-looking hose clamps (among many bits!) in my engine bay.

Bel-Metric seems like a good site for good prices and quality with the OEM looking yellow-zinc.

The 944 parts catalog just lists the part number and "Hose clamp". No sizing.

Can anyone give me an easy method of measurement of each hose-clamp so I can make a list of the correct sizes before ordering?

Thanks.

[icb]

Got a pair of calipers? Measure the outside diameter of the hose where the clamp sits and add 10mm for an old used hose or 5mm for a brand new one. Yes, you should use the hose clamps from Belmetric, they are the correct ones. You may not be able to get all the sizes you need in the yellow zinc finish, you may have to use stainless for the others.

[Ajay213]

The Porsche PET for the car has a list of every (replaceable) part in the car. So every bolt size, washer size, nut size, clamp size, etc. Includes the original part number, so if you ever have a hard-to-find part you can look it up as well - quite a lot of the small parts are still available from Porsche (but you pay for it compared to Bel Metric and others). I'm not sure if that is what you meant by the '944 parts catalog'?

This has a few of the PET catalogs, you need it for your year of car, and it will have all 944 types for the model year.
https://www.9xxteile.com/en/pet (hope it's ok to post a link like this). You can find them still on Porsche's website, but it takes 900 clicks in order to find them.

For instance, the clamp on my car (which isn't a turbo, different year, etc) from the heater core to the water pump says;
Hose clamp 23 - 35 - Qty 4

So you can cross that to BelMetric

[NCGermerican]

Note that many/most/ if not all hose clamps no longer come in yellow zinc. I’ve ordered a few Porsche clamps over the past year and they are all silver even with the proper part number.

[Tom]

Note that many/most/ if not all hose clamps no longer come in yellow zinc. I’ve ordered a few Porsche clamps over the past year and they are all silver even with the proper part number.

Those "Norma" clamps are now mostly stainless, which is good, but they don't take to yellow zinc. You are better off with SS, but if you want that yellow zinc look, you can still find them at places like BelMetric. You can get the sizes from PET as stated above, but also very easy to measure with calipers. Norma clamps are marked a hose size range, such as 60 - 80 (meaning the clamp fits a hose from 60 to 80mm). I shoot for the middle of the range. Buying them in the aftermarket costs a tiny fraction of the Porsche dealer price...

[Ajay213]

I also found this fastener company - https://www.newcoproducts.com - but I have never ordered from them, so no idea if they are good/bad/etc - but they have a few products Bel doesn't have and just another source in general.

But they also have Norma style zinc plated clamps - https://www.newcoproducts.com/index.php ... _1060_1066

And yes, I apologize, the new OE Porsche stuff is all stainless, even the non stainless hardware won't be zinc plated anymore - I believe it's for environmental reasons (it's not the friendliest stuff to use to do all the plating).

[V951S]

The Porsche PET for the car has a list of every (replaceable) part in the car. So every bolt size, washer size, nut size, clamp size, etc. Includes the original part number, so if you ever have a hard-to-find part you can look it up as well - quite a lot of the small parts are still available from Porsche (but you pay for it compared to Bel Metric and others). I'm not sure if that is what you meant by the '944 parts catalog'?

This has a few of the PET catalogs, you need it for your year of car, and it will have all 944 types for the model year.
https://www.9xxteile.com/en/pet (hope it's ok to post a link like this). You can find them still on Porsche's website, but it takes 900 clicks in order to find them.

For instance, the clamp on my car (which isn't a turbo, different year, etc) from the heater core to the water pump says;
Hose clamp 23 - 35 - Qty 4

Yes, I have a PET. (And thanks for the link!)

But for example, the hose clamps on this page (# 48, 49, 51, 52) are all listed as "hose clamp", or "clamp" in the PET with no sizes.

I have tried to cross-reference the part number online and found some links with sizes, but was hoping for a faster more efficient method to do a bulk order from Bel-Metric. (The dealer web-pages for the parts do not list sizes unfortunately.)

[V951S]

Got a pair of calipers? Measure the outside diameter of the hose where the clamp sits and add 10mm for an old used hose or 5mm for a brand new one. Yes, you should use the hose clamps from Belmetric, they are the correct ones. You may not be able to get all the sizes you need in the yellow zinc finish, you may have to use stainless for the others.

That's a quick & straightforward way. I will try that.

From the feedback on this thread, I will skip the OEM look and go for stainless then. Thanks.

[icb]

Looks like Belmetric has updated their line and shows all sizes in yellow zinc over stainless. Have at it.
https://belmetric.com/w2-steel-yellow-z ... ku=CR27YLW

[Tom]

Looks like Belmetric has updated their line and shows all sizes in yellow zinc over stainless. Have at it.
https://belmetric.com/w2-steel-yellow-z ... ku=CR27YLW

That's a new one for me. Thanks for posting! Best of both worlds.