Crimped power steering hose clamps

[D S.]

According to an NCRS member who owns a 1972 Corvette says she has found the correct crimped power steering hose clamps and the tool to crimp them from Glazier Mustang Barn. I thought the only thing available was the Wittek #23 hose clamp.

Scott Sims
Texas Chapter

[Chuck S.]

Re: Crimped power steering hose clamps

According to an NCRS member who owns a 1972 Corvette says she has found the correct crimped power steering hose clamps and the tool to crimp them from Glazier Mustang Barn. I thought the only thing available was the Wittek #23 hose clamp...

Scott, the clamp on the PS pump is actually a crimp type clamp by late 70. The configuration of the clamp is the same as the band clamps used to retain CV joint boots, so I wouldn't be surprised that she has found them.

I believe the crimped clamp is on the low pressure or suction side of the pump. The high pressure hose has a threaded connection.

[D S.]

Re: Crimped power steering hose clamps

Thanks, Chuck. If anyone is interested here is the site link:
http://www.mustangbarn.com/contact.html

[Edward J.]

Re: Crimped power steering hose clamps

Chuck, the crimp sytle clamps is late production ? 76/77? is this used on the S/B ? Thanks Ed

[D S.]

Re: Crimped power steering hose clamps

Am I correct to assume that the crimped power steering hose clamps were used on '68-'72 Corvettes?

[Edward J.]

Re: Crimped power steering hose clamps

I think the post of chuck saying late, had me questioning, I just brought a clamp for my 72 and its the type with a band and nut and bolt through it, which I would rather know now. since Im replacing the return hose, in spring.

[D S.]

Re: Crimped power steering hose clamps

I think the post of chuck saying late, had me questioning, I just brought a clamp for my 72 and its the type with a band and nut and bolt through it, which I would rather know now. since Im replacing the return hose, in spring.

Most people I know have been using a Wittek #23 hose clamp for the power steering hoses. I was under the impression that the correct crimped hose clamps were unavailable. Upon learning that the crimped hose clamps are available has me second-guessing, too.

[Chuck S.]

Re: Crimped power steering hose clamps

Chuck, the crimp sytle clamps is late production ? 76/77? is this used on the S/B ?...

Sorry, what I meant was that prior to late 70, I didn't know what was used, but that I would expect this style clamp to be used on late 70, and later cars as well. According to my recall, I observed the crimp type clamp on my late 70 base engine PS pump. Finding this clamp caused me some anguish at the time, because it looked "special" and I knew no vendor was selling any such clamp. That was before I knew that every front wheel drive vehicle for the last 30 years had CV joint boots retained by the same type of clamp.

The 70 AIM page showing the clamp is UPC N40, Sheet A2. The clamp is called out as Item 2, Part No. 5690389, with a Note "E" that says "See UPC 0 General Instructions for clamping". The title block shows that a new clamp part number, and Note E, was added to the drawing 11-18-69. Very early 70s may not have had this type clamp, but it definitely would have been in place by late 70.

If you go to AIM page UPC 0 (General Instructions), Sheet A7, you will see there an illustration and instructions for crimping a hose clamp of just this type. Since I did not observe another application of this type clamp on the car, I assume this is the general instruction to which Note E refers. I doubt that special instructions would have been required for a screw type clamp in use for decades.

Although I found this clamp on a base engine PS pump, I doubt that the use of this clamp was influenced in any way by engine option. I haven't combed the AIM pages of the other engine options, but unless a different clamp type is specifically called out by the engine option pages, the crimp type clamp would have been used for all engine options.

[Terry M.]

Re: Crimped power steering hose clamps

Sorry, what I meant was that prior to late 70, I didn't know what was used, but that I would expect this style clamp to be used on late 70, and later cars as well. According to my recall, I observed the crimp type clamp on my late 70 base engine PS pump. Finding this clamp caused me some anguish at the time, because it looked "special" and I knew no vendor was selling any such clamp. That was before I knew that every front wheel drive vehicle for the last 30 years had CV joint boots retained by the same type of clamp.

The 70 AIM page showing the clamp is UPC N40, Sheet A2. The clamp is called out as Item 2, Part No. 5690389, with a Note "E" that says "See UPC 0 General Instructions for clamping". The title block shows that a new clamp part number, and Note E, was added to the drawing 11-18-69. Very early 70s may not have had this type clamp, but it definitely would have been in place by late 70.

If you go to AIM page UPC 0 (General Instructions), Sheet A7, you will see there an illustration and instructions for crimping a hose clamp of just this type. Since I did not observe another application of this type clamp on the car, I assume this is the general instruction to which Note E refers. I doubt that special instructions would have been required for a screw type clamp in use for decades.

Although I found this clamp on a base engine PS pump, I doubt that the use of this clamp was influenced in any way by engine option. I haven't combed the AIM pages of the other engine options, but unless a different clamp type is specifically called out by the engine option pages, the crimp type clamp would have been used for all engine options.

While CV joints use this style of clamp, there is a huge difference in size between a typical CV joint clamp and the return hose clamp we are talking about. On the other side of that discussion, I would not be surprised this style of clamp was used on power steering return hoses for many GM (and obviously other car manufacturers as well) car lines of the era. I would think other restorers of late 1960 through the 1970s cars would also be looking for a source for these clamps. Some besides our Mustang friends may have found the source.

[Edward J.]

Re: Crimped power steering hose clamps

I had a 05 dodge ram truck that I recently had a p/strg.line leak and it was of that style clamp , maybe I'll look at that clamp closer and see if its that same size as the corvette. Dodge may sell them.( don't hold it against me Terry who knows maybe you'll see the car a a national)

[Terry M.]

Re: Crimped power steering hose clamps

I had a 05 dodge ram truck that I recently had a p/strg.line leak and it was of that style clamp , maybe I'll look at that clamp closer and see if its that same size as the corvette. Dodge may sell them.( don't hold it against me Terry who knows maybe you'll see the car a a national)

I eavesdropped on a conversation in Florida between a Bowling Green plant engineer and a recently retired GM engineer whose field was fasteners. To cut a long story short, at the start of C6 production to get or keep the BG line moving the fastener engineer raided a Ford assembly plant for fasteners to send to BG -- so the first three or four months of C6 production used some Ford fasteners for the undercar close-out. He didn't say, but I would doubt they looked much different than the fasteners sourced by GM.

So don't worry about where the clamp comes from. Do you know where most of the Dill valve stem caps come from? About where your clamp may come from.

[Chuck S.]

Re: Crimped power steering hose clamps

While CV joints use this style of clamp, there is a huge difference in size between a typical CV joint clamp and the return hose clamp we are talking about. On the other side of that discussion, I would not be surprised this style of clamp was used on power steering return hoses for many GM (and obviously other car manufacturers as well) car lines of the era. I would think other restorers of late 1960 through the 1970s cars would also be looking for a source for these clamps. Some besides our Mustang friends may have found the source.

Agree...a CV joint boot may be 4" in diameter on the big end, and the PS hose only 3/4"-1" in diameter. But, on close examination, I could find no difference in the configuration of the crimped portion.

I haven't determined if those CV joint bands are commonly available in different lengths, but I assume that they are if they are being used in production and service. If I didn't have the Mustang revelation now, I would probably start looking for short length versions, and/or trim the length and try wrapping them on an appropriately sized mandrel. In either case, I think we'll have to be happy with just matching the clamp configuration...any stamping on them as previously described by Paul Oslansky would be history.

https://www.forums.ncrs.org/showthre...75896&uid=1841

(PS: Scott, I'm thinking you've gotten yourself into an intellectual debate with a girl, and took your lumps as we all have. HaHaHa... )

[Michael C.]

Re: Crimped power steering hose clamps

Scott,

Earlier this year I tried the Mustang Barn site to no avail. I ordered what looked like a "correct" p.s. hose clamp, and I was sent the screw-type clamp, just like what you see in the Corvette parts catalogs.

I was in my garage pondering the problem, and found a correct clamp on my garden sprayer hose! It is the correct configuration and size, too. My sprayer was purchased from Ace Hardware a few years back, and I have the specification manual pictured. It appears you can order just the hose assembly as well, if you don't need a new sprayer. The clamp can be easily removed and used on your p.s. pump hose, and you can use that screw-type clamp on the sprayer. You can find a crimp tool for them at any auto parts store, similar to what they use for the CV joint straps. This clamp has worked perfectly on my '72 return hose. If you have found another solution, I'd like to know about it.

Thanks,

Mike

Clamp_0002.jpgClamp_0001.jpg

[Paul O.]

Re: Crimped power steering hose clamps

Here are a few photos of what is called a pinch clamp and the tool used to compress it. Plus a photo of my original 1971 hose and clamp


Paul 18046A-2000-2.jpgimages.jpgPS hoses 008.jpg

[Paul D.]

Re: Crimped power steering hose clamps

I'm sure there are some subtle differences to factory clamps, but I use clamps very similar to the one shown on Paul's original hose on air hoses I make up at work. The clamps and crimping tools are available from McMaster-Carr. I think they are by a company called Oitiker (sp?). http://www.mcmaster.com/#standard-hose-clamps/=flh64j Chip.