69 power brake booster vacuum hose size

[Greg L.]

Would someone be able to measure the outside diameter of their original or CORECTLY repoped booster vacuum hose for me? For the life of me I can't find my "original" one and I need to know what the proper O/D is. I have two that will "work" but for some reason the O/D on them is of different size so I don't know which one to use....

Also as far as an original hose goes, do they have any significant markings or are they just plain black cloth reinforced hose?

[Jeffrey S.]

Re: 69 power brake booster vacuum hose size

Greg:
Tomorrow I will measure the hose on my '69. I purchased it from Dr. Rebuild and It appears to be as original since the original spring clamps fit perfectly. It does have markings on it and I will note these for you. It's dark, clod and snowing now and I would prefer to go out to the garage during the day.
Jeff

[Greg L.]

Re: 69 power brake booster vacuum hose size

Thanks Jeffrey, tomorrow will be fine.

I'm actually getting a small list of things that I need from Dr Rebuild and noticed his vacuum hoses with the printing on them. I was thinking of getting one of his hoses but then I started to wonder if all original hoses had printing on them or if just some did. If they all did then I'll just order one of his but if they didn't all have this printing then I'll just use one of the two that I have now.

Does anyone know if all 69 power brake vacuum hoses had printing or were some bare?

[Jeffrey S.]

Re: 69 power brake booster vacuum hose size

Greg:
The outside dimension of the hose is slightly larger than 5/8"- using digital calipers is read .652 or 21/32". It is marked in yellow "Swan Vacuum Brake Hose Co.". Hope this helps.
Jeff

[Terry M.]

Re: 69 power brake booster vacuum hose size

I have seen many early C3 vacuum brake hoses without an apparent marking. I'm pretty sure my early 1970 doesn't have any markings, but I would have to look to refresh my memory.

[Jim T.]

Re: 69 power brake booster vacuum hose size

Terry I thought I could save you a trip to your cold garage, mine is only 52 degrees now, however my original 70's power brake hose with original spring clamps shows no markings with just lifting the hood and looking down, just black rubber hose, but looking with a mirror there are yellow makings on the bottom side, did not see the words Swan Vacuum Brake Hose Co.
Not saying is was not on the full length of hose mine was cut from though, the yellow markings are of different letters and I did see 11/32. Slightly difficult to hold a flashlight, hold a mirror, and read the letters. If I was under the car I think I could see and deciper the letters looking up.