Trying to replace a brake hose. I have bought two brand new ones and I can’t blow thru either one.This can’t be right? I did an internet search and one spot said that is right. Comments?
Are you using compressed air ? Remember brake pressure is in the hundreds of lbs, but you should see daylight through them when laid in a piece of angle iron .
Andy, a hose should allow flow in both directions. You know that. You didn't provide a part number, application, or who sold it. We can guess any number of reasons for the issue, but it comes down to a brake hose that you can't freely blow thru in both directions isn't right. If it has some sort of residual pressure valve that may explain it, but without more info we are not able to advise.
The app is a 99 GMC Sierra 1500 with the 5.3 engine. It is a rear brake hose. One came from O’Rielly’s and one from AutoZone. I have anther I am going to pick up from NAPA. The O’Rielly part number is BH381272. Neither one will flow. This for my roadster.
Thanks, sorry if that came off as unhelpful. The horse's mouth. https://www.raybestos.com/brake-hydraulic-hose-bh381272.html Certainly doesn't indicate any reason to have a standoff of any sort. I know it's fashionable to pick on the country of origin, but I have a feeling the brass T end wasn't machined fully. Could you run a thin wire from the straight end thru and check for it to extend into the T end? Might do this at the store when returning. I followed a trail to OE numbers and that sure is popular and has been superseded MANY times. http://oemcats.com/oem-parts/21999531.html
Over crimped ? Miss machined . Slide a coat hanger threw & see . Also Some need scan tool (99abs)to bleed , & some you can out smart to bleed with out scan tool .. Should be able to blow air threw hose when in Hand .
Thanks for the suggestions! I did get a length of welding rod and tried to shove it thru. It stoppedy at the T fitting crimp. I jammed it in a few more times and it ended up going thru. I can see the wire thru the T ports! It flows fine. I did not see anything come out. I am good to go. I just need to return all the extra hoses.
They have "flap" in the hoses. It is reasonably common. They are a cheap but vital component, don't even risk the cleaning process Send them back and get new ones They don't see 100's of lbs on return. If you could get fluid down them, the brakes would stay locked on
I was working on One few days ago, Abs Light on for year or so , My self could care less about Abs working , On Gm hard lines rusting out @ plastic clips , after fixing hard line & swapping the OEM metric fitting to new 1/4 hard line went to Bleed brakes with scan tool , would not allow because code , tried few other things , So I turned power Key off was able to bleed brakes old fashion way , Worked for me , & honestly on this Gm brakes where better pedal feel not spongy like since purchased new. 255 thou miles
I wonder if the manufacturer tested the assembly for leaks and whatever the test fluid was had solidified at the fitting and blocked the low pressure flow? Seems odd that more than one hose was blocked without tracing the problem back to the factory. Maybe a bad week at the Dung Ho Brake Hose Factory?
Odd! Years ago I did have a brand new GM LT1 pushrod that had an inserted tip that did not get drilled through fully.
You can argue all you want to save face and win the internet argument, but I was talking about common sense safety here [somebody else's] That being said....... I'm done with responding to brake clusterfuck threads [Most accidents from ignorance / stupidity won't happen on my backyard ] You were referring to pressure in the brake hose. But they flow both directions. If the hose needs more than 15 psi to get flow through it , it has a blockage. A lot of cheap manufacturers only pressure test them ,usually incorrectly by blocking one end and pressurizing the other end [a blockage will show up as a pass because it holds pressure] The correct method is to pressure test with a gauge at each end [you block flow at one end and pressurize the other, then reverse the process] But this is usually done by custom hose manufacturers [not outsourced manufacturers]
Andy, I've never shook your hand, but you are a HAMBer and that's good enough. Please make sure any obstruction that was in there is gone. You don't want it to take a set out there on the road. If that's huffin' on it like the Harmonica player in J.Geils (yes, I know his name) or runnin' a speedo cable up and down a few times, make sure it wasn't just moved aside.
Ah, now I understand and stand corrected. You are correct in that the fluid must return . I wasn’t thinking and sorry for my post
Please read above post . I forgot to add the quotes to it . My apologies, I now understand you comment. Gary
If anyone ever needs help with late-model GM parts info...hit me up! Best damn GM parts guy around! I'll do what I can!
@flatheadpete What a gracious offer! If you are serious and can handle the deluge, you might put it in your signature for those that didn't see it here. @gary macdonald it takes strength to admit when you are wrong. Kudos.
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