Brake bleed clear tubing, inside diameter???

Originally Posted by Fishey

Yes, I don't know anything about cars because I don't advise gravity bleeding.

First, gravity bleeding uses gravity to flow fluid meaning that there is very little pressure exerted on the line with very little flow. Small bubbles can still stay in the line.

Second, with such little flow/pressure if you have any air in your ABS system it is almost guaranteed not to work.

Third, you don't actuate the master cylinder and you can still have air stuck in it. I have seen this a number of times even with motive pressure bleeders failing to bleed out the brake system properly especially on older Porsche. (964/993) The motive method is like 99% better then gravity bleeding regardless.

Fourth, Running expensive fluid? Cause gravity bleeding tends to be a big waste. I guess unless I am running around watching each bleeder and then closing them but that seems like more work then bleeding properly. I mean most cars hold about 500ml of fluid so wasting half a bottle of SRF does not sound appealing.

Fifth, Gravity bleeding takes forever simply because of the lack of pressure.

So yea....

Originally Posted by Baer383

Like I said your comment on this forum doesn't hold water ,plus I have been working on cars probably longer than you have been alive.

Originally Posted by SouthArk370Z

Well, I figured that info would be in the FSM but all it calls for is "vinyl tubing" (I think they meant PVC). As cheap as the stuff is (you can find it in most hardware, hobby, pet (fish) stores for a few bucks for a 5-10 ft roll), just buy 2-3 different IDs and see which works best. 1/4" or 3/8" ID will probably do the trick but I've never bled the brakes on a 370Z.

Originally Posted by Baer383

By the time he runs around to find that hose I can flush the whole brake system in 20 minutes by myself.

Originally Posted by SouthArk370Z

I don't disagree with you. I follow your basic procedure - put a bucket under it and then wash any spills with soap and water. But it can get pretty messy and, if I ever bleed the brakes on my 370, I'll probably use some tubing. The tubing is not necessary but it sure makes cleanup a lot easier. It also helps keep air out of the line if you are pumping the brake pedal to build up pressure.

Originally Posted by Baer383

You guys are funny

When bleeding the brakes and bleeder screws are tight hose them down with water(which dilutes the brake fluid)so I don't know how much cleaner than that.plus if you guys completely understood the brake system you would know that there is no reason for a power bleed (foot/machine)unless you are at dealer and they are bleeding the ABS unit in which case the solenoids need to be in the locked open position to remove any air.

Originally Posted by SouthArk370Z

I really don't see what the big deal is. Unless using the tubing can somehow mess things up, what difference does it make? Is it necessary? No. Is it neater? Yes.

Originally Posted by Baer383

You guys are funny

When bleeding the brakes and bleeder screws are tight hose them down with water(which dilutes the brake fluid)so I don't know how much cleaner than that.plus if you guys completely understood the brake system you would know that there is no reason for a power bleed (foot/machine)unless you are at dealer and they are bleeding the ABS unit in which case the solenoids need to be in the locked open position to remove any air.

Originally Posted by roy'sz

yea lets spray coagulated oil across the rotors and pads...mmmm hmmm great idea! motive brake bleeder will take you about 10 min to do the job the right way.