PHH: Replacement vs By-Pass. My Thoughts. (1 Viewer)

[harrydunn]

Two years ago, I did my '93 LC the old fashioned way. What an ordeal that was. Got it off no problem but that's where the fun ended.

I decided to try the by-pass this time on my brother's new LX. By-pass wins hands-down IMO. Took about an hour at a leisurely pace.

1) Remove wheel and skirting
2) Loosen trans dipstick
3) Cut first clamp with Dremel
4) Remove second clamp with small vice grips
5) Cut/Remove old PHH
6) Break lower mount and remove vertical pipe
7) Install by-pass
8) Eat Arby's large Roast Beef with Curly Fries and Diet Pepsi (It's good mood food!)

 

[e9999]

did a replacement even though I had plenty of bypass hose available.
The hard part was putting the hose back on the engine nipple. (Cuz inadequate lubing). Would be about a bit easier with bypass I think, cuz more to grab on, but maybe not significantly so?

 

[harrydunn]

We lubed everything nicely which made the install easy. Something I should mention that I didn't think about is how much quicker doing it the second time was due to the sole fact of having done it before and knowing what to expect. No substitute for experience and familiarity.

 

[Pin_Head]

My thoughts:

Why bother removing the old tube if you are going to bypass it?

If you remove the tube, it makes more sense to reuse it so you use less hose and have a more sanitary installation without all that ugly hose winding around the brake booster.

 

[d0ubledown]

yep. bypass is where its at. less points of failure. 2 clamps and 1 hose vs, multiple clamps, hose, and metal tubing. its like using a piece of 2, 3, and 4" wires, and butt connectecting them together to get one 10" piece of wire...doesnt make sense.

 

[kidglove13]

My thoughts:

Why bother removing the old tube if you are going to bypass it?

If you remove the tube, it makes more sense to reuse it so you use less hose and have a more sanitary installation without all that ugly hose winding around the brake booster.

I did not go around the brake booster
Why would you go around the booster?
Because of the EGR pipe?
My EGR is disabled so maybe that makes a difference
There is plenty of room to run it between the intake and the booster and you just sleeve the pipe with another pipe if you are concerned about it

 

[Mikesta]

I've done 3 PHH replacements. Each time I swear. So much that if I had to put a quarter in a jar for each word, I'd be able to take the family out for a nice meal.

 

[ybhc]

My thoughts:

Why bother removing the old tube if you are going to bypass it?

If you remove the tube, it makes more sense to reuse it so you use less hose and have a more sanitary installation without all that ugly hose winding around the brake booster.

You dont need to go around the booster. I don't know where this myth came from but I keep hearing it.

Second, I prefer only two hose ends, as opposed to 4, with two right down in the hot area.

 

[Pin_Head]

Lots of people go around the outside booster if you look at the pictures people post. If you don't, then why not use the original steel tube? It goes inside the booster too and it is exactly the right size and looks clean and original. I don't get why you would make a new hose set up when the one you already have works perfect. It is not like hose clamps fail often enough to worry about.

 

[harrydunn]

I think that's awesome. Makes me feel layered. Like some sort of epic lasagna

 

[Trapper50cal]

No need to bypass around the booster, if you really wanna get crazy, just protect the line with some sheathing-like wire loom conduit. Seems to me that leaving the hardline in place would be a good idea. If you ever rupture the hose for whatever reason, you could use 2 smaller pieces cut off of the ruptured line (and the original hardline) to limp out of wherever you are...given you have some extra hose clamps in waiting. System redundancy.


Green Goodyear ("Garden Hose") Silicon hose available by the foot at AutoZone
Don't forget to use constant torque clamps with this stuff.

By trapper50cal at 2011-03-20

 

[harrydunn]

However you want to do it, I think the main thing to take away from this is that it's done and you won't have to mess with it for a long time...hopefully.

 

[SupraTuRD]

With the "bypass" method, what is being bypassed?

 

[retrofive]

With the "bypass" method, what is being bypassed?

The metal hose that runs between the engine and firewall.

 

[SupraTuRD]

Thanks retro. So basically a longer hose to replace a metal pipe and two rubber hoses?

 

[LandCruiserPhil]

With the "bypass" method, what is being bypassed?

The metal pipe

My thoughts are my original lasted 18 years and 150K and looked new when removed. I replace the assembly with a factory part. If the replacement last the same it will be the year 2032

 

[retrofive]

Thanks retro. So basically a longer hose to replace a metal pipe and two rubber hoses?

Yup. Did mine that method years ago. No issues. And if it happens again I will grab some more hose and replace.

 

[retrofive]

The metal pipe

My thoughts are my original lasted 18 years and 150K and looked new when removed. I replace the assembly with a factory part. If the replacement last the same it will be the year 2032

Very true. I broke my metal pipe, so went bypass method. Sometime later I picked another stock metal pipe if I ever wanted to go back to OG.

 

[Ironbuck]

What does the PHH do? Sorry, still coming up to speed on some of these things and I am curious. Heater hose, but in what way.

 

[SupraTuRD]

I was thinking the same thing Phil.

Regardless of what material or method is used, a piece of thermal wrap should be beneficial around the hose.