The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support ExtremePSI
Please Support ExtremePSI

2G Help!! Brake booster hose/line

This site may earn a commission from merchant
affiliate links, including eBay, Amazon, and others.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

TheGreatGSX

10+ Year Contributor
133
1
Dec 27, 2008
Morgantown, West_Virginia
During the installation of my turbo/FIC/etc my brake booster hose was dry rotted and upon taking it off, the SOB broke. No big deal as I said since I was ordering some parts from the Mitsu dealership anyways.

As I went to pick up my parts yesterday, I find out that the part is "Obsolete" and they cannot order it. I checked at Advanced, Napa, Auto Zone, and even a custom parts store that make parts for you (Hoses, pipes, etc.) and they've all said the same thing "This hose is specially made and although we can make something for you, we'd be afraid it wouldn't be as durable as the OEM."

I don't have much options for a junkyard, I did call my local junkyard and they have said they "think" they have a couple of GSX's laying around, and as professional as they are I asked for there hours of operation and they said "I don't know, you'll have to call, sometimes we're here, sometimes we're not." And I hate doing business with unprofessional people and really don't want to wait for when "they'll be there".

I read on another thread that Pep Boys carry this part and wanted to confirm because Pep Boys is an hour and a half drive for me and I'm not sure they were talking about the same part, they had said the part from Mitsu was only like $8.00, the part I'm talking about is $80.00 from Mitsu. Any advice or direction would be greatly appreciated (Sorry for the book :boring: )

Edit:
The hose connects from the brake booster, it's a very thick hose with a plastic peice(s) inside that I am told controls the air pressure going through the hose.
 
OOOOHHHH, and one last thing just so you guys can empathize with me a little. Nobody in this area that works at a parts store/dealership apparently knows nothing, I went to Advanced Auto the other day and asked for "Copper Washers" and the 16 year old girl stared at me while chomping her stride gum and lipped "What the..." then yelled for somebody and asked him what "Copper Washers" are then he stood there dumbfounded for a solid 3minutes, then he called somebody in which he did the same thing, then finally they called over the manager who finally knew what a copper washer was...This has been my life over the last 3 weeks.

"But why didn't you just get them/find them yourself" - Because they were behind the desk where customers cannot go.
 
I can totally respect that... and wish a grand was even a tenth of what I've spent on mine (so far). :)
Wish I had that budget...

Ehhh... not sure what that means. "Go pedal" is just a goofy old slang term for accelerator. :)
Over your head I guess?
Ain't gonna happen man. I would totally trust it, but for all I know you might get all liquored up and sideways when you install it and end up killing someone. I don't need that kind of liability. LOL

If you can push a hose on a barb nipple, you can make one. It's only marginally more difficult than walking and chewing gum at the same time. :)

Well I wouldn't be installing it, my friend would be...it'd be no liability, all you'd have to do is write a note that says you are not responsible. Besides, I'm too lazy to sue anyone.

Besides, I wouldn't put all this effort into this damn hose for me just to install it improperly. Anyways, thanks again for all the help, I'll check into making one myself tomorrow and hopefully SOMEONE in this area has some large FI hose.
 
Oh I don't have a budget. I've just been selling crap I've accumulated over 35 years and cashed out some other hobbies. And working all the overtime and side projects I can. Plus it has been spread out over the last 3 years.

NAPA should have the hose...at least all the ones around here do. Just ask to go look at the shelf and find some that is about the right size.

Good luck with it!
 
Thanks man, appreciate it! I'll update this once I get something together here. And a few last questions though, if the hose and/or check valve does fail what would be the symptoms? Hard to push brakes?

Where in the hose should I put the check valve and how do I put it in there, just shove it in? Which leads into the final question, which direction does it need to go?
 
... if the hose and/or check valve does fail what would be the symptoms? Hard to push brakes?

Yes. The brakes will still work, but it will take a lot more effort. If you are boosting and the check valve somehow got stuck open, it could damage the diaphram in the booster.

Fortunately check valves are simple devices and IMO don't fail very often in this application. In fact, I can't say as I've ever heard of a booster check valve failing under normal operation.

Where in the hose should I put the check valve and how do I put it in there, just shove it in? Which leads into the final question, which direction does it need to go?

It doesn't really matter where it is in the hose...somewhere near the middle is fine. Just be sure to orient it so that air can flow from the booster to the manifold, but not from the manifold to the booster. Hold one end towards the booster and blow into the manifold end. If you can't blow through it...you're good.

P.S. Don't hook it to the booster for this test though, because the booster may provide enough resistance to air flow that you can't be sure if it's the valve preventing the airflow or not.

*****

If you want to see what it feels like without the booster hose... pull the hose off the booster (or off the manifold if you have a way of blocking the manifold port) with the car on level ground, and take it up to 4-5 miles an hour and push the brake pedal. Obviously you should only do this on flat ground with no obstacles around, and at a very low speed.
 
Goes from the brake booster on the fire wall to the back of the intake manifold behind the throttle body. The picture I have is a 2g intake manifold.
 

Attachments

  • 20190122_194031.jpg
    20190122_194031.jpg
    479.6 KB · Views: 44
The part number is MB895885, and is about $12 from JNZ. If the dealership quoted you at $80 for the hose then maybe there was a miscommunication about which part you needed. I would give JNZ a call just to have them verify the part is actually discontinued.
I know this post is real old but thanks! That's exactly what im looking for.
 
Really late seeing this, but in case someone else runs across this issue:

The 1G and 2G Brake Booster Hoses have been discontinued for quite some time (MB895885--2G, MB668201--1G). For around the last 6-8 years, we have used/sold the Evo unit which works after trimming the length to fit:

Evo Brake Booster Hose with Check Valve

The issue is that even THOSE are now becoming hard to get and may be getting to the end of their lifespan with Mitsubishi.
 
Really late seeing this, but in case someone else runs across this issue:

The 1G and 2G Brake Booster Hoses have been discontinued for quite some time (MB895885--2G, MB668201--1G). For around the last 6-8 years, we have used/sold the Evo unit which works after trimming the length to fit:

Evo Brake Booster Hose with Check Valve

The issue is that even THOSE are now becoming hard to get and may be getting to the end of their lifespan with Mitsubishi.
Do you know if the 1g’s came with a check valve? Mine looks to be the original but it doesn’t have a check valve, and my brakes/pedal works fine.
 
They do, or are suppose to. Imagine blowing 25lbs or MORE of boost into the diaphragm. You can blow a hole in them. I run a separate 1 way metal check valve with my booster line.
I have used the plastic ones but find that they will break eventually (I broke one this week) so use a metal one. I also have one in my PCV hose.
 
They do, or are suppose to. Imagine blowing 25lbs or MORE of boost into the diaphragm. You can blow a hole in them. I run a separate 1 way metal check valve with my booster line.
I have used the plastic ones but find that they will break eventually (I broke one this week) so use a metal one. I also have one in my PCV hose.
Yeah I’d imagine there should be one but went to double check and I don’t see one. I’ll have to remove the hose and confirm this.
 
Yep. It's in there. Should be towards the end of line towards the booster.
You’re right and mine works :hellyeah:
You must be logged in to view this image or video.
 
When I started turning the boost up to 40 or more is when I went with an extra one in line. I didn't know how much the factory rated the originals at.
 
When I started turning the boost up to 40 or more is when I went with an extra one in line. I didn't know how much the factory rated the originals at.
Not sure either but it won’t hurt.
 
I have found that running it in my PCV line helps a hell of a lot on blow by also. I loop the line back behind the intake and back so I am not limited in where it can go since the pcv line is very short. I don't run a catch can and I think that the check valve helps (dipsticks don't pop out either). ;)
 
Just want to chime in here and thank you guys for the suggestions. I was suspecting a bad brake booster check valve (or lack thereof) and I fitted a standard fuel/air metal barbed check valve right after the nipple coming off the intake manifold. I tried feeling the stock hose to see if it had a valve anywhere inside it but honestly it was all squishy, unsure if it ever had a valve to begin with! After installing the additional check valve (flow towards manifold) I noticed my brake pedal was more responsive at light taps and on ECMlink my AFRs dont lean out as much when pressing the brake. Definitely a worthy upgrade as a peace of mind (as well as the extra check valve in the PCV system!!).

You must be logged in to view this image or video.
 
I have found that running it in my PCV line helps a hell of a lot on blow by also. I loop the line back behind the intake and back so I am not limited in where it can go since the pcv line is very short. I don't run a catch can and I think that the check valve helps (dipsticks don't pop out either). ;)
I hate to resurrect a dead thread but can you elaborate on this? I’m in need of fixing my PCV system, getting a ton of blowby
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top