Discovery II Talk about the Land Rover Discovery II within.
Sponsored by:
Sponsored by:

Intake brake vacuum connection

Thread Tools
 
Search this Thread
 
  #1  
Old 09-07-2022, 04:56 PM
cappedup's Avatar
Recovery Vehicle
Thread Starter
Join Date: Sep 2014
Location: Putnam county. NY.
Posts: 1,134
Received 89 Likes on 79 Posts
Default Intake brake vacuum connection

I noticed the connection at the intake for the brake booster is kinda wobbly.

I suspect it’s a self sealing thing, but it seems too loose for that, even when running.

I can pull the tube and remove the little red ring. The next plastic insert seems pretty tight.

Is there a way to tighten this up? Is it possibly fine?

I’ve noticed that my brake pedal is stiff and less effective for the first 2 minutes of running. Figured it could be a vac assist thing.
 
  #2  
Old 09-07-2022, 06:35 PM
nashvegas's Avatar
Pro Wrench
Join Date: Oct 2007
Location: Pacific NW
Posts: 1,819
Received 1,166 Likes on 626 Posts
Default

I think ya just buy a new red / black connector thing... rather than try to tighten it. $45 bucks or so on Amazon Ebay or JLR sources... BTW don't do what I did and hammer it in with a hammer if it's a tight fit. I broke one doing that.

LZN100220L is the part #

I will say the new ones fit pretty snug-ly on the vac tube.
 
  #3  
Old 09-07-2022, 07:19 PM
cappedup's Avatar
Recovery Vehicle
Thread Starter
Join Date: Sep 2014
Location: Putnam county. NY.
Posts: 1,134
Received 89 Likes on 79 Posts
Default

Originally Posted by nashvegas
I think ya just buy a new red / black connector thing... rather than try to tighten it. $45 bucks or so on Amazon Ebay or JLR sources... BTW don't do what I did and hammer it in with a hammer if it's a tight fit. I broke one doing that.

LZN100220L is the part #

I will say the new ones fit pretty snug-ly on the vac tube.
done. Ordered.

Any trick to getting the old one out?
 
  #4  
Old 09-07-2022, 08:36 PM
cappedup's Avatar
Recovery Vehicle
Thread Starter
Join Date: Sep 2014
Location: Putnam county. NY.
Posts: 1,134
Received 89 Likes on 79 Posts
Default

Well this is about as tricksy as it gets.

https://landroverforums.com/forum/di...anifold-97502/
 
  #5  
Old 09-07-2022, 10:39 PM
whowa004's Avatar
Pro Wrench
Join Date: May 2019
Location: Denver, CO
Posts: 1,678
Received 774 Likes on 510 Posts
Default

Originally Posted by cappedup
Well this is about as tricksy as it gets.

https://landroverforums.com/forum/di...anifold-97502/
perfect. I've had a new one sitting for months bc I was worried about getting the old one out and had heard a few horror stories..
 
  #6  
Old 09-07-2022, 11:43 PM
nashvegas's Avatar
Pro Wrench
Join Date: Oct 2007
Location: Pacific NW
Posts: 1,819
Received 1,166 Likes on 626 Posts
Default

That's utterly brilliant going in thru the throttle body side. I broke mine into 50 small bits of decayed soft plastic ... much cleaner this way.
 
  #7  
Old 09-11-2022, 12:39 PM
cappedup's Avatar
Recovery Vehicle
Thread Starter
Join Date: Sep 2014
Location: Putnam county. NY.
Posts: 1,134
Received 89 Likes on 79 Posts
Default

Worked like a charm. I stuck together all my 1/2” extensions, with a 10mm socket on the end.

Jammed a rag in the butterfly, put a thin flashlight in there.

Was very careful that the socket was on the plastic fitting before tapping. Didn’t want to bust a hole in the intake. Took maybe 8 taps. Ideally there would be something with a protrusion on the end, so it engages with the hole.

The old one is definitely more worn than the new one. The new one comes with a small bit of blanked off tube, and I can tell the old fitting was leaking by how much of a pop it makes when taking it out.

Anyway, the bad news is swapping the fitting didn’t fix my issue.

After cold starting it takes about 2 mins to get a proper brake pedal. Before that it’s stiff with reduced effect. Issue is my driveway is steep, and I don’t have full brakes at the bottom.

The vacuum line is holding pressure. After shutting off the car I can release vacuum for a couple of minutes.

Is there any way to test the booster itself?

Once going the brakes are fantastic.





 

Last edited by cappedup; 09-11-2022 at 01:36 PM.
  #8  
Old 05-11-2023, 12:34 AM
Discorama's Avatar
Recovery Vehicle
Join Date: Jun 2018
Location: CA
Posts: 1,145
Received 458 Likes on 270 Posts
Default

It's said Saab 55557389 is exactly the same part. $18 ebay, just in case you don't want to drop $45 for the same part with LR part no.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
escott16
Discovery II
2
11-23-2020 11:13 PM
adolfojbonilla
Discovery II
13
10-05-2019 12:30 PM
adolfojbonilla
Discovery II
16
04-16-2019 09:17 PM
ctang101
Discovery II
4
11-07-2017 08:38 AM
me6067
Discovery II
4
06-26-2015 08:13 PM



Quick Reply: Intake brake vacuum connection



All times are GMT -5. The time now is 06:18 AM.