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Line Lock instalation

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Old Apr 18, 2009 | 11:40 PM
  #1  
Charged350's Avatar
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From: Queens, NY
Car: 87 IROC Z28
Engine: Custom Forged 355
Transmission: 700R4
Axle/Gears: 9" 4:11's Detroit Locker
Line Lock instalation

just swapped in my new tubular front suspension...need to make new brake lines for the front figured id mount my line lock at the same time, dont have the instrustions....need to know does it go in bofore the prop valve or after....a picture of one installed would be awsome.
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Old Apr 19, 2009 | 07:46 PM
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Car: 86 Trans AM
Engine: LS1 (not stock...)
Transmission: Built T56
Axle/Gears: Strange 12-bolt w/ 3.73
Re: Line Lock instalation

Hmm..most set ups Ive seen with a Line loc have had the prop valve removed. But in any case, since the LL solenoid has to lock both front wheels, you'll need to mount it before the lines split for the front. So basically...if you retain the stock "combo" valve, you'll need to go from the master cylinder, to the LL, then to the combo valve, then split to the front brake calipers.

Its either that, or you have to bring the two front lines together after the combo valve, then go into the LL, then split them again...which just seems silly.

If you are going to plumb it before the combo valve, then you'll obviously need to get creative with the lines. Maybe someone can chime in with some pics for ya. Im not running a stock combo valve, so none of my pics will be of any help.

That help ya any?

J.

Last edited by ghettocruiser; Apr 19, 2009 at 07:50 PM.
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Old Apr 25, 2009 | 11:12 AM
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Re: Line Lock instalation

Hey can you post up your pics of your LL. I am getting ready to install mine on my car. I need to know if I need to buy one of those install kits or can I just simply pick up what I need att he parts store?
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Old Apr 25, 2009 | 01:46 PM
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From: Tacoma, Wa
Car: '91 TA vert
Engine: turboLSx
Transmission: T56
Axle/Gears: 3.23
Re: Line Lock instalation

Originally Posted by ghettocruiser
But in any case, since the LL solenoid has to lock both front wheels, you'll need to mount it before the lines split for the front. So basically...if you retain the stock "combo" valve, you'll need to go from the master cylinder, to the LL, then to the combo valve, then split to the front brake calipers.
That's about the only way I see it being mounted as well. Although, this is the perfect time to ditch the combo valve. I would think there'd be issues with the brake warning light with it mounted there though? One circuit would see pressure when the other wouldn't? At the very least I'd see it tripping the brake indicator when the LL is active, and the worst damaging the internals of the combo valve? I don't know for sure though. I ran a gutted combo with a LL and then eventually just ditched the CV all together.
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Old Apr 25, 2009 | 02:39 PM
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Re: Line Lock instalation

If it is installed past the combo valve(equalizer valve) it should not effect the brake light switch. My biggest wonder is it what size fittings?
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Old Apr 25, 2009 | 05:09 PM
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From: Tacoma, Wa
Car: '91 TA vert
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Transmission: T56
Axle/Gears: 3.23
Re: Line Lock instalation

Originally Posted by thumper1151972
If it is installed past the combo valve(equalizer valve) it should not effect the brake light switch. My biggest wonder is it what size fittings?
Right. No one said otherwise. I did say that if it was before the combo valve you might have issues, I don't know.

However, I guess you could just cap one port on the combo valve, run one line from the MC to the valve and one from the valve to the LL?
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Old May 3, 2009 | 07:40 PM
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Re: Line Lock instalation

Originally Posted by Charged350
just swapped in my new tubular front suspension...need to make new brake lines for the front figured id mount my line lock at the same time, dont have the instrustions....need to know does it go in bofore the prop valve or after....a picture of one installed would be awsome.
The line lock solenoid gets plumbed in between the master and the proportioning valve......the rear line on the master is the front calipers which you remove and also remove the end from the prop valve...then from the master put a new line going to the ll solenoid.....then from the solenoid a line back into the prop valve....its really easy just did mine this weekend.....just make sure you bleed your brakes after install ....
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