Replacing brake booster
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bonniebird
- SLE Member
- Posts: 34
- Joined: Sun Feb 16, 2014 7:05 pm
- Year and Trim: 1998 SE
Replacing brake booster
Thought replacing the brake booster on my 98 bonnie would be easier....geez its a nightmare inside the car just trying to gain access to the booster studs...so far just got the cover plate off...hate laying under the steering wheel...anyone have a magic wand???? The factory book tells me crap!!!!
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MKMike
- Posts like an L67
- Posts: 1305
- Joined: Thu May 01, 2014 9:37 pm
- Year and Trim: 1993 SLE
1998 SE
2001 SSEI
2002 SSEI
Re: Replacing brake booster
Are you sure the booster is bad, not just the check valve that plugs into it?
Is the vacuum hose going to the booster intact or is it cracked, split, etc.?
2 tests to do before replacing the booster:
Inspect the Check Valve
1.Disconnect the vacuum hose where it connects to the intake manifold. Do not disconnect the vacuum line from the booster. Air should not flow when pressure is applied, but should flow when suction is applied. If air flows in both directions or there is no air flow, the valve needs to be replaced.
Verify Enough Vacuum
1.Check the operating vacuum pressure when the engine is at normal operating temperature. There should be a minimum of 18 in. of vacuum. Vacuum may be increased by properly tuning the engine, checking for vacuum leaks and blockages in vacuum lines.
Excerpted from here http://www.classicperform.com/TechBook/ ... eshoot.htm
Is the vacuum hose going to the booster intact or is it cracked, split, etc.?
2 tests to do before replacing the booster:
Inspect the Check Valve
1.Disconnect the vacuum hose where it connects to the intake manifold. Do not disconnect the vacuum line from the booster. Air should not flow when pressure is applied, but should flow when suction is applied. If air flows in both directions or there is no air flow, the valve needs to be replaced.
Verify Enough Vacuum
1.Check the operating vacuum pressure when the engine is at normal operating temperature. There should be a minimum of 18 in. of vacuum. Vacuum may be increased by properly tuning the engine, checking for vacuum leaks and blockages in vacuum lines.
Excerpted from here http://www.classicperform.com/TechBook/ ... eshoot.htm