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B5.9G, B5.9LPG – Troubleshooting and Repair Manual – 011-009   Exhaust Restriction

Table of Contents

Measure

Measure

 TOC

Pressure Gauge, Part Number ST-1273

Install pressure gauge, Part Number ST-1273, to the pressure tap in the exhaust head pipe or at the inlet to the catalyst/muffler assembly.

Operate the engine at rated speed and load. Record the exhaust restriction.

Service Tip: Remove the heated oxygen sensor and install a Compuchek® fitting to measure restriction.

SMALL | MEDIUM | LARGE


If restriction exceeds specification, inspect the oxidation catalyst and/or muffler and replace according to the vehicle manufacturer’s instructions.

Exhaust Restriction
mm-hg in-hg
B5.9 – 150G without Oxidation Catalyst 61 MIN 2.4
  114 MAX 4.5
B5.9 – 150G with Oxidation Catalyst 61 MIN 2.4
  114 MAX 4.5
B5.9 – 195G without Oxidation Catalyst 61 MIN 2.4
  102 MAX 4.0
B5.9 – 195G with Oxidation Catalyst 61 MIN 2.4
  127 MAX 5.0
B5.9 – 230G without Oxidation Catalyst 61 MIN 2.4
  140 MAX 5.5
B5.9 – 230G with Oxidation Catalyst 61 MIN 2.4
  140 MAX 5.5
 
SMALL | MEDIUM | LARGE
Last Modified:  03-Apr-2002
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