Auto Parts Search
Isuzu Engine >> VALVE TRAIN TICKING SOUND ON 3.2L ISUZU ENGINES
Valve Train Ticking Sound On
1992-98 Isuzu 3.2L Engines
The AERA Technical Committee offers the following information regarding a valve train ticking sound on 1992-98 Isuzu 3.2L engines.
One or more hydraulic lash adjusters do not fully extend due to varnish build up inside the adjusters. This condition results from exceeding the oil and filter change intervals on the vehicle.
There are a couple of ways to possibly cure this problem that Isuzu offers. One of the simplest ways is changing the engine oil and filter using a 0W-30 synthetic engine oil prior to replacing any engine components. If the noise persists after those changes, refer to the following information.
Once we have determined which bank the noise is coming from, the cylinder head valve cover needs be removed so that we can inspect each rocker arm for clearance at the valve tip. The noisy rocker arms are the ones with clearance when the rocker is on base circle of the cam and the valve is closed as shown in Figure 1.
Note: Each cylinder head has an oil pressure relief valve that controls oil pressure to the rocker arms. If all rocker arms have clearance and/or the rocker arm pivot shaft is worn, then the cylinder head oil pressure relief valve may be stuck in the open position.
Remove the rocker arm(s) that have clearance on them and inspect the wear pattern of the hydraulic lash adjuster surface contact with the valve stem as shown in Figure 2. Then remove the hydraulic lash adjuster from the rocker arms using your fingers. Do not damage the O-ring on the outside of the lash adjuster or replacement of the entire rocker arm is required.
Insert a paper clip into the hole at the top of the lash adjuster and depress the spring loaded check ball while completely pushing in the piston at the opposite end. Some traces of oil may come out of the check ball hole.
Carefully remove the O-ring and spray the lash adjuster piston with cleaner to remove any varnish while holding the piston open. Submerge in cleaning solvent with the check ball depressed and pump the piston repeatedly to allow the solvent to penetrate through the lash adjuster.
Submerge the adjuster in clean 0W-30 synthetic engine oil with the check ball depressed and pump the piston repeatedly to allow the engine oil to penetrate through the lash adjuster. Then allow the piston to extend fully to fill the adjuster.
Reinstall the O-ring and lube the rocker arm bore that houses the adjuster with 0W-30 synthetic engine oil, then push the adjuster back into place. Inspect for leaks at the check ball and piston by attempting to compress the adjuster without depressing the check ball.
The AERA Technical Committee
Looking for replacement Isuzu engines? Visit our online Rebuilt Engines Store. Need to fix your Isuzu engine? Access here the comprehensive online repair guide for your Isuzu engine. Click Here to find a used Isuzu engine.
Shop online for auto body parts, engines, wheels, lights...
|2006 Isuzu I-350 Oil Filter, Features full flow safety by-pass; Strong barium ferrite magnet removes 99.9 percent of the harmful particles at filter entrance; 50 micron secondary filter membrane captures non-ferrous clutch fibers and other material; Perforated steel cord reinforces and eliminates filter collapse under high pressure surges; Polymer casing provides zero-leak, high impact, stone and salt resistance; Tested up to 350 degrees Fahrenheit; Secure fit SAE standard hose barb; Easy installation to rubber hoses or cooler lines with included compression fittings..||$27.79|
|2000 Isuzu Hombre Neutral Safety Switch, Blade type; 4-prong and 7-prong male terminals; A high quality, direct fit OE replacement neutral safety switch; With 2 years limited Trustbuilt warranty..||$37.58|
|1999 Isuzu Oasis Park Lamp Assembly Passenger Side, Parking/Signal/Side Marker Light; Front; Passenger Side [Corner OF Fender], , .||$37.45|
|1986 Isuzu Impulse L4, 1.9 L, 1949 CC Rebuilt Engine, SOHC, Izusu eng, with mechanical fuel pump, G200 series., Warranty: 3-Year/100,000 Mile, .||$1,625.00|
|2000 Isuzu Amigo Used Air Flow Meter/Sensor, 3.2, AUTO, 4X4 (3.2L, 6 cyl), Very Good.||$69.00|
|2002 Isuzu Axiom Used Wiper Motor Rear, Very Good.||$78.00|
Help me find
Search DIY repair manuals by VIN...
Need To Fix Your Car or Truck?
Try Our Repair Service Finder
Help me find