Varnish buildup in engine may cause ticking noise on Isuzu Rodeo

Varnish build up in the engine can cause one or more hydraulic lash adjusters to stick and cause a ticking noise in the engine. The noisy hydraulic lifter will need to be located and cleaned to stop the noise.

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Average mileage: 109,050 (30,000–146,200)
Engines affected: 2.2L 4 Cylinder, 3.2L V6
5 model years affected: 1994, 1995, 1996, 1997, more2002
8 people reported this problem
2 people shared problem details
Flushing oil with solvent during changes helps, but does not prevent.
1995 Isuzu Rodeo- 3.2L V6140,000
I am now at 201K miles and I use Lucas Oil Treatment with every oil change, after 30 mins of driving the ticking stops and you are good for about 3500 miles and then the ticking starts again, this is normal for oil breakdown) I have tried the following treatments to stop the tick; STP Oil treatment, Marvel Mystery oil, several PPTF or teflon based engine treatments only Lucas Oil reinstatement works to keep my sewing machine engine quiet. IT much cheaper than a lifter.
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