2018 Jeep Grand Cherokee: Engine valve train junk
Common wear/failure (not a recall)
Symptoms
Owners of the 2018 Grand Cherokee report: engine valve train junk. CarComplaints.com lists 1 owner complaints, average mileage 70,000 miles.
NHTSA has 141 owner complaints for the 2018 Grand Cherokee in this area. Examples:
- NHTSA complaint ODI #11768504 (filed 10/02/2026): “The contact owns a 2018 jeep grand cherokee. the contact stated that while taking the vehicle to a service center for an oil change, the oil filter plastic housing unexpectedly warped after the oil change. the contact stated that after the failure, smoke was c…”
- NHTSA complaint ODI #11766927 (filed 09/25/2026): “Sudden loss of power while driving 75mph in the fast lane on [xxx] in [xxx]. my 2018 with the 3.0ltr eco diesel engine was involved in a sever life-threatening event that caused my engine to fail while driving and i request immediate corporate escalation! o…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: replace valve train components (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $6,000 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
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