1999 Jeep Grand Cherokee Problems: 1 Issues Every Owner Should Know
1999 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 1999 Jeep Grand Cherokee has 1 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $400 to $1,400. DIY maintenance guides at au7o.io.
All 1 Known Issues
On the 1999-2009 Jeep Grand Cherokee, the 4.7L V8 used in Grand Cherokee models is widely reported to develop broken exhaust manifold bolts or warped manifold sealing surfaces, especially after repeated heat cycles. Owners typically notice a ticking noise on cold start that may quiet as the engine warms, sometimes mistaken for valvetrain noise. Left unrepaired, the leak can worsen and may contribute to exhaust odor or failed emissions inspection.
Common Symptoms
- Ticking noise on cold start
- Exhaust smell in engine bay
- Soot near exhaust manifold
- Noise decreases as engine warms
- Possible emissions test failure
How to Fix
Confirm the leak with a cold-start inspection, listening near the manifold and checking for soot around the flange and broken fasteners. Repair usually involves extracting broken studs/bolts, resurfacing or replacing the manifold if warped, and installing new hardware and gaskets. Penetrating oil, heat, and careful extraction are often required because broken fasteners in the cylinder head are common.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- TipOwners recommend replacing all manifold hardware on the affected side once one bolt breaks, rather than only the visibly failed fastener.
- TipA smoke test or cold-start stethoscope check helps distinguish manifold leaks from injector or valvetrain noise.