Overview
The Crown Automotive J8129097 is a timing gasket and seal kit for 2.5L, 4.0L or 4.2L Jeep engines, for vehicles from 1974 to 1991. It covers Cherokee (SJ and XJ), CJ models, Comanche, Grand Wagoneer, Scrambler, Wagoneer (SJ) and Wrangler (YJ).
Engine coverage varies across the fitment range: most entries are for 2.5L and 4.2L engines, and one entry includes the 4.0L. Confirm your engine size before ordering.
Key features
- Timing gasket and seal kit
- Engine notes cover 2.5L, 4.0L and 4.2L
- Fits Cherokee, CJ, Comanche, Scrambler and Wagoneer models
- Covers the 1974 to 1991 Jeep range on the list
Timing cover seals in service
A timing cover gasket seals the front of the engine, where oil and coolant pass near the cover. Over time the gasket hardens or shrinks, and oil can seep at the cover edges, down the front of the block or onto the belts. When the cover is off, the seals around the crank and cam are usually the next things worth inspecting.
Clean sealing surfaces carefully so no old gasket material remains, and avoid scratching the block or cover. Check that the cover sits flat and that bolts are tightened in the proper sequence. Because the timing components are behind the cover, inspecting belts, pulleys and the water pump at the same time can save a second teardown.
- Check for oil at the cover edges after the first drive
- Inspect the front crank seal for hardening or leaks
- Replace worn timing belts or chains while the cover is open
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J8129097 |
| UPC | 848399079722 |
| Engines | 2.5L, 4.0L and 4.2L |
| Part type | Timing gasket and seal kit |
| Fitment type | Direct fit |
Vehicle fitment
It fits 1974 to 1991 vehicles: Cherokee (SJ and XJ), CJ5, CJ6, CJ7, DJ5, Comanche, Grand Wagoneer, J10, J20, Scrambler, Wagoneer (SJ) and Wrangler (YJ).
Models from 1992 on, including the Wrangler (TJ) and Cherokee (XJ) years after 1991, are not on the list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The engine notes are not consistent on 2.5L versus 4.0L coverage, so confirm your engine before fitting the kit.
What’s included
The kit contains timing gaskets and seals. Count the parts on arrival against your install plan.
