White colored exhaust valves, is this concerning?

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Jul 21, 2025 | 07:11 AM

#16

XJ2MTNS

Semper Discens

Joined: Jun 2025

Posts: 367

Likes: 131

From: Near The Peaks, VA

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0

Is that a crack or just the edge of carbon buildup? I believe this is cylinder #6.

Last edited by XJ2MTNS; Jul 21, 2025 at 07:16 AM.

Jul 21, 2025 | 07:15 AM

#17

XJ2MTNS

Semper Discens

Joined: Jun 2025

Posts: 367

Likes: 131

From: Near The Peaks, VA

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by algebraic429

The gasket had a brand name on it “apex”

Ah yes I see that now. Apex does not make oem head gaskets for any manufacturer. They make oem replacement style gaskets. So that engine has been opened up before.

Jul 21, 2025 | 11:01 AM

#18

algebraic429

Thread Starter

Junior Member

Joined: Jul 2024

Posts: 58

Likes: 11

From: Southern California

Year: 1993

Model: Cherokee (XJ)

Engine: 4.0

Thanks for all the help guys, ill check the pistons and head for cracks and get everything back together hopefully smoothly.

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