Engine noises

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Jul 11, 2011 | 12:59 AM

Loganfwx

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Joined: Feb 2010

Posts: 123

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From: Greeley, CO

Year: 1999

Model: Cherokee

Engine: 4.0 Straight 6 HO

Engine noises

Anyone got some kind of guide or videos or something of engine noises? Mine makes a... clacking noise at higher RPMs on warm days... With my luck the whole thing's boned. hah.

Jul 11, 2011 | 02:34 AM

94JeepCherokeeMan

CF Veteran

Joined: Jun 2011

Posts: 1,023

Likes: 1

From: Southern Idaho

Year: 1994

Model: Cherokee

Engine: 4.0 L/242 CID I-6 High Output MFI

Mine makes a lot of valve noise. Mileage on yours?

Jul 11, 2011 | 03:45 PM

Loganfwx

Thread Starter

Member

Joined: Feb 2010

Posts: 123

Likes: 0

From: Greeley, CO

Year: 1999

Model: Cherokee

Engine: 4.0 Straight 6 HO

153k. What's valve noise sound like?

Jul 11, 2011 | 05:32 PM

94JeepCherokeeMan

CF Veteran

Joined: Jun 2011

Posts: 1,023

Likes: 1

From: Southern Idaho

Year: 1994

Model: Cherokee

Engine: 4.0 L/242 CID I-6 High Output MFI

Kind of a chugging "clag-clag-clag" sound...

Jul 11, 2011 | 05:35 PM

99 Purple XJ

CF Veteran

Joined: Oct 2010

Posts: 1,889

Likes: 2

From: Long Island N.Y.

Year: 1999

Model: Cherokee

Engine: I6 4.0

Mine does the same thing at idle its just a clack clack clack at idle i just ignore it

Jul 11, 2011 | 05:44 PM

94JeepCherokeeMan

CF Veteran

Joined: Jun 2011

Posts: 1,023

Likes: 1

From: Southern Idaho

Year: 1994

Model: Cherokee

Engine: 4.0 L/242 CID I-6 High Output MFI

What it is is wear on the valves. After so many miles, the rods get out of spec and they need to be serviced. I'll probably buy a new head sooner or later.