engine knocking in 02 grand cherokee ...4.7l engine


Asked by Apr 05, 2013 at 10:54 PM about the 2002 Jeep Grand Cherokee Sport 4WD

Question type: General

7 Answers


Knocking - when does it happen? Where is it coming from? When did you discover it? When does it change?

3 people found this helpful.

it burns oil.....no oil leaks.....don't know where the ticking/knocking is coming from.........my oil levels are normal ....it ticks/knocks while it idling and when driving

3 people found this helpful.

If it's ticking all the time, it could be a collapsed lifter for the valves. If it knocks on acceleration, it could be a rod bearing.

3 people found this helpful.

sounds like the timing is way too soon, 'course maybe this is an engine to where the distributor does not exist, so it's gotta be a vaccuum leak, you could use an unlit propane torch to find it...the speed will increase when you find it~

1 people found this helpful.

Does it knock louder rite at start-up?

5 people found this helpful.

hey mrmoony i have the same thing going on with mine. yes... it knocks louder at start up. mine actually stops knocking after a while.

2 people found this helpful.

still maintain that it's the vacuum line what connects the fuel pressure regulator, would go defective...leak vacuum causing high idle/and fast timing and would not regulate the fuel to the rail~

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