2000 XJ, 4.0L.
I've noticed my engine making some odd noise when it first cranks over. The noise happens every once in a while, sometimes briefly (as in the video), sometimes it lasts 5-7 seconds.
No apparent head gasket issues, though the engine does drink some oil (no leak found anywhere outside the engine), about half a quart every couple of weeks.
The noise is not isolated to cold starts only: I've had it happen a couple times on hot starts.
It sounds like fast piston slap to me, or fast rod knock, but obviously can't say for sure.
Any ideas on what is making the noise, or how concerned I should be with it? It runs fine, otherwise (though it does have piston slap until it warms up, like many of these engines).
EDIT: sorry, can't get the video to load for whatever reason. I'll upload it from my computer later this afternoon.
I've noticed my engine making some odd noise when it first cranks over. The noise happens every once in a while, sometimes briefly (as in the video), sometimes it lasts 5-7 seconds.
No apparent head gasket issues, though the engine does drink some oil (no leak found anywhere outside the engine), about half a quart every couple of weeks.
The noise is not isolated to cold starts only: I've had it happen a couple times on hot starts.
It sounds like fast piston slap to me, or fast rod knock, but obviously can't say for sure.
Any ideas on what is making the noise, or how concerned I should be with it? It runs fine, otherwise (though it does have piston slap until it warms up, like many of these engines).
EDIT: sorry, can't get the video to load for whatever reason. I'll upload it from my computer later this afternoon.