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[RockItMan]

Hello, hope someone out there can help!
I have a v6 grand cherokee, running on dual fuel liquid petroleum gas and gasoline (petrol)
I have only owned it a couple of months and all has been fine.
However running on either fuel there does seem to be excessive tappit noise from the valves, especially when accelerating.
I am unclear if this is normal with a dual fuel conversion or if it valve wear? basically it sounds like a diesel engine!!!
Hope some one can whisper some words of wisdom?
With Thanks,
Paul

[JamesH]

Hi RockItMan,

Give some more details of the setup if you can. What year is your grand, what mileage, what type of LPG system (brand, single or multipoint etc.) how long/miles has it been fitted.

I'm sure we can help but the more info the better  

 

[tim_aka_tim]

Can you also confirm the engine size...... the ZJ never got a v6, just a 4l I6 and a 5.2 V8 (over here).

[chrisjones]

If it's the straight 6 4L then it could be a cracked exhaust manifold.  It's a common problem and causes a ticking noise that sounds very much like noisy tappets.

The straight 6 engines don't tend to suffer from top end noise, but have often been mis-diagnosed because of a cracked manifold.