I would be looking very closely at the exhaust header for a crack. They
do crack and make a lifter ticking noise at first.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Mick Miller wrote:
>
> i am no getting a missfire.
>
> no smoke no loss of power...other than a bit of throttle crispness
>
> ........just this tappet like noise when reved ......
>
> >The only way valve springs can make noise is if they're broken. If that's the
> >case, noise will be the least of your worries.
> >
> >More likely lifters are the cause. I think I'd try an additive like "Lifter
> >Free" before replacing them. Might save a few bucks if it works.
> >
> >The valve spring replacement that others have referenced here was only a part of
> >the fix for misfire problems. The actual problem was carbon buildup on the
> >exhaust valves causing them to be "slow to close", thus causing a misfire.
> >Stronger valve springs were to help overcome this problem.
> >
> >
> >
> >In message <1hjm311gbbkbn8fc6c5obge4fna42m4bfu@4ax.com>, "Mick Miller" wrote:
> >
> >>
> >>I have a wrangler 4ltr with very noise valve springs (think this was a
> >>known problem)
> >>
> >>how easy are they to replace and does the head need to come off?
> >>