Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: droidy on February 04, 2008, 08:54:13 PM

Title: tapping noise
Post by: droidy on February 04, 2008, 08:54:13 PM
hi guys.
 on my 97 2.5td xj i'm getting a tapping noise, it's worse when just started from cold but disappears after a few second, then it is always there when exelerating untill i get to 2000rpm then it goes. I have checked for play in the push rods as it sounds like a hydrolic tappet, i found a small amount of play in 3 of them so just removed rockers and turned push rods around. Cured the play but noise still there.
Do they have a hydrolic tensioner on the timming chain and are they common to go, or do you guys think this is a tappet problem.
Any help would be much needed as this noise is driving me mad.
cheers
P.S
transfer case chain was replaced in about 2 hour's, couldn't believe how easy it was. (i love jeep engineering)
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Post by: greggmo on February 04, 2008, 09:04:47 PM
does sound like a lazy hydraulic lifter but do they have then on the oil burner? i dont know.
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Post by: tim_aka_tim on February 04, 2008, 09:08:57 PM
Any other symptoms? Low power, misfiring, excessive smoke? (if so, what colour?)
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Post by: Mike Pavelin on February 04, 2008, 09:09:44 PM
Could be chuffin' from an exhaust manifold gasket.
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Post by: droidy on February 04, 2008, 09:13:03 PM
i thought about the manifold gskt  but noise seems more internal.
No lack of power or exesive smoke. still drives fine
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Post by: tim_aka_tim on February 04, 2008, 09:21:41 PM
Aside from a top end problem, could be an injector or injection jump issue. If it were me, I'd get my stethoscope on the engine.

Or you could do what I saw some knob cheeses doing today..... Running on front of a Ford Ka while his mate drove it slowly down the road with the bonnet up cus they were looking for a 'noise'.

Anyway, back to the point.....
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Post by: greggmo on February 04, 2008, 09:35:54 PM
Quote from: "tim_aka_tim"

Or you could do what I saw some knob cheeses doing today..... Running on front of a Ford Ka while his mate drove it slowly down the road with the bonnet up cus they were looking for a 'noise'.

Anyway, back to the point.....



 :lol:  :lol: was he runnin backwards :lol:
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Post by: tim_aka_tim on February 04, 2008, 09:38:17 PM
Quote from: "greggmo"
Quote from: "tim_aka_tim"

Or you could do what I saw some knob cheeses doing today..... Running on front of a Ford Ka while his mate drove it slowly down the road with the bonnet up cus they were looking for a 'noise'.

Anyway, back to the point.....


 :lol:  :lol: was he runnin backwards :lol:


He was running sideways against the wing. Obviously too clever to be in front as his mate, driving blind, approached a stationary volvo.
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Post by: wrangler on February 05, 2008, 05:44:27 AM
I get the same tapping noise, but when I open the door under the stairs and let my wife out it stops.   :twisted:  :twisted:  :twisted:  :twisted:  :twisted:  :twisted:  :twisted:
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Post by: Mick O on February 05, 2008, 08:37:45 AM
WOW  You have stairs in your Jeep :lol:  :lol:



 8)
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Post by: droidy on February 05, 2008, 08:13:05 PM
i,m having parameters of the injector pump checked next week, if the blokes diagnostic machine can read it.
My snap on machine will not read it or the crypton at work doesn't even list a jeep xj diesel.
I think it may be over fueling on start up when cold, but if it was all the time it would knock not tap.
does the jeep have a hydrolic timing chain tensioner or are they done with a spring?
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Post by: tag on February 05, 2008, 08:54:42 PM
Yeah it's a spring chain tensioner i replaced mine as the jeep developed a rattle at idle ,(http://http://birtydastardsjeepclub.com/forum/userpix/627_Picture_012_1.jpg)