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07-19-2005, 11:56 PM
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#1
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valve tap rick or corey
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well my dads 1995 nissan pickup has valve tap, i replaced the exhaust maniflod because it was cracked so i thought that would fix the problem but it has not. Its just the same, do you think the cats can be the culprit? |
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07-20-2005, 01:09 AM
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#2
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07-20-2005, 07:23 AM
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#3
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Taking life one day at a time
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No probably not the cats if there is no leak. Easiest thing to do is check the valve train by replacing the oil with a high mileage oil. If the ticking disappears or quiets a lot then you know you have something worn in the valvetrain. My wife's 2.5 engine in her Mazda 626 was making a tapping noise and it would get loud when it was time to change the oil. It was the lifters.
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07-20-2005, 09:22 AM
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#4
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what is this bat you speak of?
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Dunno about your specific truck, but the Japanese used solid lifter cams for a lot longer than the American manufacturers. My wife's 626 had them and I could always tell when they needed adjustments, you couldn't squeal th etires from a stop when they needed adjustment. That would happen long before they started to tap. It could be that.
Other than that, a quart of Marvel Mystery oil inthe crankcase will usually clean up varnished hydraulic lifters right quick.
Steve
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1996 Mustang
1965 Barracuda
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07-20-2005, 11:44 AM
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#5
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so i will change the oil now see what happens, then i will see if a friend can adjust the valve train. What caused the manifold to crack in the first place? |
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07-20-2005, 12:51 PM
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#6
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Taking life one day at a time
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Where did it crack. Typically it will be do to a casting flaw or a bolt over tightened and during heat a contraction crack out from the bolt
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07-20-2005, 10:23 PM
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#7
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from the middle of the two collectors, but it cracked on its own, i didnt touch it when it cracked, i just hr=eard valve tap so i checked the exhaust manifold and sure enough it was cracked so i replaced it but it did not stop the valve tap. so what do i do guys? |
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07-20-2005, 10:47 PM
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#8
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The 4.2L Guy
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try the oil route first. Otherwise if that doesn't work, you may need to replace the lifters.
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60' ~ 2.1, 1/8 ~ 9.61 @ 73.4mph
Living one day at a time!
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07-20-2005, 10:56 PM
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#9
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i will do oil change tomorrow, i really do not want to replace lifters on such an old truck. |
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07-20-2005, 11:55 PM
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#10
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what is this bat you speak of?
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Before you change anything find out if the truck has solid or hydraulic lifters.
If they are solids you need to adjust them, doing anything else is pissing away money.
If you don't know the difference step away from the tool box.
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1996 Mustang
1965 Barracuda
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07-21-2005, 12:28 AM
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#11
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the oil change will be done tommorow then i will see about the valvetrain. |
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07-21-2005, 12:33 AM
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#12
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im going to call the dealer to see if they are solid or hydraulic because i dont have acces to "Alldata" at the moment (i really should get the damn program) and im not about to take shit apart when i can just call. |
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07-21-2005, 10:41 PM
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#13
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COOL!the lifters are solid, they will be able to be adjusted. anyone know of any tricks to get the codes out of this truck without a scanner, you know like on chrystlers in which you can turn the key three times then you turn it on and the check engine light flashes to give you codes. there prolly is not a way but i can try. |
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07-22-2005, 10:59 AM
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#14
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what is this bat you speak of?
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I dunno any free tricks but it might be OBDII compliant, some 95's are, and autozone can pull them.
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1996 Mustang
1965 Barracuda
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07-22-2005, 12:02 PM
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#15
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it might be i have not checked, i just immediatly thought 95=obd 1, even though some cars have had obd 2 since 94. |
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07-22-2005, 01:01 PM
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#16
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Taking life one day at a time
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Some had it in 94 others in 95 all have it in 96. It was Federal Law
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07-29-2005, 09:52 PM
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#17
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well i replaced the lifters because they were hydraulic. the sound is gone 
but the engine kind of sputters at idle like if it wants to turn off, whats the prob here?
Last edited by STEVE; 07-30-2005 at 01:41 AM..
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07-29-2005, 09:56 PM
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#18
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oh yeah and i started putting in high mialege oil |
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07-30-2005, 01:41 AM
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#19
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where you at corey? steve ?rick? |
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07-30-2005, 03:00 AM
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#20
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what is this bat you speak of?
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Well, if I was to take a stab in the dark I'd say a vacuum line got knocked off, but your discriptive is too general to really help us help you.
Steve
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1996 Mustang
1965 Barracuda
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07-30-2005, 03:02 AM
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#21
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hmm maybe let me check all vaccume lines around the area in the engine where i worked. thanks. |
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07-30-2005, 10:07 AM
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#22
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Taking life one day at a time
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Here I am!!!  I agree with Steve on this. It sounds like a vacuum line but it could also be a bad plug wire or a dirty IAC.
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