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Old 07-19-2005, 10:56 PM   #1
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valve tap rick or corey

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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Old 07-20-2005, 12:09 AM   #2
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c'mon *****es help me.
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Old 07-20-2005, 06:23 AM   #3
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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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Old 07-20-2005, 08:22 AM   #4
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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.

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Old 07-20-2005, 10:44 AM   #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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Old 07-20-2005, 11:51 AM   #6
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Quote:
Originally Posted by 232stang
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?
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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Old 07-20-2005, 09:23 PM   #7
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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
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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Old 07-20-2005, 09:47 PM   #8
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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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Old 07-20-2005, 09:56 PM   #9
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try the oil route first. Otherwise if that doesn't work, you may need to replace the lifters.
i will do oil change tomorrow, i really do not want to replace lifters on such an old truck.
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Old 07-20-2005, 10:55 PM   #10
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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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Old 07-20-2005, 11:28 PM   #11
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the oil change will be done tommorow then i will see about the valvetrain.
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Old 07-20-2005, 11:33 PM   #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 **** apart when i can just call.
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Old 07-21-2005, 09:41 PM   #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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Old 07-22-2005, 09:59 AM   #14
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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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Old 07-22-2005, 11:02 AM   #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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Old 07-22-2005, 12:01 PM   #16
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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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Old 07-29-2005, 08:52 PM   #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?
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Old 07-29-2005, 08:56 PM   #18
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oh yeah and i started putting in high mialege oil
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Old 07-30-2005, 12:41 AM   #19
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where you at corey? steve ?rick?
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Old 07-30-2005, 02:00 AM   #20
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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.

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Old 07-30-2005, 02:02 AM   #21
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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
hmm maybe let me check all vaccume lines around the area in the engine where i worked. thanks.
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Old 07-30-2005, 09:07 AM   #22
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Quote:
Originally Posted by 232stang
hmm maybe let me check all vaccume lines around the area in the engine where i worked. thanks.
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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Old 07-30-2005, 10:09 AM   #23
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i will check all those today
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Old 08-02-2005, 09:17 PM   #24
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Re: valve tap rick or corey

well?
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Old 08-02-2005, 09:23 PM   #25
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Re: valve tap rick or corey

under the support for the air filter there was a loose vacuum line, i just connected it good and its working great. thanks alot guys.
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Old 08-02-2005, 09:30 PM   #26
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Re: valve tap rick or corey

Sounds like you have it fixed, I just now saw and read the thread.
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Old 08-02-2005, 09:44 PM   #27
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Re: valve tap rick or corey

Glad we found it.

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Old 08-02-2005, 10:00 PM   #28
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Re: valve tap rick or corey

the truck is now running beutiful, you guys rule.
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