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1997 NISSAN SENTRA 1.6 UPPER TIMING CHAIN

 
WCM111
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      14th January 2007, 12:59 PM
Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
engine as it was making a “clacking noise”. Popped the valve cover and
discovered a lot of slack in the upper timing chain. Gears, chain and cams
look very good. Engine very clean and oil changed regularly.

Questions:
1) Have these engines had a history with the upper tensioners going bad?
2) Is the timing chain cover one piece or two piece?
3) What is the procedure to keep engine timed?
4) Are the cam/idler gears marked?

Also, looking for advise/directions/procedures from A to Z on how to replace
the upper tensioner and/or timing chain and gears. Please advise.

Thank you in advance for any help you can offer,
Bill

 
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al
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      17th January 2007, 03:50 AM
Is the noise occuring at all times? Or is it present only during a
cold start? I just bought a 1999 Sentra with the 1.6L that has a
scraping/screeching sort of sound for a second or two on cold start-up
only. Then it disappears. I'm told it might be the tensioners so I'm
watching it carefully and have switched to full synthetic 5W30 oil.
The factory service manual only describes changing both chains and both
tensioners which requires head removal. It looks like one could change
the upper tensioner alone without removing the head or the lower chain
cover. But I haven't done it so I can't be certain. Al

WCM111 wrote:
> Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
> engine as it was making a "clacking noise". Popped the valve cover and
> discovered a lot of slack in the upper timing chain. Gears, chain and cams
> look very good. Engine very clean and oil changed regularly.
>
> Questions:
> 1) Have these engines had a history with the upper tensioners going bad?
> 2) Is the timing chain cover one piece or two piece?
> 3) What is the procedure to keep engine timed?
> 4) Are the cam/idler gears marked?
>
> Also, looking for advise/directions/procedures from A to Z on how to replace
> the upper tensioner and/or timing chain and gears. Please advise.
>
> Thank you in advance for any help you can offer,
> Bill


 
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E Meyer
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      17th January 2007, 05:16 AM
Its much more likely that your screech on cold start is a lose or glazed
accessory belt, pulley or belt tensioner. Change the belts and check the
pulleys before you start tearing into the timing chain.

It could also be the starter failing to disengage immediately when the
engine starts. Maximas are known for this problem when the starter gets old
and tired.


On 1/16/07 9:50 PM, in article
(E-Mail Removed) om, "al" <(E-Mail Removed)>
wrote:

> Is the noise occuring at all times? Or is it present only during a
> cold start? I just bought a 1999 Sentra with the 1.6L that has a
> scraping/screeching sort of sound for a second or two on cold start-up
> only. Then it disappears. I'm told it might be the tensioners so I'm
> watching it carefully and have switched to full synthetic 5W30 oil.
> The factory service manual only describes changing both chains and both
> tensioners which requires head removal. It looks like one could change
> the upper tensioner alone without removing the head or the lower chain
> cover. But I haven't done it so I can't be certain. Al
>
> WCM111 wrote:
>> Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
>> engine as it was making a "clacking noise". Popped the valve cover and
>> discovered a lot of slack in the upper timing chain. Gears, chain and cams
>> look very good. Engine very clean and oil changed regularly.
>>
>> Questions:
>> 1) Have these engines had a history with the upper tensioners going bad?
>> 2) Is the timing chain cover one piece or two piece?
>> 3) What is the procedure to keep engine timed?
>> 4) Are the cam/idler gears marked?
>>
>> Also, looking for advise/directions/procedures from A to Z on how to replace
>> the upper tensioner and/or timing chain and gears. Please advise.
>>
>> Thank you in advance for any help you can offer,
>> Bill

>


 
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al
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      18th January 2007, 02:35 AM

Thanks much. I intended to do the belts in order to eliminate that
possibility. I have thought that it could be the starter too as it
sounds somewhat like the starter. That's not so easy to test and I'd
rather not just replace the starter with a rebuilt one as rebuilt
starters are often a crapshoot.

E Meyer wrote:
> Its much more likely that your screech on cold start is a lose or glazed
> accessory belt, pulley or belt tensioner. Change the belts and check the
> pulleys before you start tearing into the timing chain.
>
> It could also be the starter failing to disengage immediately when the
> engine starts. Maximas are known for this problem when the starter gets old
> and tired.
>
>
> On 1/16/07 9:50 PM, in article
> (E-Mail Removed) om, "al" <(E-Mail Removed)>
> wrote:
>
> > Is the noise occuring at all times? Or is it present only during a
> > cold start? I just bought a 1999 Sentra with the 1.6L that has a
> > scraping/screeching sort of sound for a second or two on cold start-up
> > only. Then it disappears. I'm told it might be the tensioners so I'm
> > watching it carefully and have switched to full synthetic 5W30 oil.
> > The factory service manual only describes changing both chains and both
> > tensioners which requires head removal. It looks like one could change
> > the upper tensioner alone without removing the head or the lower chain
> > cover. But I haven't done it so I can't be certain. Al
> >
> > WCM111 wrote:
> >> Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
> >> engine as it was making a "clacking noise". Popped the valve cover and
> >> discovered a lot of slack in the upper timing chain. Gears, chain and cams
> >> look very good. Engine very clean and oil changed regularly.
> >>
> >> Questions:
> >> 1) Have these engines had a history with the upper tensioners going bad?
> >> 2) Is the timing chain cover one piece or two piece?
> >> 3) What is the procedure to keep engine timed?
> >> 4) Are the cam/idler gears marked?
> >>
> >> Also, looking for advise/directions/procedures from A to Z on how to replace
> >> the upper tensioner and/or timing chain and gears. Please advise.
> >>
> >> Thank you in advance for any help you can offer,
> >> Bill

> >


 
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E Meyer
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Posts: n/a
 
      18th January 2007, 02:50 PM
If it does turn out to be the starter, spend the extra $$ and go OEM. In
the long run its less hassle than replacing 3 or 4 rebuilts until you get
one that actually works.


On 1/17/07 8:35 PM, in article
(E-Mail Removed) om, "al" <(E-Mail Removed)>
wrote:

>
> Thanks much. I intended to do the belts in order to eliminate that
> possibility. I have thought that it could be the starter too as it
> sounds somewhat like the starter. That's not so easy to test and I'd
> rather not just replace the starter with a rebuilt one as rebuilt
> starters are often a crapshoot.
>
> E Meyer wrote:
>> Its much more likely that your screech on cold start is a lose or glazed
>> accessory belt, pulley or belt tensioner. Change the belts and check the
>> pulleys before you start tearing into the timing chain.
>>
>> It could also be the starter failing to disengage immediately when the
>> engine starts. Maximas are known for this problem when the starter gets old
>> and tired.
>>
>>
>> On 1/16/07 9:50 PM, in article
>> (E-Mail Removed) om, "al" <(E-Mail Removed)>
>> wrote:
>>
>>> Is the noise occuring at all times? Or is it present only during a
>>> cold start? I just bought a 1999 Sentra with the 1.6L that has a
>>> scraping/screeching sort of sound for a second or two on cold start-up
>>> only. Then it disappears. I'm told it might be the tensioners so I'm
>>> watching it carefully and have switched to full synthetic 5W30 oil.
>>> The factory service manual only describes changing both chains and both
>>> tensioners which requires head removal. It looks like one could change
>>> the upper tensioner alone without removing the head or the lower chain
>>> cover. But I haven't done it so I can't be certain. Al
>>>
>>> WCM111 wrote:
>>>> Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a
>>>> 1.6
>>>> engine as it was making a "clacking noise". Popped the valve cover and
>>>> discovered a lot of slack in the upper timing chain. Gears, chain and cams
>>>> look very good. Engine very clean and oil changed regularly.
>>>>
>>>> Questions:
>>>> 1) Have these engines had a history with the upper tensioners going bad?
>>>> 2) Is the timing chain cover one piece or two piece?
>>>> 3) What is the procedure to keep engine timed?
>>>> 4) Are the cam/idler gears marked?
>>>>
>>>> Also, looking for advise/directions/procedures from A to Z on how to
>>>> replace
>>>> the upper tensioner and/or timing chain and gears. Please advise.
>>>>
>>>> Thank you in advance for any help you can offer,
>>>> Bill
>>>

>


 
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al
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      19th January 2007, 05:15 AM
Yes, I'm not enthusiastic about rebuilds. Advance Auto now offers a
line of brand name (e.g. Bosch, Beck Arnley) remanufactured starters
offering strong warrenties. I've had very good luck with Advance Auto
stuff but I've heard so many horror stories about bebuilds that I'm not
sure I trust anybody. Thanks again. Al

al wrote:
> Thanks much. I intended to do the belts in order to eliminate that
> possibility. I have thought that it could be the starter too as it
> sounds somewhat like the starter. That's not so easy to test and I'd
> rather not just replace the starter with a rebuilt one as rebuilt
> starters are often a crapshoot.
>
> E Meyer wrote:
> > Its much more likely that your screech on cold start is a lose or glazed
> > accessory belt, pulley or belt tensioner. Change the belts and check the
> > pulleys before you start tearing into the timing chain.
> >
> > It could also be the starter failing to disengage immediately when the
> > engine starts. Maximas are known for this problem when the starter gets old
> > and tired.
> >
> >
> > On 1/16/07 9:50 PM, in article
> > (E-Mail Removed) om, "al" <(E-Mail Removed)>
> > wrote:
> >
> > > Is the noise occuring at all times? Or is it present only during a
> > > cold start? I just bought a 1999 Sentra with the 1.6L that has a
> > > scraping/screeching sort of sound for a second or two on cold start-up
> > > only. Then it disappears. I'm told it might be the tensioners so I'm
> > > watching it carefully and have switched to full synthetic 5W30 oil.
> > > The factory service manual only describes changing both chains and both
> > > tensioners which requires head removal. It looks like one could change
> > > the upper tensioner alone without removing the head or the lower chain
> > > cover. But I haven't done it so I can't be certain. Al
> > >
> > > WCM111 wrote:
> > >> Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
> > >> engine as it was making a "clacking noise". Popped the valve cover and
> > >> discovered a lot of slack in the upper timing chain. Gears, chain and cams
> > >> look very good. Engine very clean and oil changed regularly.
> > >>
> > >> Questions:
> > >> 1) Have these engines had a history with the upper tensioners going bad?
> > >> 2) Is the timing chain cover one piece or two piece?
> > >> 3) What is the procedure to keep engine timed?
> > >> 4) Are the cam/idler gears marked?
> > >>
> > >> Also, looking for advise/directions/procedures from A to Z on how to replace
> > >> the upper tensioner and/or timing chain and gears. Please advise.
> > >>
> > >> Thank you in advance for any help you can offer,
> > >> Bill
> > >


 
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codifus@optonline.net
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      19th January 2007, 02:19 PM

WCM111 wrote:
> Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
> engine as it was making a "clacking noise". Popped the valve cover and
> discovered a lot of slack in the upper timing chain. Gears, chain and cams
> look very good. Engine very clean and oil changed regularly.
>
> Questions:
> 1) Have these engines had a history with the upper tensioners going bad?
> 2) Is the timing chain cover one piece or two piece?
> 3) What is the procedure to keep engine timed?
> 4) Are the cam/idler gears marked?
>
> Also, looking for advise/directions/procedures from A to Z on how to replace
> the upper tensioner and/or timing chain and gears. Please advise.
>
> Thank you in advance for any help you can offer,
> Bill

You can download the factory service manual for the 96 here (the 95-99
Sentra 1.6s are 99% the same GA16DE with the expected differences in
emissions related changes);

http://www.nissanforums.com/b14-95-9...ce-manual.html

Take care of your 1.6. I wasn't so lucky.

CD

 
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WCM111 via CarKB.com
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      20th January 2007, 03:49 PM
CD - Greatly appreciate the help!

Bill

(E-Mail Removed) wrote:
>> Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
>> engine as it was making a "clacking noise". Popped the valve cover and

>[quoted text clipped - 12 lines]
>> Thank you in advance for any help you can offer,
>> Bill

>You can download the factory service manual for the 96 here (the 95-99
>Sentra 1.6s are 99% the same GA16DE with the expected differences in
>emissions related changes);
>
>http://www.nissanforums.com/b14-95-9...ce-manual.html
>
>Take care of your 1.6. I wasn't so lucky.
>
>CD


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Codifus
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      21st January 2007, 02:51 PM
WCM111 via CarKB.com wrote:
> CD - Greatly appreciate the help!
>
> Bill
>
> (E-Mail Removed) wrote:
>
>>>Suspected a timing chain problem on my 1997 Nissan Sentra with 128K and a 1.6
>>>engine as it was making a "clacking noise". Popped the valve cover and

>>
>>[quoted text clipped - 12 lines]
>>
>>>Thank you in advance for any help you can offer,
>>>Bill

>>
>>You can download the factory service manual for the 96 here (the 95-99
>>Sentra 1.6s are 99% the same GA16DE with the expected differences in
>>emissions related changes);
>>
>>http://www.nissanforums.com/b14-95-9...ce-manual.html
>>
>>Take care of your 1.6. I wasn't so lucky.
>>
>>CD

>
>

No problem. Let us know how it turns out.

CD
 
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WCM111 via CarKB.com
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      21st January 2007, 06:45 PM
CD - It turned out to be the upper timing chain tensioner. Also, found out
that the 1996 Nissan 1.6 engine only has one timing chain; not two. Mine is
a 1997 (thank God).

FYI . . . For future threads concerning the same problem, the upper tensioner,
upper timing chain and both cam sprockets can be replaced by removing the
valve cover and upper timing chain cover. The cylinder head does not have to
be removed. To get at the timing chain cover, you do need to support the
engine, remove the right upper motor mount and accompnying bracket. The
windshield washer tank and accompanying hold down also has to be removed to
get the bolt out of the upper motor mount. Not really a bad job. The Nissan
enginneer used his head when he designed this engine so that you could easily
get at the upper end of the engine without removing the whole timing chain
cover or the cylinder head.

Regards and thanks again,
Bill

Codifus wrote:
>> CD - Greatly appreciate the help!
>>

>[quoted text clipped - 17 lines]
>>>
>>>CD

>
>No problem. Let us know how it turns out.
>
>CD


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