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Brief rattle at start up.

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Old May 6, 2023 | 10:11 PM
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Brief rattle at start up.

So I picked up a 2000 SE auto trans 210k miles no rust Oklahoma car for 500 bucks. It had what the original owner thought to be timing chain noise and a super bad valve cover gasket leak.
Anyways I thought timing chain tensioner as well when looking at it before purchasing I did not have my stethoscope on me and no way to pop the inspection cover.

My intention was to do an engine swap but I got it home and removed the belt and started it and no noise at all so if I could squeeze a few more miles outta the old 3.0 I wouldn't mind at all as the car drives good.

It Ended up being the alternator making the racket which was caused by oil leaking into it.
The next time I started it to move the car out of my way I noticed what I can only describe as the lifter rattle you would hear in a pushrod Chevy motor when the lifters bleed down over night.

It only happens for a split second when the engine first starts and the RPMs shoot up for a split second and settle back down.
My question is if this could be a timing chain/tensioner or valve train ? Does not do it while running just at start up hot or cold it's like as soon as it builds oil pressure it's gone like lifters not staying pumped up. Any advice would be welcome this is my first maxima.
Old May 7, 2023 | 07:50 AM
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on my 02 it did that for 10 years, from the time I got it with 175,XXX miles until I pulled the motor 2 months ago still running strong at 330,000 miles to do a 7th gen swap.

I believe i read somewhere that when you start having timing issues from chain slack you will get an engine code for it.
Old May 7, 2023 | 09:50 AM
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What oil viscosity are you using?
Old May 8, 2023 | 10:42 PM
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Originally Posted by Turbobink
What oil viscosity are you using?
I have no clue what type of oil is in it at the moment i literally drove it 2 miles home last Friday and haven't had a chance to touch it since discovering that the AC compressor must be unbolted and a wheel removed to access alternator for removal lol any suggestions on oil type I know what Google says but would rather hear it from an actual human that has experience with them. Parts are being delivered tomorrow so I can replace the valve cover gaskets, spark plugs and coil boots just general tune up items, I tossed in a Haynes manual for some light reading as well. I hope i won't have to replace the covers to stop the oil leaks I would assume that's related to the engines equiped with plastic covers from what I'm reading. All gaskets I'm using are fel pro I've had good luck with them in the past. I am going to inspect cam wear and maybe poke a camera into the timing inspection cover. I'm just pretty astounded by the amount of miles these cars live for. Unheard of in a Gm product


Last edited by Oklahoma; May 8, 2023 at 10:46 PM.
Old May 8, 2023 | 10:52 PM
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Originally Posted by Turbobink
What oil viscosity are you using?
Originally Posted by uptownsamcv
on my 02 it did that for 10 years, from the time I got it with 175,XXX miles until I pulled the motor 2 months ago still running strong at 330,000 miles to do a 7th gen swap.

I believe i read somewhere that when you start having timing issues from chain slack you will get an engine code for it.
Wow 330,000 miles that's freaking excellent. So what causes the oil consumption issues in these engines I'm finding mixed information some one said pre cats and others say valve seals. I would lean towards valve seals personally if the compression is in spec.
Old May 8, 2023 | 10:52 PM
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Originally Posted by Turbobink
What oil viscosity are you using?
Originally Posted by uptownsamcv
on my 02 it did that for 10 years, from the time I got it with 175,XXX miles until I pulled the motor 2 months ago still running strong at 330,000 miles to do a 7th gen swap.

I believe i read somewhere that when you start having timing issues from chain slack you will get an engine code for it.
Wow 330,000 miles that's freaking excellent. So what causes the oil consumption issues in these engines I'm finding mixed information some one said pre cats and others say valve seals. I would lean towards valve seals personally if the compression is in spec.
Old May 12, 2023 | 09:48 AM
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i heard piston rings and valve seals but I wouldn't doubt if a good amount just gets sucked in through the PCV system....
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