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Old 05-11-2018, 06:07 PM   #1
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start up rattle

My 2000 boxster s has the cold start up rattle that many have reported. It only does it the first start of the day. I think it is a chain tensioner (all three are new) bleeding down or lifters bleeding down. Can an oil pressure release valve cause this noise? The noise is loud and i would really like to fix it. Verio cam tensioners and pads are also new.
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Old 05-11-2018, 06:24 PM   #2
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I had a similar noise after my car sat for a few days. In my case, replacing the filter housing (with it’s integrated valve) solved the problem. About $20 with filter from pelican last I checked.
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Old 05-12-2018, 06:29 AM   #3
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Originally Posted by Rich XTR View Post
My 2000 boxster s has the cold start up rattle that many have reported. It only does it the first start of the day. I think it is a chain tensioner (all three are new) bleeding down or lifters bleeding down. Can an oil pressure release valve cause this noise? The noise is loud and i would really like to fix it. Verio cam tensioners and pads are also new.
I would like to find a solution to this as well. I have replaced all three chain tensioners and the vario cam tensioners and pads (for other reasons). I have a new oil pressure release valve to install. If anything I think the startup rattle is worse after replacing the tensioners. I also installed a spin on oil filter adapter.

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Old 05-12-2018, 06:57 AM   #4
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Originally Posted by Stroked & Blown View Post
I had a similar noise after my car sat for a few days. In my case, replacing the filter housing (with itís integrated valve) solved the problem. About $20 with filter from pelican last I checked.
Interested to hear if this is something others have done. Filter housing as is in the plastic cartridge cover? From what I hear the lifter noise is normal due to the boxer engine design.
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Old 05-12-2018, 07:25 AM   #5
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Cold start rattle is normal....

...it takes a few seconds for the tensioners to pump up with oil.

First Gen Miatas have a lifter tick on cold start up.

Nothing to worry about.
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Old 05-12-2018, 04:09 PM   #6
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Mine does the same thing too. Iím still running the original tensioners, but Iím using an LN spin on adapter. If it sits a couple of days it does the rattle thing.
It almost seems like the early 5 chain engines make the start up rattle more than the later engines.
I cringe when it rattles, so I turn the key until it just fires and the shut it down. I do this three times to prime the tensioners and it doesnít rattle.
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Old 05-13-2018, 03:44 PM   #7
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https://www.youtube.com/watch?v=7mAuOw7dvYw

Is this the noise that others are hearing and recommend don't worry? Assuming these cars didn't do this new...we can fix them.

Last edited by Rich XTR; 05-13-2018 at 04:08 PM.
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Old 05-13-2018, 09:40 PM   #8
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Originally Posted by BoxsterSteve View Post
Mine does the same thing too. Iím still running the original tensioners, but Iím using an LN spin on adapter. If it sits a couple of days it does the rattle thing.
It almost seems like the early 5 chain engines make the start up rattle more than the later engines.
I cringe when it rattles, so I turn the key until it just fires and the shut it down. I do this three times to prime the tensioners and it doesnít rattle.
Thatís seems more harsh than simply letting it do its thing. Mine ďrattlesĒ for about 1-2 seconds if that. Lots of chains to be moving around all at once. Not a worry.
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Old 05-14-2018, 01:52 AM   #9
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I get some lifter ticking for about a minute when I crank up. I read that this is inherit issue for flat 6 motors, do to the orientation the oil leaks down. Same reason they have a little smoking the oil collects in the cylinder when it sits awhile.
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Old 05-14-2018, 01:54 AM   #10
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Originally Posted by Rich XTR View Post
https://www.youtube.com/watch?v=7mAuOw7dvYw

Is this the noise that others are hearing and recommend don't worry? Assuming these cars didn't do this new...we can fix them.
That is much harsher than what I get, that almost sounds like starter grinding.
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Old 05-14-2018, 10:37 PM   #11
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https://www.youtube.com/watch?v=7mAuOw7dvYw

Is this the noise that others are hearing and recommend don't worry? Assuming these cars didn't do this new...we can fix them.
Yes, pretty much. Hard to tell in the video.

Last edited by Geof3; 05-14-2018 at 10:39 PM.
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Old 05-16-2018, 06:43 PM   #12
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How long does it go?

How long are people having this start up rattle? I was having it for about a second, and then it goes away.
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Old 01-09-2019, 06:53 AM   #13
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Yes, pretty much. Hard to tell in the video.
Mine is doing the same thing too. Does anyone know if this is something that needs to be fixed, or is it just a character of the engine?
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Old 01-13-2019, 05:23 AM   #14
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Check the two exhaust heat shields. They can rattle on start up.
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Old 01-13-2019, 09:35 AM   #15
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I don't know if it was a "seat of my pants" experience... but when recently I replaced the pressure relief valve with the updated/upgraded part I swear that rattle was recognizably less audible, and has continued to be so. I drive the car about 3 times a month (for now).

Someone tell me I'm hearing things, or second my assumption.

Thank you.
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Old 01-14-2019, 07:37 AM   #16
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Originally Posted by jayspeed999 View Post
Mine is doing the same thing too. Does anyone know if this is something that needs to be fixed, or is it just a character of the engine?
Yes it needs to be fixed, that's why Porsche reengineered the part in 2001 or 2002 with a integral spring to pre-tension the chain. there is a TSB that explains the issue & new part number. If you buy a new one from a dealer for a older Porsche you may get the original non-updated part.
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