06-09-2012, 06:44 AM
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#1
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Registered User
Join Date: Apr 2012
Location: Atlanta
Posts: 33
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Rattle on startup- worry?
97 with only about 75k on it. Noob owner. Recent acquisition, previous owner promised service records but can't "find" them.
Runs like a top, soon to be doining fluid changes just to be sure they are done.
About 50% of the time on cold startup there is a short "rattle" on startup. Goes away running, warm start not present. I've owned a few Mercedes and that sound usually means worn timing chain-possible catastrophic outcome.
Don't know enough about mine to even know if a timing chain exists on these but I would appreciate it if someone could tell me if the sound I am hearing is potentially problematic.
Thanks.
Jb
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06-09-2012, 06:58 AM
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#2
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Registered User
Join Date: Feb 2010
Location: Phoenix, Arizona Baby
Posts: 495
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Welcome. I have a 97 as well and mine does the same thing. Search for "noise on startup" and read what comes up. There are a few threads on it. Its normal (from what I understand) and as soon as the oil lubricates the chain your noise should go away. Hope I am right by what I just said.
LOL I am no pro but this site is incredible. Again, welcome and heres to many more miles.
Post some pics too.
__________________
2006 Hummer H3 - RED 76k mi - LIFTED - 3rd row custom seating on 35's and a manual tranny.
1997 Boxster Guards - RED 86k mi - 19" Lobster Claw Wheels on Conti's , Porsche side decal for extra "speed", manual tranny -signed by Hurley Haywood
Phoenix, Arizona
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06-09-2012, 07:04 AM
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#3
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Registered User
Join Date: Nov 2009
Location: Winnipeg MB
Posts: 2,485
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I'm going to hazard a guess that you are using Mobil1 0W40 oil. Try swapping to Castrol Syntech (now Edge) 5W40. A lot of us have found that gets rid of the start-up rattle.
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'99 black 986
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06-09-2012, 07:55 AM
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#4
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Registered User
Join Date: May 2010
Location: UK
Posts: 874
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Intermittent brief rattle on cold starts is normal.
Next!
Good luck with the car. Bought a '97 with 75k on it myself two years ago. Two years later on `03k and enjoying it more all the time.
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Manual '00 3.2 S Arctic Silver
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06-09-2012, 08:16 AM
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#5
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Registered User
Join Date: Aug 2011
Location: Neither here, nor there...
Posts: 458
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I don't believe it's the Castrol vs Mobil that makes the difference, rather the 5W vs the 0W?
Two oil changes ago I used Mobil 0W-40. Last oil change I used Castrol Edge 5W-40. I don't think I notice any change in start-up rattle. If it's there (change), it's very suttle. At least, in my car.
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06-09-2012, 08:28 AM
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#6
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Registered User
Join Date: Jan 2012
Location: Kuna Idaho
Posts: 236
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Three of us also have up here in Boise (all about the same year car as you). I only have 30,000 miles on mine and have had it since I got the car. No worries after reading other threads on the site.
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06-09-2012, 10:09 AM
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#7
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Registered User
Join Date: Apr 2012
Location: Atlanta
Posts: 33
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Dang 97 Boxster, yours and mine are red twins.
Never wanted a red car but liking more every day.
Thanks to all. (it appears from the spare quart inthe trunk that it does have Mobil 1 oil inside)
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06-09-2012, 04:46 PM
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#8
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Registered User
Join Date: May 2010
Location: UK
Posts: 874
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Make that triplets, here's mine.
__________________
Manual '00 3.2 S Arctic Silver
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06-10-2012, 06:07 AM
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#9
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Registered User
Join Date: Apr 2012
Location: Carnation, WA
Posts: 136
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Quote:
Originally Posted by pothole
Make that triplets, here's mine.
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Beautiful. 15 years old, and looks brand new.
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06-10-2012, 02:46 PM
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#10
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jakesbox
Join Date: Apr 2012
Location: Charlotte NC
Posts: 759
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I took mind to a P dealer for this reason and they said that tattle on start is normal.
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06-11-2012, 12:14 PM
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#11
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Registered User
Join Date: May 2012
Location: Somerset MA
Posts: 70
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I have this same problem on my 02 boxster 2.7 with 146k miles.
I work for a service department at a Volkswagen dealership, and this sound is IDENTICAL, to the sound of a camshaft chain tensioner on a 1.8turbo Volkswagen engine. When the chain tensioner gets old it creates this noise upon startup. On the Volkswagens, this is typically because the tensioner is about to let go, seems like on the Porsche engine though this isnt the case.
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06-09-2012, 05:02 PM
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#12
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Registered User
Join Date: May 2011
Location: Miami florida
Posts: 1,591
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I have the clatter on start up, both cold, hot. I've tried different oil viscosities, from 0-40 to 20-50 with no change. I've also replaced the IMS and bank 1-3 chain tensioners with no change. It only lasts for a fraction of a second. I'll live with it.
__________________
Current car
2000 Boxster 2.7l red/black
Previous cars
1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
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