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timing belt question

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timing belt question - 7/13/2008 4:00:57 PM   
spiney norman

 

Posts: 11
Joined: 2/2/2008
Status: offline 		I picked up my 86 951 from its timing belt, water pump replacement. Other than hearing how many problems the mechanic had (cross threaded bolt in the water pump, balance shafts in wrong) and how he''s thinking of no longer working on 944''s, it went pretty smooth and the car runs great. (The lower radiator hose did blow on the way though).

My question is, what is the proper mileage for the re-tension?

The mechanic said that I should come in at 1500 miles then 2500 more miles and then at the 15000 mile service.

Thanks.
Post #: 1
RE: timing belt question - 7/14/2008 7:34:23 PM   
Fast951


Posts: 33
Joined: 7/4/2008
Status: offline 		Call me crazy, but with a 15K mile change interval that I follow religiously I don''t even bother to retension.  Same goes for the counter-balance shaft belt, especially when the tension is set properly at the change interval using the Porsche tool.

If you have a mechanic who is cross-threading bolts on your aluminum block engine it is most likely time for you to locate a better one.

(in reply to spiney norman)
Post #: 2
RE: timing belt question - 7/14/2008 8:59:09 PM   
spiney norman

 

Posts: 11
Joined: 2/2/2008
Status: offline 		Thanks for the information. This mechanic discovered the mistakes of my old mechanic who had disappeared off the face of the earth. Now I know why.

(in reply to Fast951)
Post #: 3
RE: timing belt question - 7/15/2008 8:52:36 AM   
Big Bob

 

Posts: 613
Joined: 9/7/2007
Status: offline
Big Bob's photo gallery 		One should always consider retorquing etc or re tensioning after fitting new parts.
The initial bedding in will take place quite quickly, and I would think you could do better with a check after 1500-2500 miles rather than wait the full 15K.
But that is based on general experience rather than specific 944 belt knowledge.
Big Bob  

_____________________________

Porshe 996 Carrera 2, Smart Roadster Coupe (120bhp), SL500 Mercedes, Mercedes ML420 CDI (360hp 840NM torque)

(in reply to spiney norman)
Post #: 4
RE: timing belt question - 7/15/2008 6:52:08 PM   
Fast951


Posts: 33
Joined: 7/4/2008
Status: offline 		In my humble opinion 15K just isn''''t enough mileage to worry about.  Considering "general automotive experience" think for a moment how many other manufacturers, German, Japanese or U.S. that require a retorque or retension after a timing belt replacement on their cars.  Few, if any.  And most of those belts go 60K - 90K between replacement.

I think it''''s a waste of time and money.  My cash stays in the wallet in this instance.

< Message edited by Fast951 -- 7/15/2008 8:11:28 PM >

(in reply to Big Bob)
Post #: 5
RE: timing belt question - 7/16/2008 6:44:48 AM   
Big Bob

 

Posts: 613
Joined: 9/7/2007
Status: offline
Big Bob's photo gallery 		Never confure Engineering principles with Customer Driven Service Intervals. Belts stretch most in the first few miles. 15K wont be a problem. But the engineering issues remain the same.
Big Bob

_____________________________

Porshe 996 Carrera 2, Smart Roadster Coupe (120bhp), SL500 Mercedes, Mercedes ML420 CDI (360hp 840NM torque)

(in reply to Fast951)
Post #: 6
RE: timing belt question - 7/16/2008 6:46:59 PM   
Fast951


Posts: 33
Joined: 7/4/2008
Status: offline 		I don''t have a clue what you''re talking about.  

(in reply to Big Bob)
Post #: 7
RE: timing belt question - 7/17/2008 1:01:43 PM   
Big Bob

 

Posts: 613
Joined: 9/7/2007
Status: offline
Big Bob's photo gallery 		Dont worry about it, it was probably bull sh** anyway.
Regards Big Bob

_____________________________

Porshe 996 Carrera 2, Smart Roadster Coupe (120bhp), SL500 Mercedes, Mercedes ML420 CDI (360hp 840NM torque)

(in reply to Fast951)
Post #: 8
RE: timing belt question - 9/22/2008 9:56:57 PM   
beefey

 

Posts: 6
Joined: 9/22/2008
Status: offline 		Jeepers I''m a decent home gamer but $500 factory tension tools pretty much scare me. I read that on the later models the self-tensioner did all the work for you with no need for this porsche tool propaganda? Is this false?

(in reply to Big Bob)
Post #: 9
RE: timing belt question - 9/23/2008 7:43:01 AM   
Fast951


Posts: 33
Joined: 7/4/2008
Status: offline 		Self tensioner is deployed on later models.

(in reply to beefey)
Post #: 10
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