Menu toggle

crankshaft help

futurechris

futurechris

New member
HI all, the big end bearing has gone on my 997 and apparently the crankshaft on journal 3 is beyond repair, i am not a mechanic but the car is now in bits as a garage took it apart and couldnt put it back together again for me! can anyone help as i currently have a box of bits ! chris
 
What the hell is a garage doing taking something apart they can't either fix OR put back together! I'm assuming they said they could do it in order to get this far!? FFS

depending on where in the country you are this will cost you a boat load. The numpties who've got it in bits will add insult to injury by charging for the time they've spent making a mess before they release it, then you're looking at getting to somewhere like Hartech or Autofarm to confirm the diagnosis and repair it.

This has made me so cross!
 
I wouldn't become too disheartened. It's unlikely the crank is completely scrap just because of one damaged journal, since specialist machine shops can often reclaim them by re-cutting the journal and fitting an oversize bearing or even adding metal to the journal and re-machining.
But it's important to establish the cause of the failure in the first place. It's an unusual defect in a 997.
It's not the end of the world if a new crank is needed, but it's best to weigh up the most economic method of repair in the first instance and Hartech is a good source of specialist knowledge is such matters.
Regards,

Clive
 
It sounds like this garage don't know what they are talking about so don't take their diagnosis seriously.

Where in the country is your car so we can best direct you to a garage that does.
 
Well as a mechanic myself, I think it really depends on your discussion with the garage before they pulled apart your engine. It is totally normal practice to strip out an engine in order to be able to find out the amount of wear and damage that the crankshaft has suffered and these types of diagnostic work is not always reversible. After all why would anyone want the engine reassembled with damaged bearings and a journal. If the bearing has spun around in side the big end cap this could cause extensive journal damage and make the crank UN repairable. If you stopped running your engine as soon as you noticed the strange noises coming from it then you might get away with a crankshaft regrind. But if there are lots of metal contamination in the engine then you would be looking at a complete engine strip down, clean out and rebuild.
Either way not a cheap job and involves lots of man hours let along the required parts.......maybe time to start ringing around for s secondhand engine from an accident write off........
 
hi all, thanks for your help and comments, i have today attempted to sort out the boxes of bits i have been left, i agree that they had to strip it down to diagnose it but there are bits all over the place, i have found a couple of companies who can strip and rebuild my engine which i would prefer, but if it was me i woudl of wanted the engine whole so that i could take it apart methodically, not this mess, i am not sure if i should get a manual and just rebuild it in my own time, so at least i can hand it over, unless anyone knows of a retired expert or can get hold of an engine manual for me helpppppp, i will post some pics if anyone know how i can do this

chris

 
hi thanks for your help, do you know anyone who could add metal to it? ive heard mixed stories about this, thanks
 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Archant Dialogue
Back
Top