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Engine Specific Info and Questions => IDI Engine => Topic started by: MRTANGOMAN on February 14, 2010, 06:05:46 pm

Title: AAZ pre-cup cracks
Post by: MRTANGOMAN on February 14, 2010, 06:05:46 pm

I've started to strip the aaz head, and found some hairline cracks around the openings of the pre-cup..
still useable or do they need replacing ???

Title: Re: AAZ pre-cup cracks
Post by: NintendoKD on February 14, 2010, 06:16:44 pm

Unless you know of somewhere that you can get the precups you won't be able to replace them.  There is a thread on just this subject.  The rule of thumb, so to speak, as I'm told, is that if the cracks run halfway or more then they need replacing.  I am going to be running copious amounts of boost so I am replacing mine regardless.

Kevin

Title: Re: AAZ pre-cup cracks
Post by: Vincent Waldon on February 14, 2010, 06:26:27 pm

Are you able to post some pictures?

Title: Re: AAZ pre-cup cracks
Post by: Powered by Spearco on February 14, 2010, 07:58:14 pm

These are not AAZ's but 1.6TD one that also have hair line cracks. Take a look.

The one thats #3 has a sharped edge that bent down twards the piston.
The other has a crack about 1/8th inch long at the opening.

(http://i232.photobucket.com/albums/ee10/joshmarstall/GOPR0115.jpg).

(http://i232.photobucket.com/albums/ee10/joshmarstall/GOPR0114.jpg).

(http://i232.photobucket.com/albums/ee10/joshmarstall/GOPR0113.jpg).

(http://i232.photobucket.com/albums/ee10/joshmarstall/GOPR0112.jpg).


Ok. The pics don't really show  :-\.

Title: Re: AAZ pre-cup cracks
Post by: NintendoKD on February 14, 2010, 08:29:01 pm

webcams are great, that is a really clear pic, are you using an apple?

Title: Re: AAZ pre-cup cracks
Post by: Powered by Spearco on February 14, 2010, 08:31:07 pm

GoPro HD

Title: Re: AAZ pre-cup cracks
Post by: MRTANGOMAN on February 15, 2010, 12:42:41 am

May-be abit over-kill but you can only really see 'em clearly by eye
have taken some photo's but none show the cracks

engine build :-
k24 turbo + boost controller
1mm overbore
h section rods
balanced + lightened
engine girdle
2.5" down pipe and full system
pump mods (poss 10mm head,11mm if i can find one)

so running high boost and extra fuel = cracked pre-cup death ???

may well just get a new head in better condition

Title: Re: AAZ pre-cup cracks
Post by: Henchman on February 15, 2010, 06:14:59 am

That you got them out in one piece says alot!

Ian

Title: Re: AAZ pre-cup cracks
Post by: MRTANGOMAN on February 19, 2010, 03:51:02 pm

Bingo  ;D

found the VW part number on one of the forums (prob on here lol)

028 103 391m

they are still avi and only £11.50 each plus the tax, but should get some discount on that tho'

it'll save me buying a new head .....

cheers

Title: Re: AAZ pre-cup cracks
Post by: NintendoKD on February 19, 2010, 08:14:23 pm

where exactly?  I would just love to know.

Title: Re: AAZ pre-cup cracks
Post by: MRTANGOMAN on February 22, 2010, 01:08:59 pm

Quote from: NintendoKD on February 19, 2010, 08:14:23 pm

where exactly?  I would just love to know.

Just ordered 4 from work (u.k. VW commercial dealer) £12.00 each plus tax, but should get some discount  ;D

Title: Re: AAZ pre-cup cracks
Post by: NintendoKD on February 22, 2010, 05:56:05 pm

any chance you could vend some in my direction? ;D

Title: Re: AAZ pre-cup cracks
Post by: MRTANGOMAN on February 24, 2010, 07:11:11 am

Darn they've gone back order @ VW Europe  :'(

But  ;D delivery date 2nd march ..

i'll update the thread when i get 'em

Title: Re: AAZ pre-cup cracks
Post by: MRTANGOMAN on February 25, 2010, 02:26:41 pm

RESULT ;D
My pre cups have arrived today cost £56.40 inc v.a.t

i can get on with building my engine