Dialynx or Audi

randall977 · 07-02-08, 04:58 PM

My Audi exhaust manifold has been welded where it cracked in 3 places, I've had some other work done to it as well so have ended up spending £130 on it. It's ready to go back on but I'm nervous about the welds and am thinking it might be better to get a Dialynx as it would be very annoying if the Audi one cracked after putting my engine back together. It's a common topic I know but what are peoples opinions???

Gordon WR · 07-02-08, 05:13 PM

Mine are well known. I bought my wr quattro with a Dailynx manifold in place, which lasted for 30k miles before it had warped and pulled the bolts out of the head.So the head and manifold had to be replaced with Audi parts which I expect to last for at least 90k miles.
I have heard that a decent repair is able to hold up well but have no first hand experience on that, but I certainly wouldn't go down the Dailynx route from experience.

Puglife · 07-02-08, 05:14 PM

dialynx are known for warping and cracking i believe... more info on quattroforum as people have had very different outcomes from a dialynx manifold.

randall977 · 07-02-08, 06:14 PM

5T-Headworks.jpg

volcano rs · 07-02-08, 06:24 PM

you have to weld the cast manifold in a special way .like heating it up first or the weld won't be proper .i had dialynx one on my car and it was ok no problems at all .

Puglife · 07-02-08, 06:34 PM

With cast welding you need enough heat in the surrounding area for the weld pool to fuse properly... I've not had a stab at fixing my manifold yet but i'm considering taking it into the university mechanisation labs to test out.

volcano rs · 07-02-08, 07:16 PM

Quote:

Originally Posted by Puglife

With cast welding you need enough heat in the surrounding area for the weld pool to fuse properly... I've not had a stab at fixing my manifold yet but i'm considering taking it into the university mechanisation labs to test out.

good idea to find out why they crack .

4v6 · 07-02-08, 07:28 PM

Might make mine from 321 or inconel..... that wont crack..lol

07-02-08, 05:14 PM	#3
Puglife ==>PUGSPORT!<== Classic Audi Club Member Join Date: Jan 2008 Location: Leyland Posts: 1,544	dialynx are known for warping and cracking i believe... more info on quattroforum as people have had very different outcomes from a dialynx manifold. __________________ 1986 UR Quattro - (1982) Lombard RAC Group 4 recreation - #24 H.Demuth/J.Daniels 1981 VW mk1 golf GTi - now 5cylinder and RWD.

07-02-08, 06:34 PM	#6
Puglife ==>PUGSPORT!<== Classic Audi Club Member Join Date: Jan 2008 Location: Leyland Posts: 1,544	With cast welding you need enough heat in the surrounding area for the weld pool to fuse properly... I've not had a stab at fixing my manifold yet but i'm considering taking it into the university mechanisation labs to test out. __________________ 1986 UR Quattro - (1982) Lombard RAC Group 4 recreation - #24 H.Demuth/J.Daniels 1981 VW mk1 golf GTi - now 5cylinder and RWD.

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07-02-08, 05:13 PM	#2
Gordon WR Grown up member Classic Audi Club Member Join Date: Jul 2007 Location: Chester Posts: 781	Mine are well known. I bought my wr quattro with a Dailynx manifold in place, which lasted for 30k miles before it had warped and pulled the bolts out of the head.So the head and manifold had to be replaced with Audi parts which I expect to last for at least 90k miles. I have heard that a decent repair is able to hold up well but have no first hand experience on that, but I certainly wouldn't go down the Dailynx route from experience.

07-02-08, 06:14 PM	#4
randall977 Mr Typ 43! Classic Audi Club Member Join Date: Sep 2007 Location: Oxfordshire Posts: 838	5T-Headworks.jpg

07-02-08, 06:24 PM	#5
volcano rs Grown up member Join Date: Jul 2007 Posts: 132	you have to weld the cast manifold in a special way .like heating it up first or the weld won't be proper .i had dialynx one on my car and it was ok no problems at all .

07-02-08, 07:28 PM	#8
4v6 Ex Member Classic Audi Club Member Join Date: Dec 2007 Posts: 5,565	Might make mine from 321 or inconel..... that wont crack..lol