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Author Subject: Head and Camshaft Question
Disco_Stu

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Location: County Durham

Registered: 09 Aug 2008

Posts: 243

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Post #1
I’ve just had the head dipped in a cleaning tank, however there seems to have been a problem and the cleaner has been more ‘aggressive’ than wanted (Doh!!)

In the photos below you can see that the casting where the camshaft sit now have a slightly rough surface.
I have also measured the gap between the cam journal and casting with Plastigauge and the gap varies between 0.050mm – 0.063mm

Question; have I #@*’ed my head? Or can it be used?



Close up:








Close up (you can see the part which was not removed (had some sealant on)


Close up


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Posted 8th Jun 2011 at 00:36
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,865

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Post #2
hmmm, the only solution I can think of would involve facing the head to cam ladder surfaces and line boring where the camshaft sits to restore the machined finish.

whether that's viable versus the cost of another head is debatable, given you can pick up a decent gti6 head for about £100 or so.

time to see the advice of an engine builder or remanufacturer I reckon Sad

only few I know of around here is South Wales pistons in cardiff, or JSE engineering in Pengam, just up the road from Ystrad Mynach.

dont know any over cwmbran way.

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Posted 8th Jun 2011 at 01:00
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

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Post #3
Its f*cked

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

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Posted 8th Jun 2011 at 16:10
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

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Post #4
I would get on to the guy who dipped it in the caustic soda tank and tell him he owes you for a repalacement head. Every machined surface is destroyed, even the threads are damaged. The head is scrap now, it's not possible to save it at all.

________________________________________

R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 8th Jun 2011 at 20:04
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gnrlee Forum Admin

Location: Leeds

Registered: 20 Aug 2005

Posts: 8,887

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Post #5
ohh dear!

won't be resorting to that method of cleaning Dry

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Posted 8th Jun 2011 at 19:37
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vandal.pr!

Junior User

Location: Zadar, Croatia

Registered: 18 May 2008

Posts: 63

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Post #6
daveyboy wrote:
Its f*cked


At least its cleaned... you can always display it in your living room LOL

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Posted 8th Jun 2011 at 19:42
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

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Post #7
Shock That looks like its been left in some sort of acid.... that'll never repair i'd be goin back and requesting compensation, u asked them to clean it not destroy it!

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Posted 8th Jun 2011 at 19:48
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gnrlee Forum Admin

Location: Leeds

Registered: 20 Aug 2005

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Post #8
vandal.pr! wrote:
daveyboy wrote:
Its f*cked


At least its cleaned... you can always display it in your living room LOL


Yeah that could look quite Top gear Esq as a coffie table! get some Blue lights on it! Wink

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Posted 8th Jun 2011 at 19:54
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

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Post #9
jeffers wrote:
Shock That looks like its been left in some sort of acid.... that'll never repair i'd be goin back and requesting compensation, u asked them to clean it not destroy it!


Thats what caustic soda is Roll eyes it cleans up cast iron beautifully, but if you put anything ally in there it has to be monitored regularly to make sure its not removing material. Once clean it then needs to be neutralised in water or an alkali solution.

________________________________________

R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 9th Jun 2011 at 00:43
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

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Post #10
daveyboy wrote:
jeffers wrote:
Shock That looks like its been left in some sort of acid.... that'll never repair i'd be goin back and requesting compensation, u asked them to clean it not destroy it!


Thats what caustic soda is Roll eyes it cleans up cast iron beatifully, but if you put anything ally in there it has to be monitored regualrly to make sure its not removing material. Once clean it then needs to be neutralised in water or an alkali solution.

I know that! s'pose i was statin the obvious... Blush

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Posted 8th Jun 2011 at 20:52
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Disco_Stu

Regular

Location: County Durham

Registered: 09 Aug 2008

Posts: 243

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Post #11
Thanks guys Sad

It was dipped in "Masco 245-dm Alkaline cleaner at 7% concentration and added 503-spray 1:20 ratio"
To be fair the person who dipped it is a friend who was doing me a favour where he works. with it being an alkaline cleaner they thought it would have been ok. I have had other steel (steel being the key word I think) parts dipped before and it does not even take off the paint, it just removes the grim. No idea what has happened this time.

al least it will look nice as a table stand - lol

Glad I have that spare engine now - phew!

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Posted 8th Jun 2011 at 23:29
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smegal

Seasoned Pro

Location: Leeds

Registered: 26 Dec 2005

Posts: 5,940

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Post #12
Aluminium is more reactive than steel so caustic soda (alkaline solutions) p*ss through it.

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Posted 9th Jun 2011 at 00:38
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Disco_Stu

Regular

Location: County Durham

Registered: 09 Aug 2008

Posts: 243

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Post #13
Quick question that I hope one of you might know the answer to... Is a M16 head the same as the Gti-6 head?

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Posted 16th Jun 2011 at 03:37
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Rich E Forum Admin

Location: Hertfordshire

Registered: 27 Apr 2005

Posts: 7,757

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Post #14
No, only the Xsara VTS has the same head as the GTi-6 / Rallye

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Rich
Posted 16th Jun 2011 at 03:55
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Disco_Stu

Regular

Location: County Durham

Registered: 09 Aug 2008

Posts: 243

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Post #15
Rich E wrote:
No, only the Xsara VTS has the same head as the GTi-6 / Rallye


Thanks for the quick answer Wink

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Posted 16th Jun 2011 at 03:56
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,865

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Post #16
and the Euro/South America only Phase 2 ZX 16v Smile

not that you'll find one over here LOL

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Bring on the Trumpets.

Posted 16th Jun 2011 at 13:20
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