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Author Valve colouring in a cylinder head
Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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5th Oct 07 at 00:09   View Garage View User's Profile U2U Member Reply With Quote

What does this picture tell you about how the engine was running?



I know the second cylinder was oily, but what about the white on the exhaust valves on the other 3, what does that mean?
Dave A
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5th Oct 07 at 07:53   View User's Profile U2U Member Reply With Quote

clean burning engine, possibly a little lean. have also seen engines that have similar colouring on the valves that have been burning some types of coolant.
ad-sport
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5th Oct 07 at 17:33   View User's Profile U2U Member Reply With Quote

it would probably wash the whole area tho if it was coolant wouldnt it? i think they look ok realy, why was the head removed?
Superlite Ltd.
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5th Oct 07 at 18:20   View User's Profile U2U Member Reply With Quote

lean imo

what do the plugs look like?

[Edited on 05-10-2007 by Superlite Ltd.]
phil_sutton
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5th Oct 07 at 18:26   View User's Profile U2U Member Reply With Quote

second one is burning oil I would say, rest look fairly normal. Also what did the head gasket look like, had it gone anyway?
ad-sport
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5th Oct 07 at 18:28   View User's Profile U2U Member Reply With Quote

head gasket will be buggered now mate
Robin
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5th Oct 07 at 18:40   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Superlite Ltd.
lean imo

what do the plugs look like?

[Edited on 05-10-2007 by Superlite Ltd.]


No idea, I haven't got them
Robin
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5th Oct 07 at 18:41   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by ad-sport
it would probably wash the whole area tho if it was coolant wouldnt it? i think they look ok realy, why was the head removed?


for the same reason the sump, cams, crank and pistons were
Robin
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5th Oct 07 at 18:42   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by phil_sutton
second one is burning oil I would say, rest look fairly normal. Also what did the head gasket look like, had it gone anyway?


Robin
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5th Oct 07 at 18:44   View Garage View User's Profile U2U Member Reply With Quote

I'm not too fussed BTW, the engine will be having a full rebuild, as will the head, so it won't be burning oil anymore.

I was just wondering if white was normal as it seemed a bit odd to me having 2 white and 2 black in each cylinder, but then it's only the second engine I've had in bits which wasn't already cleaned, so I don't know
Richardhhha
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Registered: 29th Sep 07
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5th Oct 07 at 19:46   View User's Profile U2U Member Reply With Quote

your always looking to have a slightly off tan colour to the lavles and plugs for a clean burning engine, cyl 1 was a bit lean but 4 is what you want to see accross the boared.

whilst the heads off why dont you go get it ported?
Robin
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5th Oct 07 at 19:58   View Garage View User's Profile U2U Member Reply With Quote

According to my sources (PPC magazine and edition38 forum) the VW KR head is a really good design already, so doesn't need porting, people have done it before and it's basically been a waste of money.
joey736
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Registered: 11th Mar 07
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6th Oct 07 at 10:04   View User's Profile U2U Member Reply With Quote

pics of mine:





im glad to hear this is a healthy sign
Superlite Ltd.
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6th Oct 07 at 10:14   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Robin
According to my sources (PPC magazine and edition38 forum) the VW KR head is a really good design already, so doesn't need porting, people have done it before and it's basically been a waste of money.


opposite to the AGG where head work and cams is the first thing to do
Robin
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6th Oct 07 at 18:36   View Garage View User's Profile U2U Member Reply With Quote

The cam profile in the KR is pretty good too

People use them in ABF/9a engines as a cheap 'sports' cam

 
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