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784 Posts Member #: 912 Post Whore North Yorkshire |
4th Jun, 2010 at 01:25:08am
Right gents I've just started a strip down and refresh of a head I had sat on the shelf. And found this small crack in the valve seat.
I drill holes in everything..! |
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 261 Posts Member #: 713 Senior Member Western Australia |
4th Jun, 2010 at 02:17:33am
As long as it's just the seat & not the head it'll be fine. Just get new seats put in. On 24th Dec, 2008 Nic said:
eyh? im drubj but very confused##]#IU |
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 2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
4th Jun, 2010 at 05:50:00pm
that isnt a hardened seat, crack is in the head.. turbo 16v k-series 11.9@118.9 :)
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 3184 Posts Member #: 628 Post Whore a LIL fishing village on the coast - Newcastle Upon Tyne |
4th Jun, 2010 at 06:13:57pm
as above, i have had issues with Longman heads doing this but only with dinner plate sized valves put in.......
On 17th Aug, 2009 Jay#2 said:
I doubt I'll be dipping into the 13's like you did though! |
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 465 Posts Member #: 1972 Senior Member Worcester |
4th Jun, 2010 at 06:30:50pm
I have used heads with cracks here before and have had no problems |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
4th Jun, 2010 at 07:26:59pm
I would NEVER use the head as it is, but if you take it to an experienced head modifyer, I guess he could tell you whether if it's scrap or not. If fitting a new seat removes the entire crack, then it'll be fine. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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 6966 Posts Member #: 507 Fastest A Series Mini in the World leeds/wakefield. |
4th Jun, 2010 at 07:48:31pm
On 4th Jun, 2010 Richie said:
as above, i have had issues with Longman heads doing this but only with dinner plate sized valves put in....... The problem with the very large inlet valve heads that Longman produced was that he would undercut the valve seat in the port between the two valves , so thin was the material, left that it would crack fairly quickly relatively speeking, Ian Jonson put a brand new Longman GT 17 on his Nitrous speedster and it cracked the valve seat in about 5 runs, lol. i did succesfully weld in up for him but he never ran that head on gas again , carl |
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 3756 Posts Member #: 1709 I like granny porn. LONDONSHIRE |
4th Jun, 2010 at 07:56:28pm
what would the symptom be for a crack head?? On 2nd Oct, 2009 Vegard said:
On 1st Oct, 2009 Jimster said:
I bet my first wank came quicker than your first mini turbo These new modern turbos with their quick spool up time, would make the competition harder. On 15th Aug, 2011 robert said:
phew!!! thank you brett for smashing in my back doors .( not something i imagined writing... EVER) |
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