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Checking condition of a second hand head?

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Old 03-05-2007, 11:27 AM
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Stavros
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Default Checking condition of a second hand head?

Can you?

On the face of it it looks tidy, but is it possible to check if its gonna be a smokey work out shitbox without totally dismantling it?
Old 03-05-2007, 11:32 AM
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garyrs
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not rlly sure , but i do no unless i was payin 100 quid or less , i would want a pro to inspect it for cracks , and thickness, gary
Old 03-05-2007, 11:35 AM
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its off an engine thats never been apart and in decent nick, so im pretty sure nothing as bad as that will be the case, but still worried something like valve stems are worn and it will smoke like a fookin train
Old 03-05-2007, 11:38 AM
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frog
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Default Re: Checking condition of a second hand head?

Originally Posted by Stavros
Can you?

On the face of it it looks tidy, but is it possible to check if its gonna be a smokey work out shitbox without totally dismantling it?
Pretty sure it can be leak tested by someone with the right equipment, and, checked for cracks with a special fluid, again, it looks like a specialist job.

For the leak check, I suspect at least the cams would have to come out (thinking cossie head here) to make sure all the valves are closed, unless the test can be performed one combustion chamber at a time.

I'd ring around engineering companies and ask for quotes for the work to be carried out, then check with the seller if they're happy for it to be carried out.
Old 03-05-2007, 11:43 AM
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alistairolsen
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if its on the engine, compression/leakdown test and a close look is all you can do.

off the engine, check thickness with manual, have a close look at cam bearings etc. I wouldnt give a flying fuck about the stem seals, theyre about 50p to change lol, but things like guides are a hard one to call
Old 03-05-2007, 11:44 AM
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Kevin B
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Purely my own opinion based on personal experience, but you might want to get it hardness checked as well as crack tested. If it has ever been cooked up it might have made it go soft.
Old 03-05-2007, 11:45 AM
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Stavros
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Originally Posted by alistairolsen
I wouldnt give a flying fuck about the stem seals, theyre about 50p to change lol
are they? lol, i know fuck all about taking heads apart, but thats good news

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Old 03-05-2007, 11:46 AM
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You are not going to be able to test the stem seals any way easier than pulling the head apart or fitting it to a car IMHO
Old 03-05-2007, 11:48 AM
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GARETH T
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when its off the car,, its worth changing the stem seals and checking the clearances of the guilds
Old 03-05-2007, 12:00 PM
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Chip
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Stavros, doing a basic rebuild on a head is properly easy, Cally was able to do that at 16, its a purely mechanical task really.

Only pissing annoying job is the collets if its a 16 head normally.
Old 03-05-2007, 01:15 PM
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Any special tools needed? Properly easy, but ive no idea

8valve BTW, not even overhead cam, pushrod
Old 03-05-2007, 01:20 PM
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Fudgey
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i got a valve spring compressor you can borrow, and the stick and paste for lapping in valves etc

if you want, i can strip it for you, you get it checked, and ill put it back together
Old 03-05-2007, 01:24 PM
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Originally Posted by Dan@FastFord
i got a valve spring compressor you can borrow, and the stick and paste for lapping in valves etc

if you want, i can strip it for you, you get it checked, and ill put it back together
Dunno if i trust you

But yeah, sounds a plan, well, ill help or summat, actually, you can help me with it all, its the law.

Cheers mate

PS- why are we talking on here, you sit about 15feet from me
This is as bad as YUM and Helen tag team posting when they at home together
Old 03-05-2007, 01:24 PM
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As dan says, only special tool you need is a 20 quid spring compressor.

If you bring the head down with you on sunday and some new stem seals, I will do it for you while Stu is doing your diff

Bring dans compressor if he has it handy as it will save my having to go over to my old mans place to fetch mine as thats where it is currently I think.
Old 03-05-2007, 01:37 PM
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Fudgey
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i cant be arsed to get up

let us know if you want me to bring it in tomoz
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