02GF74
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| posted on 6/11/08 at 10:10 AM |
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comment on this head?
Do these valves look a bit too far recessed into the head? So will the increase in valve height affect the rocker geometry?
Anyone see any problems with that?
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owelly
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| posted on 6/11/08 at 10:18 AM |
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I would say it depends on how far off the original it was. If the rocker gear was designed to fit like that then it should be OK. If some geezer in
his shed has machined the head and then plonked any old rocker pedastals and shaft on it, it may be a problem.
http://www.ppcmag.co.uk
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nick205
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| posted on 6/11/08 at 10:19 AM |
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Difficult to see clearly, but I would expect to see the valve face more or less flush with the face of the cylinder head. No way of knowing from that
though whether it's been built with standard length valves and rocker components either.
Is it yours?
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Dangle_kt
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| posted on 6/11/08 at 10:44 AM |
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In addition its going to effect compression if they are higher than they should/need to be.
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mr henderson
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| posted on 6/11/08 at 10:45 AM |
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Well it certainly isn't going to help with the gas flow, if I'm seeing it correctly.
There's only so much valve lift available and it looks like a fair bit of it is going to be wasted there before there can be any useful gas
flow
John
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Mr Whippy
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| posted on 6/11/08 at 11:01 AM |
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looks wrong but depends if there is recesses in the pistons to clear the valves when the pistons up. Personally I don't like it but here's
another that looks very similar
I think with this kind of head you will need to be very careful if intending to fit a high lift cam, there may be little clearance between the piston
and valve and even a single tooth out on the belt would probably cause damage
[Edited on 6/11/08 by Mr Whippy]
 
Rescued attachment BRAND_NEW_CYLINDER_HEAD_WITH_CAMSHAFT_AND_VALVES_FOR_TOYOTA_2L_3L_5L_ENGINE.jpg
Fame is when your old car is plastered all over the internet
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DarrenW
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| posted on 6/11/08 at 11:02 AM |
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What is the measurement from the planed face to top of valves? Does anone else know what the same measurement is on a new OE head?
Do you know what the valve lift is?
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DarrenW
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| posted on 6/11/08 at 11:04 AM |
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The head in Whippy's pic look like the head has been chamfered around the valves.
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02GF74
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| posted on 6/11/08 at 11:34 AM |
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I don't mean to criticise this head and it may be the reflection that gives the appearance of vavles being further into the head than the ones I
have seen; those ones the valves stick out beyond the plane of the head.
just curious...
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Mr Whippy
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| posted on 6/11/08 at 01:21 PM |
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don't think its an issue, but engines vary so much it's hard to tell want is normal for this particular one
[Edited on 6/11/08 by Mr Whippy]
Fame is when your old car is plastered all over the internet
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MikeRJ
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| posted on 6/11/08 at 03:48 PM |
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It's very hard to tell from the photo to be honest, would need a much closer shot. However, the valves should not be flush with the head; if
they are the valve seats are significantly recessed. Besides possible valve train geometry issues, this will cost you dearly in terms of low lift
valve flow, which is a big chunk of the overall open time of the valve.
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MikeRJ
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| posted on 6/11/08 at 03:49 PM |
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quote:
Originally posted by DarrenW
The head in Whippy's pic look like the head has been chamfered around the valves.
It's the head off a indirect injection diesel engine, not a Ford Kent engine, so not really comparable.
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omega 24 v6
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| posted on 6/11/08 at 06:21 PM |
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quote:
It's the head off a indirect injection diesel engine, not a Ford Kent engine, so not really comparable.
Astra ??? Vauxhall
If it looks wrong it probably is wrong.
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MikeRJ
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| posted on 6/11/08 at 08:43 PM |
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quote:
Originally posted by omega 24 v6
quote:
It's the head off a indirect injection diesel engine, not a Ford Kent engine, so not really comparable.
Astra ??? Vauxhall
Toyota according to the website the picture came from.
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