As above, I'm looking to buy a spare to get fully worked, but I want to make sure there's plenty of meat left incase of future skims. What's the thinnest before it become scrap?

 

Going by the ford manual its 138.68mm

But plenty of people use them upto 138mm on modified engine with no issues

Findind a good cylinder head can be hard but there are out there, + loads of people think they are worth a fortune when in real terms they ain't,

I've seen some breakers commanding Ł600 upwards for a used head with usable deck height then add onto of that the cost of having it rebuilt, new guide, seals, ETC it becomes very costly

If you are really stuck i know of a 4x4 head with a deck height of 138.7mm that needs 1 valve and a set of guides and its in top condition no rot around the water ways

 

start at 139.15mm
fine down to 138.0mm (some say 138.4mm)
group A heads are 137.6mm and work fine.

 

Cheers chaps! I'm asking as there's one one ebay now advertised as 138.4, so I guess its virtually on its last skim anyway (as mine is!!)

Is this to raise compression? So potentially my head on the final skim could be done again with a good thick gasket and low-ish comp pistons and would be ok?

 

That was another question I had but didn't want to look a mong by not knowing!! A 4*4 head is ok on a 2 wd car?

How much for the head you know of?

 

yes it will fit, you'd need to block up the oil way in the head as the feed for turbo is different, and you'll need a complete head with camshafts as these are different also, and it will raise the comp to about 8.2:1, due to you using 2wd pistons and a 4x4 head


if you head is @138.4mm and is perfectly flat at that it will be fine to use just fit it with a Group A gasket and standard head bolts and you'll be fine

I've used a 138mm 4x4 head and ran it at 360bhp with no issues and i used the car real hard

 

What a load of shit you talk

" PEOPLE THINK THEY ARE WORTH A FORTUNE WHEN IN REAL TERMS THEY AINT "
How the hell can you say that ,,i remember you trying desperatly to get a good head and couldnt

I sell ( when i can find them ) good heads for between 500 and 600 and cant get them quick enough to meet the demand

I have had 2 good heads in the last 3 years ,,that shows how easy they are to find

 

so true,even well skimmed ones make Ł250 all day long,if i had one at 139mm now i would want Ł600 minimum.

 

so thats 2 out of 2 cosworth parts dealers than know what were talking about ,, lol

Im sure this bedroom trader will put is in our place Tim

 

what price do you put on a 4x4 measuring a straight 139 complete with complete with new bronze guides, iskys and followers out of interest, would it be about Ł600

 

all day long,just make sure its been measured acuratly as we are only talking 10ths of a mm to make a difference.

 

thanks

 

digital verniers ok to measure or do it have to be done professionally

 

why we're on the subject i have a full 4x4 saph coss engine 67k genuine with 139mm head thickness never been apart until i took it off to rebuild for my resto project so whats the engine worth complete ?

 

Digis are fine mate

 

defo Ł600

 

but not ideal.

 

LMFAO it you lot that put the stupid prices, there are some breakers i rang who wanted Ł700 for 80k heads that would be would need rebuild anyhow

And for your info i waited and got myself 2 mint 4x4 heads with no rot measuring 138.7mm and 138.65mm and both heads within 30 miles of my house and i had change from Ł300 from both of them.
I now have 1 stashed away for when i might need it next

yes i understand ya gotta make a living but when you account for the price of a rebuild on top of what you sell your 50k,60k,70k mile heads for, it makes it very expensive!

I look forward to the day when cosworth start re-casting them again cause the prices will come down to what they should be

 

168,7 and 168.65 ,,no wonder they were cheap , you must have used about 10 gaskets to stop the valves hitting

You can moan all you like about being expensive , i have over 2k of overheads to pay every month ,,not like you bedroom traders who pay nothing other than Ł20 a week to you mum to wash and feed you ,,lol

 

I have never had a problem with them ,,

 

and the 3rd proffesional RS breaker confirming good heads are like gold dust and make Ł500 to Ł600,so there you go
lets just look at what Mr Silky16V has stated lest split the difference at Ł550 for a really nice head
Ł100 for the cams
Ł10 each for the inlet vaves
Ł20 each for the exahust valves

thats Ł340 just for bare parts alone,makes the bare haead casting Ł210
now matey is that expensive ??????????
far far from it,unfortunatly its people like this who is driving down the value of Cosworths as if the spares are worth fuck all what do you think that does to the price of your pride and joy
think about for a while

 

LMFAO! This is exactly what i mean you lot trying to make out heads at that height are no good, please Paul stop trying to belittle people that actually also do know something about cosworths a head at 138.7mm is still just (according to ford) in its usable deck height so don't try make out that it worth scrap value only!

Even heads at less height have no issues!

Well i'm self employed, own my own house, parents i have very little contact with, must admit i do ok for myself thanks

 

A head at 138.7 is perfectly ok to use ,,thats not what you posted tho is it ??? i see you have edited your post ,, idiot

so you thin k you know everything about cosworths do you ,,lol,, that must be because your Chip the cosworth gods mate ehh

and for the record , the min ford say is 138.6 so why would i say 138.7 is scrap ??? are you trying to say i wouldnt want to sell anyone a head at 138.7 ,,that must mean you think im the most honest breaker in the world ,,,thanks

 

No No you lot keep at it i'm not knocking what you get for your heads if you can make a ŁŁŁ then so be it, but i know when i was looking and rang around i wasn't prepared to pay the (what i personally though, and many people i spoke too) price that breakers wanted i waited and rang about Pm'd & emailed some people and came up with two 4x4 heads for correct money.

What i find most amusing is how Paul trys to make out that useable deck height heads aren't worth anything, and in doing so trying to belittle my knowledge about them!

Now any1 who reads this thread will think that there 137>mm or less heads are worth fuck all and end up spending a fortune on a taller head when in actual fact theres is fine!!!!!

 

please show where i said 137 is scrap why would i say that as i said above i have only had a small amount of good heads in years , so im not exactly trying to make sales of items i cant get am i ,,,fool ,,

 

Hang-on a minute gobby mouth now where have i stated that i know it all i pointed out that your not the only 1 that knows abit about them.

Ya see ya at it again Paul trying to belittle the simply users on here, you would be the last person on this earth i would except advice from!

As for Chip i had cosworth before him and when he started out with his first he asked for my advice

well fuk me shoot me down for 0.08mm

 

LMFAO!!!!!!!!!!!!!!!!!!!!!!!!!!

please stop Paul i'm gonna bust i'm laughing that hard

 

So where is it where i said 137 is scrap ?????

and i think if you asked about on here you will find that there are a lot more people that would take advice from me than there are that wouldnt ,,,go on ask about mate

Bloody bedroom traders ,,lol,,

 

138.7 is a huge difference to 139.0mm though!!does not sound alot but it is in terms of long term investment in an engine/head.

as for 137.0mm,that really is scrap area,your well into the valve seats at that but with money and skill its ok for a N/A aplication,but at 137.0mm you have lost your squish area for combustion.

matt,you really hate traders dont you!!your always having a go at them,i would think pauls forgot more about cosworths than most folk claim to know in this land!!

i guess over the last 3 years ive maybe had 50 cylinder heads,thats a concervative figure,of which maybe two were at 139mm,one i distinctly remember was at 139.1 and i got Ł700 for it to a guy in finland.

as for you waiting for cosworth to recast heads,it will never ever happen,if in your wildest dreams it did do you know how much a knew one would cost?

 

well done Tim ,,i couldnt be arsed to write that lot ,lol,,

as you say , people do use heads below the " real usable limit " with thick gaskets and think its ok ,,then wonder why they drop a valve ,,lol,

I would never use one on a good engine below the 138.6 limit , altho i know plenty of people who have

And the reason people like Matt always have a go at traders is because the would realy love to be a real trader like us Tim , but know they havent got what it takes ,,Balls , and brains to do it ,,there happy selling shit to others and getting away with it by justifying the shit because its cheap ,,not like robbing bastard trader prices ,,lol,

 

quick pic of silky:

 

very well put Tim

 

ive had alot of mucking around to get a decent head to set about spending some dough on getting ported etc

i had a decent bare late 2wd head,had it skimmed,valve seats recut,pressure test sold it for Ł350 on ebay as not of decent height

sold the early 2wd head complete bar cams and lifters just last week on ebay again Ł350

and i had a good height 4x4 head complete bar cams with a burnt valve and needing new guides for Ł300

but then sold that head for the more or less double that without touching it

and now about to run my newly worked 2wd head

 

why would a highly skimmed head have a graeter chance of dropping a valve Paul?

 

nope not at all Tim you for 1 i have alot of respect for always have, i bought plenty of stuff off you never had any issues, but i sense you dislike me also

As for Paul well i'm not gonna go there, he's wronged me and a very good friend of mine in the past

If you say so Paul, i've never had a bad word to say about Tim or Pete!

Sometimes i wonder about you Paul i think lifes too short to hold grudges & lets forget about the past wrong doing, but you always manage to try a belittle me and try your uppermost to make me out to some sorta villian against the traders. Then i realise you'll never change and i have to start disliking you all over again!

Tim & Pete my views in the post weren't directed at you in anyway, i apologise if you think they were and i hope to continue doing business with in the future

 

the reason is that when they are over skimmed they cut into the valve seat area and therefor weaken it, so you increase the chance of the seat falling out thus dropping a valve and destroying the engine

 

Matt

You tried once to make it out that i ripped you of and you failed badly

if you have somthing to say , and your mate has somthing to say then go ahead and say it ,,dont leave it up to people to think im a bad fella ,,let them make there own minds up with the facts ,,but you wont because you tried and failed

So please say what you feel i have done to you that was wrong and lets see what the people on here think

Thats the reason i have a problem with you Matt , I sold you a car , you came you drove , you tested and were very very happy , you even sold the car on for a lot more than you paid me for it , your moan ( if i remember correctly ) was i prommised you a load of piccs and reciepts of the rebuild ) when in fact i never said anything of the sort , the bloke who built the car said this when i called him and asked him to come over so you could chat with him about the car rather than me as he was the one who built it , I gave you a massive file of paperwork with the car and that was that , i never new anything about the other stuff until you called me and asked me to ask my mate when he was going to send it , the fact that he couldnt find it wasnt my problem , but even tho it wasnt my fault i was very sorry about it and told you so

The first i knew you wernt happy was about 2 years later when for no reason on a post very much like this you suddenly posted that i was a wanker and i somhow ripped you off

so come on ,,tell the world why your not happy

I bet this doesnt go any further

 

Your exactly right this ain't gonna go any further on this Public forum

People can make there own minds up about ya, like i have

 

well if your happy for people to make there own minds up about me why put what you did ,,you obviously want people to suspect im a dodgy fooker

I have a good reputation Matt , Im not perfect by a long way , but i am fair and will try to help anyone who isnt happy .

I again am very sorry you feel i wronged you in any way and honestly would have done what i could to have made it right , but not knowing you were unhappy until your post aprox 2 years later made it impossible for me to do anything ,

Paul

 

Must admit i havent read the whole the thread - but why couldnt you use a head with less thickness than 137mm say - could u not just pocket the piston?

Cheers
Bob