Jon(m600)

Need to get a new headgasket on my car but my head could be warped aswell could i just get it skimmed or do i have to get a new one so not to fook about with my compression ratio(its low comp)

TIFF

Depends if it has been skimmed before?

RANJ

get the head height measured and see if its within toloerances

brad

i doubt skimming the head will make much difference tbh . unless it looks like a banana then throw it away

abdr500

iTrader: (1)

get it skimed take it to a machen shop tell him its turbo head and he will tell if its a no go head

Jon(m600)

So once the heads off if i measure it i can tell if its been skimmed, But i always thought compression ratio was criticle or dont skimming make much difference?

simonc

You can always use the thicker metal comectic headgasket (as long as your block isn't wire rung) to drop the compression but i would get someone who knows what their doing to measure the head & the compressed thickness of the cometic gasket to work out the comp ratio.

Simon.

Jon(m600)

Cheers simon but my cars got a coopers ring gasket

Kev H

If your engine's low comp anyway it wont really matter that the CR may heighten a bit.

GARETH T

i wouldnt skim the head unless it needs it though

Jon(m600)

Result the reason i think ive got a problem with the head is graham goode think that coopers rings are decent, and my car had a new gasket last year so they think my heads gone soft or was it that im soft in the head

CozzyBrom

your head was fine mate trust me
its the shite rings that collins fitted
bite the bullet and get block sorted 1st there load of meat on the head as i rember

Kevin Sharp

iTrader: (3)

off topic....brom seen your sig.... have you not had your leg over for 6 weeks?

CozzyBrom

no mate a bit of a joke with the zoo boys quoted of trainspotting

Kevin Sharp

iTrader: (3)

ah right that classic THE FUCKIN VIDEO SHOP TOMMY

sorry back on topic now

CozzyBrom

go look at wallydaddy sig aswell it might make you laff

Kevin Sharp

iTrader: (3)

just looked ahh the scottish accent

CozzyBrom

Jon(m600)

Now then Brom when you say gat my block sorted what you mean

Rs Gus

iTrader: (2)

have the coopers rings grooves removed m8 or buy a new block

NICK K

Ill get ypur head off tomorrow jon c what has gone wrong (off your car i mean)!
I will also cheak head c if its like a nana!
Any one one here know what the max is for skimming ?
I was told once aslong as the surface is no lower than the end of the exhanst stud?
That sounds a bit of a rough guide to i would rather cheak it properly.

If to much is skimmed off is there a chance of valves toutching pistons?

Suppose thats a daft question it has Big valve cut outs in pistons

Stu @ M Developments

iTrader: (12)

138.68mm is the allowable depth.

Bear in mind that really big power motors should really just throw the head away if badly bowed and use a new one for fear of snapping camshafts in half and smashing your expensive internals up.

Jon(m600)

Cheers stu Head is now off gonna send the head,cams,ect away to be checked over by the pros just dont know who need to find out what cams its got because the numbers on the ends dont make no sense its also got solid lifters any ideas stu

Stu @ M Developments

iTrader: (12)

None without more info than:

Jon(m600)

Apparently there piper cams, but they dont say bd14 or bd15 theyve just got 3 or 4 numbers on the end so it looks like whoever does my head may have to send them back to piper to find out