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I supported Toymods
Location:
Ryde, NSW
Registered:
April 2004
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4K-C head gasket
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Wed, 30 June 2004 13:26
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any one done a 4K head gasket?
anything i should be aware of when doing it?
is the 4K an OHV (pushrod) or a OHC motor?
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Location:
Sydney
Registered:
November 2003
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Re: 4K-C head gasket
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Wed, 30 June 2004 21:10
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a 4k-C is a pushrod engine.
if u cant be bothered changing the head gasket ill buy the motor off u
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Thu, 01 July 2004 01:06
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yeah its easy as. pushrods out, manifolds off, rocker bolts out in order, head bolts out in order, head off. there are screwdriver recesses in the head so you can lever it off
use hylomar spray if you're using a monotorque gasket or similar, don't use anything if you're using a grahpite gasket
torque specs and order for the rockers and head bolts are in a gregories/haynes/factory manual, or i can post them tonight when i get home. set your tappets cold then warm up the engine and set them properly when hot
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 4K-C head gasket
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Thu, 01 July 2004 01:09
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i wouldn;t use hylomar with the ACL monotorque gaskets (BD950MT), they seem to seal very well as is.
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Thu, 01 July 2004 01:52
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i reckon with 60 ft-lb holding it down you could probably use a manilla folder and it would be fine as long as it had firing rings 
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Location:
adelaide
Registered:
April 2003
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Re: 4K-C head gasket
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Thu, 01 July 2004 03:56
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you could possibly even do it with the manifolds still attached to the head if you were really lazy!!
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Thu, 01 July 2004 04:39
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if your exhaust is flanged. if you have extractors welded to pipe and mufflers all the way thru (like i do) then off they come
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Location:
adelaide
Registered:
April 2003
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Re: 4K-C head gasket
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Thu, 01 July 2004 07:18
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i reckon if you got creative with the way you got the pushrods out you would still be able to do it with even your exhaust attached
im up for the challenge
maybe i should go out to the local u-pull-it with a camera and record the process!
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Thu, 01 July 2004 07:33
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the pushrods just come up out of their holes once you take the rocker gear off, that's not the problem, you see when you go to lift the head off the deck, the exhaust gives it about 15mm of upward movement before the pipe hits the floorpan and you can't go any further. so unless you jack the front up, remove the front subframe and lower the short motor down, still attached to the crossmember, it's not going to happen
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Location:
adelaide
Registered:
April 2003
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Re: 4K-C head gasket
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Thu, 01 July 2004 08:24
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15mm should be enough room to get the old gasket out and slide the new one in!
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I supported Toymods
Location:
Ryde, NSW
Registered:
April 2004
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Thu, 01 July 2004 09:34
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15mm haha none of that silly gasket scraping clean mounting face business 
you'll just need a torque wrench and a metric socket set dude. if you're an apprentice mechanic i'll assume you know to undo the rockers and head bolts so the head doesn't warp, clean and degrease the mounting faces and other such things. i'm not even a mechanic and i can do it so u should be right
head bolt order
F 8 6 1 3 9
10 4 2 5 7
F designates front of motor. do them up in three separate passes, first 29ft-lb then 37ft-lb then 45ft-lb. do the rockers up in some sort of similar order, basically start from the inside and work outwards. rocker torque is 15ft-lb
to set tappets, rotate crank to #1 to tdc on firing stroke (rotor switch should point towards spark plug 2), set tappets 1 2 3 and 5 (counting from the front). rotate 360 degrees and do tappets 8 7 6 and 4
cold clearances are 5 and 9 thou (inlet, exhaust). warm clearances are 8 and 12 (inlet, exhaust)
don't forget a manifold gasket
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Thu, 01 July 2004 09:39
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if i could give you one tip, it's don't be he-man with the manifold studs and bolts. the torque for them is something stupid and immesurable like 7 to 11ft-lb, i usually do them up fingertight with a socket extension, then give em say quarter more of a turn
hopefully you're used to a torque wrench and you can feel when you've done it tight enough. better not tight enough, if it leaks then you can always just re-silicon it and do it up some more
there's nothing worse than getting your head all done and stripping out the last manifold stud you do up. been there, done that, it sucks
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I supported Toymods
Location:
Ryde, NSW
Registered:
April 2004
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Re: 4K-C head gasket
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Thu, 01 July 2004 09:45
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i dont work well in imprerial measurements what is 5 & 9 thou and 8 & 12 thou in mm? the torques are fine coz my torque wrench is american. also i dont mean to be snobby or showy in anyway im probably just naieve but i work on modern prestige cars i have never done a head gasket and i've agreed to do this job for experience. by the sounds of this i may have to look into getting the haynes manual.
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Location:
adelaide
Registered:
April 2003
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Re: 4K-C head gasket
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Thu, 01 July 2004 09:55
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mate its dead easy
pull manifolds off
pull rocker cover off
undo the head studs
lift head & replace gasket
torque head down as above
put manifolds back on
easy 1 day job 
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Thu, 01 July 2004 10:06
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well there are 1000 thousandths of an inch in 25.4mm, so 25.4 divided 1000 times X gives you millimetres, X being how many thou you're setting at. i never work in metrics
(25.4 / 1000) * thou = mm
don't forget to drain the coolant (pull the bottom radiator hose off) before you start, as there's water in the head. firing order for the distributor leads is 1342
i cant think of anything else we've missed?
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I supported Toymods
Location:
Ryde, NSW
Registered:
April 2004
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Location:
Sydney
Registered:
November 2003
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Re: 4K-C head gasket
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Thu, 01 July 2004 14:30
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i wana rebuild one thats why, why start with one thats running ok and spend the extra $$$ for it then i can get a stuffed one for next to nothing?
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On Probation
Location:
North East NSW
Registered:
December 2002
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Re: 4K-C head gasket
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Mon, 05 July 2004 06:08
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how'd you go sam?
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I supported Toymods
Location:
Ryde, NSW
Registered:
April 2004
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Re: 4K-C head gasket
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Mon, 05 July 2004 10:15
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well hmm... im still trying to get hold of a haynes/gregory's manual once i have that then ill organise to have the car brought to my house.
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no doubt they will be considering the car has done 293000kms. any special tools required to do the job?