head gasket difference? - Aussie V8 | Holden - Ford

matts355 · 26-10-2008, 04:38 PM

hey guys,
when putting a 202 black/blue head on a red block you have to drill out and block off water passage holes right? well when it comes to the head gasket are they all the same for 202's?or you would have to use black/blue head gasket. .? im using a black 12port head on a 186 block.when i told my mechanic about the water holes he reckons theyre all the same red through to black.but ive been told by many people they arent.and im pretty sure they are not.
thinking it might have something to do with my overheating prob.just put in a triple core aluminium radiator.and its still running very hot.put a 14" thermo on aswell.still running 190-200degrees.i know it will run a little hot due to just being rebuilt and worked pretty hard but it still should not be running THAT hot

skidmarx · 26-10-2008, 10:40 PM

has it got a thermostat in it? if not thats probly the problem

GASSD6 · 26-10-2008, 11:56 PM

head gasket on the wrong way its so easy to do iv done it (lol) mine ran hot as that, iv got a blue 3.3 block with a red head and im using a red copper gasket.. on the right way this time of course. i didnt drill or plug any holes and iv got a 3 core radiator with twin 10in thermos and it hardly reaches 100degs.. the gaskets are different for sure

matts355 · 27-10-2008, 03:43 PM

went to a cylinder head shop today and the bloke said same thing.but very sure it is around the right way because we had the head off and on about 3 times before putting engine in car.and was all checked.
it is a black 202head on a 186 block..
had a look today when i put new thermostat in,and the flat bit where you can see a bit of the head gasket.toward front of engine,fuel pump side..just to the backand below of some bracket mount on the head.you can see a small hole bout 6-7mm round in the gasket...meant to be there or just confirming my suspicions about the gasket either wrong all together or wrong way around

GASSD6 · 27-10-2008, 10:21 PM

its on the wrong way mate hole goes to the back, the two water port holes will be blocked at the back of the head thats why she is heating up so bad.. i hope it helps cheers ( i have done it )

matts355 · 28-10-2008, 12:40 PM

thanks mate,
i will need a new gasket aswell for when i take the head off n put it back on?or the one on there be right..it is a racing series one.hardly 40k's on the engine..

GASSD6 · 29-10-2008, 04:56 PM

try it, but spray it with hylomar or some sort of sealer

26-10-2008, 04:38 PM	#1 (permalink)
matts355 casual poster Trade Rating: (0) Join Date: Mar 2005 Location: sydney western suburbs Ride: 65' HD Premier,98' trayback Rodeo Posts: 127	head gasket difference? hey guys, when putting a 202 black/blue head on a red block you have to drill out and block off water passage holes right? well when it comes to the head gasket are they all the same for 202's?or you would have to use black/blue head gasket. .? im using a black 12port head on a 186 block.when i told my mechanic about the water holes he reckons theyre all the same red through to black.but ive been told by many people they arent.and im pretty sure they are not. thinking it might have something to do with my overheating prob.just put in a triple core aluminium radiator.and its still running very hot.put a 14" thermo on aswell.still running 190-200degrees.i know it will run a little hot due to just being rebuilt and worked pretty hard but it still should not be running THAT hot Last edited by matts355; 26-10-2008 at 06:26 PM.

26-10-2008, 10:40 PM	#2 (permalink)
skidmarx resident tyre fitter Trade Rating: (1) Join Date: Jul 2004 Location: mackay Ride: vk commodore Posts: 904	has it got a thermostat in it? if not thats probly the problem __________________ 100% pimp factor, long live the VK

27-10-2008, 03:43 PM	#4 (permalink)
matts355 casual poster Trade Rating: (0) Join Date: Mar 2005 Location: sydney western suburbs Ride: 65' HD Premier,98' trayback Rodeo Posts: 127	went to a cylinder head shop today and the bloke said same thing.but very sure it is around the right way because we had the head off and on about 3 times before putting engine in car.and was all checked. it is a black 202head on a 186 block.. had a look today when i put new thermostat in,and the flat bit where you can see a bit of the head gasket.toward front of engine,fuel pump side..just to the backand below of some bracket mount on the head.you can see a small hole bout 6-7mm round in the gasket...meant to be there or just confirming my suspicions about the gasket either wrong all together or wrong way around Last edited by matts355; 27-10-2008 at 04:58 PM.

27-10-2008, 10:21 PM	#5 (permalink)
GASSD6 casual poster Trade Rating: (0) Join Date: Sep 2007 Location: m'ton pen vic Ride: Lc Torana Posts: 50	its on the wrong way mate hole goes to the back, the two water port holes will be blocked at the back of the head thats why she is heating up so bad.. i hope it helps cheers ( i have done it ) Last edited by GASSD6; 27-10-2008 at 10:26 PM.

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26-10-2008, 11:56 PM	#3 (permalink)
GASSD6 casual poster Trade Rating: (0) Join Date: Sep 2007 Location: m'ton pen vic Ride: Lc Torana Posts: 50	head gasket on the wrong way its so easy to do iv done it (lol) mine ran hot as that, iv got a blue 3.3 block with a red head and im using a red copper gasket.. on the right way this time of course. i didnt drill or plug any holes and iv got a 3 core radiator with twin 10in thermos and it hardly reaches 100degs.. the gaskets are different for sure

28-10-2008, 12:40 PM	#6 (permalink)
matts355 casual poster Trade Rating: (0) Join Date: Mar 2005 Location: sydney western suburbs Ride: 65' HD Premier,98' trayback Rodeo Posts: 127	thanks mate, i will need a new gasket aswell for when i take the head off n put it back on?or the one on there be right..it is a racing series one.hardly 40k's on the engine..

29-10-2008, 04:56 PM	#7 (permalink)
GASSD6 casual poster Trade Rating: (0) Join Date: Sep 2007 Location: m'ton pen vic Ride: Lc Torana Posts: 50	try it, but spray it with hylomar or some sort of sealer

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