I pretty much can get a new Toyota head Gasket for free, its an MLS and others have done their builds with them, so Im sure it will hold up. However, does anyone know what the bore on the stock gasket is? I will be running a 89mm bore and am wondering if I could still run one - I know many car manufacturers sometimes run a gasket up to 1mm over the stock bore size, so just curious.

 

I know cometic recommends going .5mm over on head gaskets.. Never heard of going the other way

 

Yeah, its always recommended to run .5 mm over the bore size - however it appears no one makes 89.5 mm HG Im also wondering if the stock HG is actually 88.5 or 89mm - Which HG are you folks running 89mm bore using??

 

Sorry to ressurect this thread - but hey easier than making a new one So typically with most HG you want to go .5mm over bore size correct? Im going with 89mm bore/pistons. My question, is the Cometic for an 89mm bore, or is it an 89mm headgasket for an 88.5mm bore? Either way, those of you running 89mm bore, what hg are you usin??

 

I'm using the one that dozed sells on there site.

 

I use the one that came with to me from ERL with the block. i believe its 89mm cometic MLS and my engine is bored out to 89mm.

 

well havent quite done my build yet but i already bought a 89mm cometic gasket and i too am doing 89mm bore. Hope i didnt buy the HG too soon.

 

I used oem on both 88.5 and 89 blocks with 0 issues

 

you should go with the 90mm cometic.

http://www.raceeng.com/c-4038-gaskets.aspx