head bolts

[Suprarook]

There might be a thread on this somewhere, but I could not find it

I bought my 92 N/A about a month ago and I am wanting to tighten the head bolts on it just to be sure, there is nothing wrong with the motor or driveability (yet) and I need to know if removing the valve covers will gain access to the head bolts or what do I need to do in order to access them.
Also is there a specific torque spec on these bolts??

 

[BlackDynamite]

Yes you do need to remove the valve covers to access them and most people say you should torque them down between 65-80ish depending on who you talk to

PLus how many miles on the engine? IF a lot of miles i would say change the head gasket so you don't mess anything up in the future

 

[Suprarook]

well, don't rip on it because it drives strong and no issues, but it has 252,000 miles on the odometer and I have no information on the history of this car up until the point I bought it about a month ago.
It seems like a major undertaking to change the HG, I may wait if I can get away with it...

 

[trydrew]

Yes you do need to remove the valve covers to access them and most people say you should torque them down between 65-80ish depending on who you talk to

PLus how many miles on the engine? IF a lot of miles i would say change the head gasket so you don't mess anything up in the future

I believe the commonly recommended value is 72ft/lbs on stock head bolts.

 

[supramacist]

ARP says torque to 80 lbs. But ya it depends on who you talk to 75 is a nice number.

 

[Suprarook]

anyone have a visual of the head bolts and is there a certain tightening pattern?

 

[trydrew]

For the pattern:
http://cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=EM&Page=55

The stock head bolt will look like the thing in the middle of my attachment. Only difference is the valve train will be there, just look past it. Also, if you turn the engine to TDC it makes getting the socket in there much easier.

 

[supramacist]

Ask and ye shall recieve.

Blackberry pic.., work with me.

 

[thechori]

i think those are studs aren't they?

 

[trydrew]

Yes, SupraMacists' are studs.

 

[supramacist]

LOL, keep up chori.