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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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08-27-2021, 09:32 AM | #1 |
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Retorqing the head bolts.
* EDIT for people searching in the future *
Depending on the manufacturer of head gasket you do not need to retorque head bolts. TYPICALLY multilayer METAL head gaskets do not need to be retorqued. Almost all head gaskets for the FA20 worth getting are muti-layer metal and don't need to be retorqued. Last edited by irax; 08-30-2021 at 03:44 PM. |
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08-28-2021, 01:08 AM | #2 | |
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The head studs are 12 point 14mm torque to yield (TTY) bolts. Some say it isn’t good to re-torque TTY bolts multiple times, while others say it is fine. Just saying.
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08-28-2021, 02:01 AM | #3 |
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So, to retorque the heads I need to remove the timing cover, the timing tensioners, the timing chains, the the cam girdle carrier with cam and retainers as one piece, retorque the heads, re assemble, re set the timing? I just want to make sure there is no other way around it.
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08-28-2021, 02:55 AM | #4 | |
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08-28-2021, 03:35 PM | #6 | |
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Back in the day, when rebuilding an engine, we used to torque the head bolts down "on the way out" of the rebuild. NOT after the job was done - Yep, torque the head bolts down, adjust the valves, replace the valve cover then crank that puppy up - |
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08-28-2021, 04:02 PM | #7 | |
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The Following User Says Thank You to Irace86.2.0 For This Useful Post: | humfrz (08-28-2021) |
08-28-2021, 04:08 PM | #8 |
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08-28-2021, 04:15 PM | #9 |
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08-28-2021, 05:16 PM | #10 |
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Am I reading this correctly? I have never heard of anybody re torquing subbie heads after a rebuild. Can you even access to the bolts with engine in the car? Not to mention, to get the cams out, you would have to take apart the timing cover, then retime the engine and reset the lash of all 16 valves.
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08-28-2021, 07:14 PM | #11 | |
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Maybe follow this, but I could have sworn I saw something where someone removed the cams or something without pulling off the timing cover. https://www.ft86club.com/forums/showthread.php?t=103339
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08-28-2021, 08:03 PM | #12 | |
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08-29-2021, 09:38 AM | #13 | |
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Definitely, wait for word from maker of the head gaskets before proceeding. |
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08-29-2021, 04:24 PM | #14 | |
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