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How To Torque Cylinder Head Bolts








How To Torque Cylinder Head Bolts

Some cylinder heads like this BMW M20 engine require you to torque down the head bolts first to a torque value and then to a degree value. In this case it’s 90 degree twice.

I show you a complete demo of how to do this correctly.

🚀 These are the tools I use:
Torque Angle Meter

CDI Torque Wrench

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41 Comentários

  1. I just use a paint pen and put a dot at the 12 o’clock position on the bolt head after I’ve torqued to the proper ft lb then when it calls for two steps to 90 I just go 3 o’clock with the dot and then 6 o’clock. Most of the time the engines I work on are still in the car so that makes it simpler without using fancy torque wrenches or dials.

  2. Typical BMW (Break My Wallet) they make a simple job of torquing down a head to a block into a complicated process.

  3. My man, whats the first fundamental rule to specs? Dry holes and bolts unless specified otherwise by manufacturer. I'm disappointed.

    All you doing with oiling head bolts is overtorquing the head bolts by altering the friction between the two thread surfaces. That obviously overstretches the bolts and going past the bolts elastic threshold. Deforming the bolts and remove the bolts ability to handle heat expansion 😞 thats why you had to keep on redoing it 🤦‍♂️

  4. I am always running in to the issue , once I've been torturing down my 20nm and then go to to 39nm i can go one more round through in the same sequence and torque 10 out of 18 head bolts easily another time down to 40. Basically I run the 40nm twice to control them, before I do my 90degree and 90degree. Is this ok?
    BTW. I thought the BMW heads are a bit more difficult to torque down. That was as easy as all the 1HZ diesel engines I did. The only difference is that they need 69NM +90 +90. You really have to becareful the way you do your 90degrees in order to get them turned in 1 decent go. No squeaking or stopping I between.

  5. Nice job, just a comment on angle degree torque, it doesn't have to be continous in rotation, but more important smooth and slow, this is stretching the bolt , most guages have a position marker for this reason so you know where you are as some heads are done with the engine in situ and 220 degree is difficult to achieve in one move.

  6. Bos I want to torque cylinder head bolts for Ford Everest WL engine and what is the torque for Ford Everest?

  7. wait wait wait, you added a non-compressible fluid on the head bolts (oil) that you will torque them into the engine block? I dont know about this specific engine, but the FSMs i have used to work on my engines makes a really big point into ensuring the bolt holes dont have any oil, AFT, or other non-compressible fluid in the bolt holes as it can crack the block as your really wrenching down on those fasteners. I have been working on aluminum blocks, so maybe that is build different and is not an issue but will all the force i put on those bad boys i didnt want to take any risk hahah

  8. Bro thanks for showing me your video I like more information to inform me that Ford Everest WL engine four cylinder, cylinder head bolts foot pounds or Newton meters and cam shaft cap mount bolts torque and valve clearance . Please answer my request?

  9. Why my Sr20det manual say torque to 39n 79n then loosen all bolt then 40n then 90 deg . What they mean by loosen all ?

  10. hope you doing well, wondering if I tighten the new spark plugs by any suckit or so, then brought the torque wrench to torque it at spec, is there any chance that the spark plugs has been overtighten? I mean, you already tighten it by let's say 5 ft-pound, then you applied 15 ft-pound, it's gonna 20, or is there any something has been misunderstood? pls explain in detail, thx

  11. Hmm just buy a Snap-on ATECH3FR250GB 1/2" Drive TechAngle Flex-Head Torque Wrench , it has angle torque, problem solved. ):

  12. Is Oiling the bolts mentioned in technical information? If not you overtorqued your fasteners by 30%

  13. the guy in the background is so expressive and comic, without even trying lol, he should have been an actor in a mute film hahaha, I love watching his face expressions, he reminds me of my cousin

  14. Sir Maninoy , yung sinasabi mo tungkol sa paghigpit nang headbolt ay alternate , malagmit ang ibig mong sabihin ay Crisscross Pattern ! 👍🏾👌

  15. When it says 90 degrees +90 degrees do you have to make a mark when you first applied the initial 90 degrees ?

  16. well sound good what you doing on appropriate torquing but i reading one thing is 30 bls Ft then 90 degree done and I am do not understand why it say one loosen full turn on the 2002 ford escape V6 3.0L, LH engine head 8 bolts seem bolts will getting lose damage the thread again? why should say 6 stages?

  17. Awesome video clear and simple….not like in other channels too much talking :). Thank you for sharing. By the way I have subscribed to your channel. Happy Motoring!

  18. Did you recheck the original first torque? As as you get too the outer head bolts the center ones usually loose torque.

  19. once you toque all the bolts down should you go back and make sure they all went to spec a second time before turning 90 degrees?

  20. We don't always get lucky to have a helper so the torque gauge needs to be used as intended. If folks think it takes a helper to hold the cable of the torque gauge while another person torques the bolt they may or will opt for just using an alternative of torque values. I myself dislike a flexible cable. It just looks like a raw invention that was never refined! I have one like the one you are using but I've just ordered the other one with a nice big dial and an L-wrench that is used as a brace which I think I will find much more stable than a cable………. Hahahaha, I just made a rhyme LOL!!!!!Also, you can use longer or shorter allen wrenches as stoppers or even make your own holder out of heavy copper wire, etc!! It's a win-win!!!!! Also, I know for a fact and it's obvious that at the end of that 90 degree twist, there's a torque value unknown at the moment unless you were staring at a torque wrench that had a 'pointer dial'. I guess to find that value, you would have to use a torque wrench with a pointer and after you reach your 90 degrees, look at the torque wrench and convert as an option. Why wouldn't that work?? I love using 'clickers'!! After reaching 22 ft. lbs. you have the option of , let's say, going to 90 degrees OR 44 ft. lbs. then another 90 degrees or finishing with 70 ft. lbs.

  21. I don't have a BMW (I have a Renault), but I like this video. You have such a nice presence, here's a subscribe.

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