How to torque cylinder head bolts, BMW M20?
How to torque cylinder head bolts, BMW M20?
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. If you purchase from this link, you will pay exactly the same, and my channel will make a small commission.
What’s the best way to install a cylinder head?
Grab one of the old M8 bolts too. Thoroughly clean the deck surface of the block and the head with a clean rag and cleaner like acetone. Put the head gasket on the block, ensuring that any markings for “front” or “this side up” are in the correct place – i.e. at the front and/or you can read it.
What should the torque be on a torque table?
Torque specifications are shown either as an exact figure, or a specific range. Follow any special instructions or multi-step directions carefully to assure correct final torque. There may be different specifications for different size bolts, bolts in different positions, tightening bolts in several stages, or a cold engine vs. a warm engine.
Where can I find the latest torque specs?
Find the most up-to-date torque spec listings in electronic format. FelPro-Only.com is your convenient source for advanced sealing information. It’s the place to learn and share “tricks of the trade,” find proper diagnosis and installation instructions, and enjoy easy access to parts reference.
What should the torque be on a cylinder head bolt?
The manufacturer usually stipulates that you must tighten the bolts in incremental steps. For example, suppose the final torque on a bolt is 40 foot-lbs. The manufacturer may state to bring all the bolts to 10 foot-lbs. first, following the torque sequence. In the second step, bring the torque to 20 foot-lbs.
What’s the best way to tighten cylinder heads?
The overall goal is to spread the torque evenly as you are tightening the bolts. Usually, you start at one bolt, and you work your way around in a circular pattern. Doing so ensures that your head won’t be warped during the tightening sequence. The manufacturer usually stipulates that you must tighten the bolts in incremental steps.
Do you need a good torque wrench for an internal combustion engine?
One essential tool you must have is a good quality torque wrench. Without one, you are like a ship without a compass at sea. Internal combustion engines run the gamut from small handheld model airplane units to large ship engines. For head bolts, no “one size fits all” approach to the torque specifications applies.
Torque specifications are shown either as an exact figure, or a specific range. Follow any special instructions or multi-step directions carefully to assure correct final torque. There may be different specifications for different size bolts, bolts in different positions, tightening bolts in several stages, or a cold engine vs. a warm engine.
