Timeline for Choosing the best timing marks
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 22, 2022 at 19:48 | comment | added | LFY MP7.3 | You can stop an engine at ANY point, lock both cams and crankshaft at that point and then remove the belt or chain and reinstall the belt or chain without affecting engine timing. So, when this is possible, why don't we choose a position in which cams are stationary as an extra safety measure? | |
| Jan 22, 2022 at 19:40 | comment | added | LFY MP7.3 | @Paulster2 - You're right but maybe I have problem communicating what I mean. The fact that in some cars, cams stay put even without locking pins is like a good SAFETY MEASURE because if a mechanic removes a pin by mistake, cams don't rotate and there is no risk of valves hitting the pistons. I think this subject is important enough to be considered by engineers. In some cars, this phenomenon happens by chance because timing holes are exatly in a position where forces are equalized but this is not the case in other cars. This has nothing to do with how timing affects low or high RPM torque. | |
| Jan 22, 2022 at 17:42 | comment | added | blacksmith37 | Reminds me of when I was a boy and had a mechanical cable to my Mallory dual distributer and could adjust timing as I drove. | |
| Jan 22, 2022 at 16:42 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | @NarimanAsgharian - If you are aware of everything I've stated here, then you'd understand what you're asking is not a concern for the engineers. Also, if you review the first sentence I typed in the answer, it says the same. | |
| Jan 22, 2022 at 16:01 | comment | added | LFY MP7.3 | @Paulster2 - Thanks for your fast and first response! I'm completely aware of the things you mentioned in your 2nd paragragh. With this topic, I just wanted to know if " holding the cams stationary without inserting locking pins with the belt/chain removed " is one of the things engineers have in mind when they decide where to design the timing holes in the cylinder head (not the engine timing, cam profiles, valve lift, etc). In fact, you can put timing holes in a cylinder head at any point (throughout 360-degree rotation of camshafts) you want without affecting engine timing. | |
| Jan 22, 2022 at 15:47 | history | answered | Pᴀᴜʟsᴛᴇʀ2♦ | CC BY-SA 4.0 |