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Hmmmm.. well the cam springing forward under the tension of the valve springs should not be strong enough to bend anything. Id honestly be surprised if you were able to bend a valve unless you were turning the cam sprocket with a long ratchet. It sounds more like the belt is a tooth or two off. Ive heard here about people being off a tooth and having similar problems but the knocking has me thinking its off more than one tooth. Id pop that timing cover off real quick and count the teeth on the belt between each sprocket dimple mark. The passenger cam sprocket dimple mark is around 11 o'clock and the driver cam sprocket dimple mark is around 1 o'clock, while the crank sprocket dimple mark is around 5 o'clock. Pop the belt on and keep it taut in the middle between the two cam sprockets and also keep it taut between the driver cam and the crank. The belt can be as loose as needed between the crank and passenger cam but it helps to have some tension in that area or the belt tries to jump off the passenger cam while you are trying to get the tooth count right. So with the belt on and the cam and crank sprocket dimple marks pretty close to the 11, 1, and 5 o'clock positions count the teeth (peaks) on the belt between the passenger cam sprocket dimple mark and the driver cam sprocket dimple mark. There should be 40 teeth (peaks). If you've got more (or less) than 40 teeth then move the driver cam just a little bit until you count 40 teeth between the two dimples. Then count the teeth between the driver cam sprocket dimple and the crank sprocket dimple. You should have 43 teeth. If you have more (or less) than 43 teeth then CAREFULLY and gently turn the crank the tiny amount you need to achieve 43 teeth. Once you have your tooth count 100% confirmed then set the tension and rotate the engine several times by hand before buttoning everything back up. I have tried using alignment marks on timing belts for my VG33 and have never been able to make everything line up perfectly. Its always a tooth or half a tooth off when comparing the marks on the sprockets to the marks on the rear timing cover. I found the tooth counting method and it has worked flawlessly 3 times on my QX4 (one 100k mile service, one engine swap, and one head gasket job). It has also worked on my wife's GX470 thats waaaaay scarier and legitimately harder to work on than my QX4. The stupid alignment marks and LH cam(which is actually right hand from where you work) RH cam(which is actually left hand from where you’re working) labeling is too confusing for me to confidently work around/with. I about lost my marbles trying to do my wife's timing belt and the #&$@ sprockets are labeled backwards. Like why couldn't they call them D(river)C(am) and P(assenger)C(am)??? /endrant

Well, didnt get to RAC last Sunday cause I ended up sick as a dog. Gonna shoot for this Saturday. Did get the CB in though, but I forgot to turn it off and in 3 days it killed the battery. Professional install pics inbound.

Thanks for the notice.....inspected the valves and 4 of 6 were loose. Sent from my LG-K425 using Tapatalk

While it's apart, check the power valve screws, if you haven't (if it's an automatic).

Having such a new R50 is awesome because you've got all the potential with none of the worries that all of the over 200K guys are having to think about. Gonna be an awesome build. Good luck man, I’ll make sure to keep checking back