Thanks for such a comprehensive, hugely fascinating & entertaining series Dave. You've certainly given me a greater knowledge of engine theory & dynamics - which will (hopefully) lead to better practical application & practice. Bravo Sir!
Is it normal for the number three cylinder exhaust lobes ride on top of the rocker arms before placing the caps? the cam. #3 exhaust. Cam Teeter totter's. The weirdest part is that the chain matches up (I marked them with color dots like you said) with the gears on the cam. As well as on the crank gears. It should all be fine. But yet everything lines up everywhere else. Intake cam is flat and seated in the motor. Cam gear marks line up.; such as the exhaust gear lines up with head. The crank- two markings line up. It’s the exhaust cam that doesn’t seat into the motor it Tedder totters at #3 lobes.
One cylinder will always be on cam when fitting the cams, as there's never a point that all valves are closed in a conventional il4 engine. Assuming that's what you mean. If its not, you can email some photo's to me via the website
Hello, Hope you are fine and doing great. I watched the whole Engine Refresh series on this Engine Which has been really helpful! everything explained perfectly :) Though currently I am refreshing my own engine S1000rr just the way you did yours and unfortunately I am stuck at the part where you set the timing/position of the cams and I don't have the specific tool that you are using to check if the cams are in the right place at 10:48 part of the video, is there a way where I can set the timing without that specific tool as I don't have access to that tool :( Quick response will be much much appreciated as I am currently very upset that I wouldn't be able to set the timing correct again :(
Love hearing you explain valve and engine theory! Curious how/if you can adjust ignition timing (note I don't have knock)... is it fully CPU controlled? Does it adjust dynamically after valve timing changes?
I have a question about the camshaft position. I set TDC but my instructions from bmw show to install the cams 180* opposite of how you have it (with the 2 screws facing above the alignment marks. But when I continue to turn the engine over back to TDC the cams are flipped over to how you have it to begin with. So I’m confused which is right?
Thank you sir. So 0.85mm equals 0.0335” for the squish which is nice for an 80mm bore. I’m really impressed with this engine. I’ll do some more research and see if I can find what the VE is for this engine.
Sooooo correct me if I'm wrong soo with this. That is why you can't just change an stock exhaust and headers without tuning it? As they've designed the engine to work with the exhaust and cat down to how the engine is timed.???
You can change the exhaust, but it'd always benefit from having the fuelling and ignition mapped correctly. Nothing in the engine needs changing though
Hello mate I have a question to ask regarding piston to valve clearance on a 2014 BMW s1000rr. I had my cylinder head ported and milled .015,and wanted to know what should the minimum PTV clearance be?
Bmw don't give any figures for p-v so it'd be your decision. Also remember that cam timing and squish will have altered, but there is an option on head gaskets so I'd start with checking squish or compression ratio
Thanks mate! You're correct about cam timing and squish being altered after a heads milled. I do have choices of head gaskets to use ,what squish clearance could I run after those changes?
When you performed the squish clearance measurement what values did you get? Also you mentioned doing piston to valve clearances from previous s1000rr what were those values?
Awesome series! Can you hone the cylinder walls and install new piston rings? Or are the walls lined with some fancy coating? I bored out my tired old ZX-9R engine and she runs amazing now.
@@obsession_engineering have you had any experience with cylinder nikasil plating in the uk? wanted to get a +3mm overbore for a zx10r but could only find a US company to plate
Dave when you have timed everything up and cylinder 1 & 4 are at TDC what stroke is number 1 going into next? I was thinking that the position of the lobes will help so someone without the timing tool didn’t fit the cams 180° out, because obviously 1 and 4 will have just completed a stroke where the valve will have been open, so the cam lobes will have just finished opening and closing the valve and be in a certain position, and if you fitted them 180° out I’m thinking it should be clearly obvious. I’m struggling to see looking at the cams which stroke 1 & 4 have just finished, I’m thinking cylinder 1 has just finished the exhaust stroke so it’s going into the induction stroke and 4 has just finished it’s compression stroke and is going into it’s power stroke????? I had it in my mind when you set TDC it always meant cylinder 1 was going into the power stroke. I am probably way wrong 🤦♂️
I’m almost certain 1 is about to start it’s induction stroke and 4 is about to start it’s power stroke, that would mean 2 is about to start it’s compression stroke and 3 is on its exhaust stroke. That would also tie in with the 1-3-4-2 firing order if that’s the correct order. So knowing this it would make it easier to not fit the cams 180° out, that’s my thinking anyway. Like you say putting your own marks would help, is there any reason why the cam gear has a mark opposed to each other? I’d have thought it would be easier with just the one but I’m sure there is a reason behind it.
The cams have marks on them, as does the cam drive gear to the crank. As long as the cam lobes are either facing towards or away from each other it doesn't really matter if its 1 or 4 that will be on the power stroke next.
@@obsession_engineering thanks for the reply Dave. Does the ignition timing come from the cams? The cam shaft sensor? So if you fit the cams either way, the spark timing will fillow? So essentially if you have 1 at TDC power stroke next but fit the cams 180° then that would make 1 TDC induction next which wouldn’t work unless the spark timing changed as well, which if it does then you can’t really go wrong. I’m guessing the timing tool fits in when they are 180° rotated? I’ve watched a video where the TDC is set but unlike this video cylinder 1 is going into the power stroke, and the timing tool slots in, so I’m guessing it will fit either way.
@obsession_engineering thanks for your reply I wat he'd re watched and watched again managed to remove came inspec the rocker Arms and re install today. All running fine thanks for the videos !!
and now bmw have adjustable valve shaft , but the complete moped rise up to 22k €uromony without thyssen-krupp wheels ... i'am happy in traffic within ↖️ the little-big one need approx. 1.2 for round about 100km (you can be sure she is faster than pedestrian , in-line skaters and planty more slow motion enthusiast" ) -thanks for explaning a bit out of historie 👏✌️🍀
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Amazing chat on Cams, thank you!
Thanks for such a comprehensive, hugely fascinating & entertaining series Dave. You've certainly given me a greater knowledge of engine theory & dynamics - which will (hopefully) lead to better practical application & practice. Bravo Sir!
Thanks for that schooling on the valve timings, Super 👌
Loving the quality work.
Ur channel or video Are the 1st which I saw has no negative feedback. Awesome videos and great stuff of knowledge U have in there . Keep it going .
Many thanks, and I'm good at bribing the negatives, lol
Really appreciate the knowledge you gave.
I definitely feel more familiarized when working on my s1000rr.
Love your style and humour 👍. I will have to bring my bike over when it's finished and all this madness is over.
Great stuff Davy, a simplish explanation for a complicated subject. 👍
Excellent! I reckon you could do a great "contrast and compare" Suzuki, BMW and Honda variable valve timing techniques.
thanks for the upload, always a good watch.
Love this series interesting stuff. Even the nerdy moments lol
I think this is ace, if that makes me a nerd, then so be it.
Wow amazing video very informative, just bought a 2nd gen and have rebuilt my fz1 engine so this made lots if sense as I am no mechanic myself 👍👍
Hi bud, start doing vids again 😂👍
veritable valve timing is some crazy technology
It is, but these engines aren't variable timing
Is it normal for the number three cylinder exhaust lobes ride on top of the rocker arms before placing the caps?
the cam. #3 exhaust. Cam Teeter totter's. The weirdest part is that the chain matches up (I marked them with color dots like you said) with the gears on the cam. As well as on the crank gears. It should all be fine.
But yet everything lines up everywhere else. Intake cam is flat and seated in the motor.
Cam gear marks line up.; such as the exhaust gear lines up with head. The crank- two markings line up.
It’s the exhaust cam that doesn’t seat into the motor it Tedder totters at #3 lobes.
One cylinder will always be on cam when fitting the cams, as there's never a point that all valves are closed in a conventional il4 engine. Assuming that's what you mean.
If its not, you can email some photo's to me via the website
Hello, Hope you are fine and doing great. I watched the whole Engine Refresh series on this Engine Which has been really helpful! everything explained perfectly :)
Though currently I am refreshing my own engine S1000rr just the way you did yours and unfortunately I am stuck at the part where you set the timing/position of the cams and I don't have the specific tool that you are using to check if the cams are in the right place at 10:48 part of the video, is there a way where I can set the timing without that specific tool as I don't have access to that tool :(
Quick response will be much much appreciated as I am currently very upset that I wouldn't be able to set the timing correct again :(
Love hearing you explain valve and engine theory! Curious how/if you can adjust ignition timing (note I don't have knock)... is it fully CPU controlled? Does it adjust dynamically after valve timing changes?
The ignition is totally ECU controlled but the ECU can be unlocked by BMW dealers and then the RCK calibration kit is great for fine tuning
I have a question about the camshaft position. I set TDC but my instructions from bmw show to install the cams 180* opposite of how you have it (with the 2 screws facing above the alignment marks. But when I continue to turn the engine over back to TDC the cams are flipped over to how you have it to begin with. So I’m confused which is right?
Cams will only travel 180 degrees when the crank does 360 to get from tdc back to tdc, so both will be correct
Excellent video series. Sir, what is the squish specs for this engine?
Bmw don't give a measurement, but most are around 0.85mm
Thank you sir.
So 0.85mm equals 0.0335” for the squish which is nice for an 80mm bore. I’m really impressed with this engine. I’ll do some more research and see if I can find what the VE is for this engine.
Sooooo correct me if I'm wrong soo with this. That is why you can't just change an stock exhaust and headers without tuning it? As they've designed the engine to work with the exhaust and cat down to how the engine is timed.???
You can change the exhaust, but it'd always benefit from having the fuelling and ignition mapped correctly. Nothing in the engine needs changing though
@@obsession_engineering thank you Dave
Hello mate I have a question to ask regarding piston to valve clearance on a 2014 BMW s1000rr. I had my cylinder head ported and milled .015,and wanted to know what should the minimum PTV clearance be?
Bmw don't give any figures for p-v so it'd be your decision.
Also remember that cam timing and squish will have altered, but there is an option on head gaskets so I'd start with checking squish or compression ratio
Thanks mate!
You're correct about cam timing and squish being altered after a heads milled. I do have choices of head gaskets to use ,what squish clearance could I run after those changes?
When you performed the squish clearance measurement what values did you get? Also you mentioned doing piston to valve clearances from previous s1000rr what were those values?
Awesome series! Can you hone the cylinder walls and install new piston rings? Or are the walls lined with some fancy coating? I bored out my tired old ZX-9R engine and she runs amazing now.
They're plated bores, so big bore option but they do wear well. I usually flex hone to break any polish off and alpha sell rings as bmw don't
@@obsession_engineering Nice, thanks for the reply :)
@@obsession_engineering have you had any experience with cylinder nikasil plating in the uk? wanted to get a +3mm overbore for a zx10r but could only find a US company to plate
Dave when you have timed everything up and cylinder 1 & 4 are at TDC what stroke is number 1 going into next?
I was thinking that the position of the lobes will help so someone without the timing tool didn’t fit the cams 180° out, because obviously 1 and 4 will have just completed a stroke where the valve will have been open, so the cam lobes will have just finished opening and closing the valve and be in a certain position, and if you fitted them 180° out I’m thinking it should be clearly obvious.
I’m struggling to see looking at the cams which stroke 1 & 4 have just finished, I’m thinking cylinder 1 has just finished the exhaust stroke so it’s going into the induction stroke and 4 has just finished it’s compression stroke and is going into it’s power stroke?????
I had it in my mind when you set TDC it always meant cylinder 1 was going into the power stroke.
I am probably way wrong 🤦♂️
I’m almost certain 1 is about to start it’s induction stroke and 4 is about to start it’s power stroke, that would mean 2 is about to start it’s compression stroke and 3 is on its exhaust stroke. That would also tie in with the 1-3-4-2 firing order if that’s the correct order.
So knowing this it would make it easier to not fit the cams 180° out, that’s my thinking anyway.
Like you say putting your own marks would help, is there any reason why the cam gear has a mark opposed to each other? I’d have thought it would be easier with just the one but I’m sure there is a reason behind it.
The cams have marks on them, as does the cam drive gear to the crank. As long as the cam lobes are either facing towards or away from each other it doesn't really matter if its 1 or 4 that will be on the power stroke next.
@@obsession_engineering thanks for the reply Dave. Does the ignition timing come from the cams? The cam shaft sensor? So if you fit the cams either way, the spark timing will fillow? So essentially if you have 1 at TDC power stroke next but fit the cams 180° then that would make 1 TDC induction next which wouldn’t work unless the spark timing changed as well, which if it does then you can’t really go wrong. I’m guessing the timing tool fits in when they are 180° rotated?
I’ve watched a video where the TDC is set but unlike this video cylinder 1 is going into the power stroke, and the timing tool slots in, so I’m guessing it will fit either way.
How can you be sure the timing is correct without the bmw timing tool ? Is there a way ?
There are markings on the cams and cam drive gears, which are pretty accurate. The tool just gives the exact position
@obsession_engineering thanks for your reply I wat he'd re watched and watched again managed to remove came inspec the rocker Arms and re install today. All running fine thanks for the videos !!
How do you install the timing chain
You can drop the cam chain in any time, it feeds in after the cases are together as there's plenty of room
and now bmw have adjustable valve shaft , but the complete moped rise up to 22k €uromony without thyssen-krupp wheels ...
i'am happy in traffic within ↖️ the little-big one need approx. 1.2 for round about 100km (you can be sure she is faster than pedestrian , in-line skaters and planty more slow motion enthusiast" )
-thanks for explaning a bit out of historie 👏✌️🍀
Long strokes lead to short strokes.....