Right I'v had to build a new motor for my 3dr Cosworth so I'v been getting ready
For this for some time now as we didn't no 100% wot the problem was any way my motor has a BD14 inlet cam in it and a stander ex cam so I was on the look out for a new ex cam well a Newman BD10 ex cam come on eBay at the right price so as I'v built it all up and was putting it togever I was looking at the cam the box says ex the stamping on the end says ex but it had groves which say inlet ? So I tuck it that they must just put the grove in to help with oil I turnd the motor over by hand so to make shower that all was good then it was time to turn the key and it would not start but wot fit hit me was we had compreshin coming out of the inlet manifold ?? So the time was re checked 100% right so I looked in to why things were not right so off with the rock cover and have a look at wot the cams were boing well it worked out when the motor was at TDC the ex cam was open ??? So out with the cam a we got the old cam out to see wot was going on well i will let you have a look and see wot you think













YES 2 KEY WAYS to which i only sore one when i put it togever



im so lucky as we have put the standerd cam back in and done a compreshion test and iv got away with it thank god so the phone calls will start tomorrow about this problem

 

just looks like a cam that's designed to fit in both sides. I've never seen one like it, but no reason why it shouldn't work. You just need to stick the key in the right hole.

 

You could be right mate but Wots done my head in is why as its stamped as a ex cam boxed as a ex but could do a inlet as well I think the only thing that was on my side was I'v got valve cut outs in my pistons . I'm thinking it was a factory second that got out the factory this could of cost me 8 valves , new head gasget , and head bolts not good

 

Without sounding rude, I think the majority of people would clearly spot it had two woodruff keyways before fitting it. Tho i agree, that shouldn't be normal and makes you wonder how well the cam itself has been ground - Presumably you just timed it up the standard way and didnt time it in properly (Dti gauge etc) as that would have picked up your error straight away.
I'd deffo be questioning Newman if this is standard and if not then id be questioning if the ebay seller was aware of this cam being a dud

 

That cam looks badly machined too. Look at the pitting all over it. That would be going back if it was me. Two cut outs for wood-ruff keys? WTF?

Like you say i think that is a second or something.

 

im sure the inlet cam can be used in the exhaust side . mine had a 14 inlet used in the exhaust side and was fine and done by a tuner on here..

 

Yep, same here.......

 

The woodruff key does not even need to be there, the only purpose if for locating the pulley on build up and aiding people fitting them.

A common misconception is the woodruff key prevents the pulley from turning on the cam, it does not, in fact most modern engines do not have woodruff keys on the cam or the crank these days.

Simply a multi use camshaft that was not checked on build I'm afraid.

 

I agree with some of what you have put but the woodruff key does stop the pulley from moving/turning on the cam/crank, yes some new engines just use interrfearance fit but where the key is used it does stop movement.

 

Sorry but it does not, I have taken the woodruff keys out many a time to time cams in were non adjustable pulleys were not fit.

I remember back in the day when I was told the same, I didn't believe it either.
your choice.

 

No your misunderstanding me, I agree that taking the key out and doing the pulley bolt will stop it from moving on the cam, but where you have written the key doesn't stop movement, it clearly does stop any movement when fitted, it's logical physics that two moving parts locked together by what is basically a biscuit joint can't turn independently.

 

ok, but when the bolt is torqued up, it is not the job of the woodruff key to stop the two assemblies from rotating independently, it is purely for ease of assembly, nothing else.

 

Well we'll have to agree to dissagree on this because if this was the case why would they ever machine parts to accept key ways if they where never needed, plus they could quite easily of just dot stamped the cam and pulley for build location, I still think the key is there to do a job and as a precaution to stop slipping or any movement.

 

A Woodruff key is not man enough to transmit the torque required to turn the camshaft, it is there purely to make factory assembly easy. On the YB, the torque is transmitted by the bolt holding the sprocket onto the cam.

Years ago, I had a Suzuki GP125 which had a Woodruff key to locate the alternator rotor/points cam onto the end of the crankshaft to ensure the ignition timing was correct. It used to shear the key about every 500 miles as the tapered end of the crank was worn and not transmitting the drive. It only stopped shearing when I lapped the rotor onto the crankshaft with grinding paste. Never had a problem after that.

 

Keyways are used when there is not a feasible way to locate 'free' items in manufacture. Its an old and virtually obsolete tech nowadays. Production processes and engine design are state of the art now. Modern engines especially Fords hardly ever have keyways, the primary drive systems are designed with provisions to set the crank and cams with resusable tooling in plant ie peg and plate on zeta and sigma. Then as stated above the torque of the bolt is used to clamp the pulley to the shaft. Saves companies millions.

 

As I put, I know this and have said so, your reading past what I said, "a key way does and will stop movement of the pulleys" is what im referring to with marks earlier comment.

 

Give newman cams a ring and email them some photo's of the cam! They have always been very helpful with me !

01689-857109
info@newman-cams.com

 

A key way will not stop the pulley from moving if the bolt is not tight.

There is far to much force in the valve train to hold a small key into a piece of chill cast material.

It is purely there for production alignment, nothing else.

Slacken the bolts off and run the engine and see what happens.

First will be a noise as the pulley chatters across the cam and against the keyway, ok, it might give you an indication something is wrong, and people have been very lucky in this instance, but that is a by product of their design.

Having them is not to prevent the timing moving when the engine is running.

I am saying no more on this now