20 replies to this topic

[jamesy]

Wondering how much sideways movement the camshaft should have, dismantled the engine a year ago and can't remember if I am missing something. I appear to have space for the cam to move 1-2mm, maybe once I've tightened up the retaining plate it will tighten up (I've lost the bolts, waiting on new ones)?
Only new bits are oil pump and retaining plate. Should there be a thrust vwasher under the retaining plate?

Basicly is a wee bit of movement normal or have I misplaced something else?

[carbon]

Camshaft end float is controlled by clearance between the thrust washer (triangular, 3 holes) and the cam end face / sprocket inner face. To measure the endfloat the sprocket needs to be fitted and torqued up.

 

Hopefully the measured end float will be a lot less than 1 - 2 mm, the spec is 0.076 to 0.178mm (3 to 7 thou in old money)

[jamesy]

Camshaft end float is controlled by clearance between the thrust washer (triangular, 3 holes) and the cam end face / sprocket inner face. To measure the endfloat the sprocket needs to be fitted and torqued up.

 

Hopefully the measured end float will be a lot less than 1 - 2 mm, the spec is 0.076 to 0.178mm (3 to 7 thou in old money)

 

cheers, i will get the feeler blades out when i get the correct bolts.

[jamesy]

retaining plate all torqued up now, still got roughly 1mm movement. why, i cant work out, i didnt take note what movement there was 2 years ago when i stripped it.

 

really paranoid i forgot to remove the old seal or put two new ones stuck together when i was replacing the oil pump. 

 

any ideas? 

 

is my only option to completely strip the clutch end again and check the oil pump?

[Dusky]

I think there only is a minimum clearance stated in the manual because the cam thrusts to 1 side.
Tho 40 thou might Be a tad excessive..
How did you measure?

Edited by Dusky, 22 November 2016 - 10:33 PM.

[Swift_General]

End float is not controlled by the oil pump. When you say 'roughly 1mm' how are you measuring the end float. You need to be a little more precise so we know what you're dealing with. Also you need to torque the sprocket up, not the retaining (triangular plate) as carbon has already said. Finally is there any wear in the triangular plate. If there is get a new one. They are not expensive.

[nicklouse]

retaining plate all torqued up now, still got roughly 1mm movement. why, i cant work out, i didnt take note what movement there was 2 years ago when i stripped it.
 
really paranoid i forgot to remove the old seal or put two new ones stuck together when i was replacing the oil pump. 
 
any ideas? 
 
is my only option to completely strip the clutch end again and check the oil pump?

And the sprocket? As already mentioned. All is controlled at the timing end.

[Spider]

If the Cam is ground as the factory did them, ie, tapered, then as long as you have a minimum of 0.003", the end float over this doesn't matter one iota.

 

If, on the other hand, the lobes are flat ground, then you need to check the end float and you'd want it in the 0.003 to 0.005" Range along with matching (odd-ball) cam followers.

Edited by Moke Spider, 23 November 2016 - 04:45 AM.

[jamesy]

End float is not controlled by the oil pump. When you say 'roughly 1mm' how are you measuring the end float. You need to be a little more precise so we know what you're dealing with. Also you need to torque the sprocket up, not the retaining (triangular plate) as carbon has already said. Finally is there any wear in the triangular plate. If there is get a new one. They are not expensive.

 

I couldnt work out how the end float was controlled, i was sure it wasnt the oil pump, but was just thinking out loud as to what could give it space to float so much.

 

It was measured simply with a steel rule held on the end of the retaining, plate, without the sprocket on there is no other way, i k ow its not accurate enough, but it was close enough to worry me!

 

So if i put the sprocket on, torque it up, then measure the float between it and the retaining plate?

 

Retaining plat in new, and so is the oil pump. Haynes isnt very clear on how the end float is worked out.

Edited by jamesy, 23 November 2016 - 07:01 AM.

[ACDodd]

Endfloat is checked and set with the cam sprocket fitted. Tolerance 0.003 to 0.007"

Ac

[Pigeonto]

And after you have done what AC says, then you use the steel rule to check the crank and cam sprockets are properly aligned, using shims behind the crank sprocket to correct if necessary

[jamesy]

I see, thank you @ACDodd and @pigeonto. I wasn't realising that the retaining plate get sandwiched quite tight between the cam and sprocket.

I will get the sprockets and chain on and report back.

I know your all thinking, "he used a steel rule for what?! Omg he shouldn't be building an engine." It's what I had to hand. Was going to use it for aligning the sprockets. Every day is a school day, it's all part of the mini adventure. :) cheers folks.

Edited by jamesy, 23 November 2016 - 08:52 AM.

[Swift_General]

Not necesaey to put the chain on to check end float (in fact but it would get in the way) but sounds like you've got it. Best of luck.

[jamesy]

Sprocket on. Torqued up, and I've now got 0.0035 of endfloat. Checked with feeler gauge. Cheers for the help folks. :)

Edited by jamesy, 23 November 2016 - 01:35 PM.

[jamesy]

Next stupid question, how tight should the chain tensioner be?
The Haynes is very vague on the subject as far as I can see.

Edited by jamesy, 23 November 2016 - 08:11 PM.