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Cam Shaft / Oil Pump End Float


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#1 JonnyAlpha

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Posted 03 December 2019 - 09:24 PM

Hi;

 

Can someone enlighten me as to how I go about checking and resolving CamShaft End Float to ensure maximum oil pump efficiency?

 

Many thanks 

 

 



#2 nicklouse

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Posted 03 December 2019 - 09:26 PM

Nothing to do with the camshaft. Vizard tells you how in his book.

 

opps not in there. But basically radius the edges and reduce the rotor to plate clearance. Can’t remember the figure though.


Edited by nicklouse, 03 December 2019 - 09:34 PM.


#3 JonnyAlpha

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Posted 03 December 2019 - 09:33 PM

Ah just found this piece:

 

http://www.minispare...29.aspx|Back to

 

The Camshaft Retaining Plate - seems that it sets the end float?



#4 JonnyAlpha

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Posted 03 December 2019 - 09:34 PM

Nothing to do with the camshaft. Vizard tells you how in his book.

 

Do you mean Crankshaft End Float? I am happy with that?



#5 ACDodd

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Posted 03 December 2019 - 09:59 PM

Cam endfloat is set by the camsprocket interacting with the retaining plate. Adjustments are made by machining the back of the cam sprocket.

Ac

#6 JonnyAlpha

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Posted 03 December 2019 - 10:55 PM

So,
(a) How do you check it, do you fit the oil Pump and then put a DTI Gauge on the cam sprocket. And lift the sprocket with a screwdriver?
(b) What if any are the tolerances?

#7 grizzler73

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Posted 03 December 2019 - 11:07 PM

If I remember correctly, you fit cam with end plate and cam sprocket and lever to check float, pump just drives off the end of the cam, float is separate to that.

#8 nicklouse

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Posted 03 December 2019 - 11:53 PM

 

Nothing to do with the camshaft. Vizard tells you how in his book.

 

Do you mean Crankshaft End Float? I am happy with that?

 

What do you mean? You are talking about two totally independent things. The cam and the pump are totally separate in any settings.  



#9 ACDodd

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Posted 03 December 2019 - 11:57 PM

The oil pump has nothing to do with cam endfloat, period.

Endfloat tolerance is 0.003 to 0.007".

Ac

Edited by ACDodd, 03 December 2019 - 11:58 PM.


#10 Ethel

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Posted 04 December 2019 - 01:39 AM

When you bolt the sprocket to the cam you create a groove that the retaining plate sits in. The endfloat is how much bigger the groove is than the plate. As AC says it's the step on the inside of the sprocket that gives the width of the groove so machine step down to reduce the clearance or machine the sprocket next to the step to make the step bigger.

You want the internals of the oil pump to be free of any side load, so it's a good idea to fit the cam first so you can be sure the pump drive end doesn't bottom out on the pump. Test fit without the gasket.

#11 Rorf

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Posted 04 December 2019 - 01:38 PM

If the old cam plate has been worn by the previous cam sprocket then install a new cam plate. Install the new sprocket, nip the cam bolt up and check the float; 3 to 7 thou is ok.



#12 JonnyAlpha

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Posted 04 December 2019 - 08:31 PM

Cam endfloat is set by the camsprocket interacting with the retaining plate. Adjustments are made by machining the back of the cam sprocket.

Ac

 

AC what confused me was when discussing Oil Pumps, you mentioned "Use a standard oil pump. Check the endfloat before fitting. Adjust the pump endfloat to 0.003" for maximum scavenge." . What and how do you check the Pump End Float if the Cam and Pump End Float are two different things?



#13 grizzler73

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Posted 04 December 2019 - 09:05 PM

The interface between the pump face plate and the pump rotating parts. Nothing to do with the cam.

#14 nicklouse

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Posted 04 December 2019 - 09:39 PM

 

Cam endfloat is set by the camsprocket interacting with the retaining plate. Adjustments are made by machining the back of the cam sprocket.

Ac

 

AC what confused me was when discussing Oil Pumps, you mentioned "Use a standard oil pump. Check the endfloat before fitting. Adjust the pump endfloat to 0.003" for maximum scavenge." . What and how do you check the Pump End Float if the Cam and Pump End Float are two different things?

 

Take the pump to bits and measure and adjust to suit. This is done off the engine and has nothing to do with the cam.



#15 ACDodd

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Posted 04 December 2019 - 10:06 PM

Oil pump endfloat is as Nicklouse stated. Aim for 0.003" on the oil pump.

Ac




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