Camshaft end float

[ToadofToadHall]

Hi,

As indicated in my previous post I am reassembling a 2.2 engine.

Whenever dismantling an engine or anything with a large number of parts, said parts are all bagged and tagged. Perhaps something got away in the process. One thing is for certain the old memory isn’t what it once was.

Does anyone know how the end float is taken up in the camshaft please?

Although the front plate and camshaft locating plate are not yet fitted it is easy to position the cam correctly in the block. This appears to leave room at the rear, maybe for some kind of thrust to be applied. In my bagged and tagged box of bits there doesn’t seem to be anything that fits the bill. I have a manual and two binders of exploded diagrams but sadly no mention.

[ToadofToadHall]

Thanks for your reply Dave.

So the front camshaft retaining plate and the timing sprocket are the only thing taking up the end float, yes?

I will get a crankshaft shim ordered thanks. The lip seal is definitely something that is going to be changed as I dislike felt seals a lot. Though I was going to attempt to fit one to the original timing cover as I didn’t know the exchange unit was available.

• This reply was modified 2 years, 8 months ago by ToadofToadHall.

[ToadofToadHall]

Thanks Dave,

Got the sprockets and the shim from Ah Spares along with a number of other bits.

[number5]

Hi-just a note on the cam sprocket, in that I recently read that these are being sold by some suppliers without the front cover.  Did you supplier mention about removing the one from the original and attaching it to the new one.

Regards-Peter.

[number5]

Hi there Dave,

Some time ago,  a Healey owner mentioned that the reason for the plate attached to the upper  cam gear is to ensure that there is an adequate supply of oil is fed onto the chain.  Over the past 55 years, having worked on numerous engines, including three Atlantic and two A70 rebuilds in the past 1o years, I have never come across an engine where there was no plate attached to the upper timing cog.

Whether or not this is the reason the original designers put it there in the first place, I can’t say, but there must have been a reason, and I would not fit the cog without it attached.  My current coupe has travelled 300.000 miles,  with only the chain and tensioner changed during rebuilding it last year.  On my previous convertible, undertaking me 475,000 miles over 20 years of everyday driving, not quite sure of the mileage, but perhaps just over half of them, a new chain, tensioner, bearing shells and a set of new pistons,  fitted whilst the engine was still in the car.  On both that car, and my coupe, both still have the original crank and cam cogs.  Now,  20 years on since parting with the convertible, although now used as a club car, the engine still runs extremely well.

Has the supplier of the chaps replacement parts given any reason as to why the plate has been deleted. It would be interesting to hear such.

Regards-Peter.

 

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