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MG MG Y Type - Camshaft options

I find my valve gear far too noisy....bottom.end of engine is all newish so having bought new rocker arms and shaft any thoughts on new camshaft options
...Edney does one but views sought....do the cam bearings need changing and how to decide. Any one ever considered rubber timing belt mods etc? Just a mad thought...maybe someone does a rocker cover muffler!
D MULLEN

David

Why not just have your existing one reprofiled?

I suggested this to a member earlier (sorry - forget who!) and he made enquiries in the UK and came back to me with some a) seriously silly £numbers and a horrendous wait time. So I had him mail me (tracked insured absolutely) his cam and I sent it on to Tacoma Camshafts (see Links Page) and they reprofiled it and sent it back to him in less than 2 weeks and for about $100 plus I think it was about $20 or $30 tracked insured shipping.

Tacoma Cam will also reseat your cam buckets too for you if you want. They are clearly local to me and I have had several very good experiences with them and highly recommend their services ... even for world wide customers such as yourself David. They take credit cards and can be contacted by phone or email. If you call, remember our time zone is 8 hours BEHIND UK time so 5pm UK is 9am here.

If you take your cam out (and then just put it back in again) ALL camshaft bushings will need to be replaced and the front one from memory really benefits from a professional reemed installation so it IS an Engine OUT job ... but you probably knew that.

Highly recommend Tacoma Camshaft - cant say enough good about them. Ask them nicely and they will include one of their great T shirts for you too - very cool item in itself!

Paul
Paul Barrow

Dave,

Before I give you my recently acquired knowledge on this subject....which Edney are you talking about...Peter or George...?

Rob
Rob King

Very good question Rob as there is a significant difference :)!
Paul Barrow

I'm not convinced that you need to replace all the camshaft bearings. They are quite substantial and on my engine they were not worn, so I reused them.

I had the cam and followers reprofiled and hardened by CAT cams in Belgium and they seem to be holding up fine. If memory serves me right it was about EUR 300,-.

Before you rip the engine to pieces for a rattle, please check first if all the end of the pushrods are tight. If necessary warm heat them thoroughly when testing.
I did my engine because of the loud noises and that turned out to be caused by two pushrods; one bent and one with a loose end. That was discovered after the rebuild....
Willem van der Veer

Paul,

Sorry to be butting in from the MGB & Spridget side, but is the name Tacoma Cam the correct name or an alternate name for Delta Cam in Tacoma WA? Delta did the cam for my B and they were affordable, quick, and a pleasure to deal with.

Charley
C R Huff

Having replaced a camshaft recently I found that there was no difference in the amount of tappet noise.
First check the amount of lift you are getting at the top of each pushrod by setting up a dial gauge they should all be equal and according to the manual if the shaft is the original. If it is not worn why replace it.
I don’t think it is possible to buy a Y camshaft. I know The Octagon Club only supply the TD camshaft with a higher lift which is as used in the YT and is desirable anyway. Picture shows Y and TD shafts. Check that the followers are rotating in use the wear on the surface should be even and not in one direction. No pitting or concave surface evident.
The most important thing is to get a good supply of oil onto the cams. This can be achieved by replacing the followers with modified ones with grooves down the side to allow more oil to flow on to the cams. Edney supplies these.
If you do replace the shaft the middle bearing has to come out to get the shaft out and is probably best replaced.
Peter


P W Vielvoye

A lot to think about...particularly the lift being given and condition of push rods etc...Rob....the Edney I was referring to advertises new cams on ebay...presumably higher lift ones....claims they are better...I never knew the push rod ends were separate but fixed to the rod but they are apparently. Thanks for advice so far guys...I really need to take the cam out later in the year and check it....not quite sure how to check push rods for wear if they look ok to the eye? Must also check cam followers not sticking. ...
D MULLEN

Hi I have a YA when I first got the car my tappts were very niosy even after adjusting,having checked the ends of the rocker arms and found the not to be badly worn I opted to check the claerance with a dial gauge I set the claerance as the manuel said .And found the tappets to be a lot quieter there is still a slight tap but a lot better.
p west

Hi Charley - you are 100% correct, my bad - DELTA CAM or Tacoma Cam is correct. Fraudian slip! Delta are superb, fast and cheap. Cheap actually is the wrong word, prbably better to say Properly Priced. Amazing that someone in the UK can ship a cam to me, I can send it to them, they can work on it and ship it back to the UK at a lower price and faster than a UK based shop!!

Paul
Paul Barrow

Just to remind everyone that there was fitted to the Y a special low lift cam 6.5mm I think. This was intended to restrict the performance of the engine even if twin carbs are fitted. Fitting the T type cam will improve the air flow and BHP with little extra stress on the engine. Bryan
B Mellem

By the way if new cam followers are fitted to the original 6.5 cam check that the oil holes in the followers are emerging up into the chest. My replacement T Type ones did not rise enough to allow oil into the followers. Just take care to check Bryan
B Mellem

Sorry to keep coming back, if you fit a TF cam as I have this you will find is much quieter due to only 12 thou tappet clearance.
B Mellem

Tighe Cams here in Brisbane Australia did a batch of 100 blank camshafts for T-Series - you can have one ground to any spec you want, and they have a modified profile to reduce tappet noise. Good price too.

Most T-type cams have such a small base circle when worn, that it is unlikely they can be reground without making the base circle a lot smaller again and weakening the shaft.

By fitting a new shaft with a larger base circle, allows the profile to be modified to reduce the tappet noise. They will reface your tappets as well for the new camshaft.

Good people to deal with.

Tony
Oz Rep IMGYTR
A L SLATTERY

Hi Paul it was myself that you arranged for the cam-shaft to be sent to you. It all went perfectly good re-profiling and the cost was very very reasonable. Gordon Cotter
G.R Cotter

Well I stripped the rocker shaft and found the following horrors. ...all 8 rocker arms were worn ....the rocker shaft was upside down with oil holes at the bottom. . .one push rod was loose at the end where the weld had failed and 4 of the 8 cam followers had pitting underneath. ..the camshaft fortunately looks fine so no wonder the valve gear was noisy....and no one to blame but me for doi g it so.e years ago...now replacing the shaft and cam followers and rocker arms as well as a couple of push rods..hopefully this will improve matters.


D MULLEN

Meant to also say dont forget to read Neil Wakeman's article called Installing Rocker Gear (should be on this site I think) which I found really useful.
D MULLEN

This thread was discussed between 21/04/2014 and 03/07/2014

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