52 replies to this topic

[Gr4h4m]

Timing chain end?

[59 Speed]

Does it make the clicking noise with the head off? If you can, remove the head and put the pushrods back in, turn the engine over and see if the pushrods move, if they don't it could be a sticky follower.

Also with regard to the 16 thou gap, would this be the correct spacing if you are using 1.5 rockers? I thought that the gap would larger due to the 1.5 rockers.

http://www.minimania...earances__lash_

Edited by Smackfiend, 04 June 2016 - 09:48 AM.

[Midas Mk1]

Im thinking it could be spring binding as it sounds top end, also if it was a sticky follower / cam, what are the chances on it being on all 4 pistons?

 

Im thinking maybe the springs I have fitted are not strong enough for the spec? 1.5 rockers, 276 cam?

 

 

These are the ones I fitted :

 

http://www.swiftune....ve-springs.aspx

 

 

These are what i'm thinking I should have got?

 

http://www.swiftune....ve-springs.aspx

[phil hill]

The first set of springs you listed will be fine with a 276 cam.

 

The SW10 is a 286 cam, which is specifically listed as suitable with those springs

 

Phil.

[Midas Mk1]

The first set of springs you listed will be fine with a 276 cam.

 

The SW10 is a 286 cam, which is specifically listed as suitable with those springs

 

Phil.

 

Thanks Phil, Would the 1.5's make any difference? The spare head I tried came off my 1312 which had an sw10 on std rockers
 

[phil hill]

Thanks Phil, Would the 1.5's make any difference? The spare head I tried came off my 1312 which had an sw10 on std rockers

I'm running an SW10, which from memory has more lift than the 276, with 1.5 rockers and similar springs (but not the exact same Swiftune ones) without going coil-bound.

Have you checked that you are not going coil-bound ?? Wind the engine over till you reach full-lift, then check that the valve spring coils are not touching together at full-lift. If you can clearly see they are not touching then that's fine, if not see if you can get say a 10 or 20 thou feeler blade between the coils.

After that I would try removing the rockers completely, leave the pushrods in place and with a helper pushing on a couple of the pushrods wind the engine over and see if the movement of the pushrod is smooth or notchy. If notchy then you know it's something further down the cam, follower or pushrod area, if smooth then it's back to the rockers and upper valve train.

Phil.

[Gr4h4m]

I'm jumping in here but it's not the valves hitting the Pistons?

[phil hill]

Stupid thoughts - I watched the Video again...........

It's not the metal fan catching on the fan shroud on it's way around ??

Did you fit a duplex timing chain ?? If so did you : remove the oil catcher on the inside of the timing chain cover ?? Push out the dimple in the timing chain cover ?? Countersink the backplate screws ??

Phil.

[Gr4h4m]

Looking back at the video, the click only seems to happen when the exhaust valves are down, just as they are on the way up.

[Midas Mk1]

Thanks guys for your help really appreciate it! On with it now, took rockers off and all th pushrods turn, no notchyness all nice and smooth.

The fan was at some point catching, but isn't now, and the sound is coming from the rocker / head area.

It's got a minispares belt drive, we tripled checked when fitting.

[ACDodd]

Dial gauge.

Ac

[Midas Mk1]

Not got a dual gauge to hand atm.

Got one of our spare mg heads out of storage and fired that (totally standard)

Pistons look fine, no signs of damage or hitting

Exact same click, across all four cylinders. Will try the dial gauge tomorrow, ripping my hair out over this now

[Midas Mk1]

Also checked springs on full lift, no binding

[59 Speed]

With the head off / rockers off does it make the clicking noise?

[Midas Mk1]

Nope, without the rockers on the noise disappears, think I'm going to need to prepare for engine removal..