15 replies to this topic

[happydude2012]

Tapping sound - links with my post on engine conundrum.

Full description there.

 

Any ideas chaps.

 

https://youtu.be/K0PNigdDzmo

 

https://youtu.be/YftjeMGZB0E

[unburntfuelinthemorning]

If valve clearances are correct I'm going for worn rocker shaft as Bat suggested.

[happydude2012]

If valve clearances are correct I'm going for worn rocker shaft as Bat suggested.

 

Worn rocker shaft? sounds like something i can sort out with a new set of rockers - what gives you that impression by the way?

[unburntfuelinthemorning]

Just a guess of course and you'll need to inspect it yourself.  They do wear and that can make it difficult to elliminate valve train noise.  I don't know if you're using the standard rocker shaft with your roller rockers or not - Minispares do a nice upgraded one at a very reasonable price if your rockers will fit.

 

http://www.minispare...50.aspx|Back to

[nicklouse]

don't think it is the shaft. sounds too fast for one rocker and I would expect more noise as most rocker shafts I have seen worn are worn fairly evenly.

[happydude2012]

hmm, so the jury is still out.

[unburntfuelinthemorning]

I think either you or the man who can that you know need to do some investigative work to find out what the problem is as it's very hard to diagnose from a distance.

[happydude2012]

yeah of course - i just thought somebody with some experience might be able to recognize the problem at face value. 

[Retroman]

It sounds very tappety, could be several things combining to make the racket and strange running;

 

Worn rockers, bearings / bushes and shaft [as they are 1.5's] worn cam lobe and follower or 2

[GraemeC]

Have you modified that rocker cover?
1.5s foul on the MG metro covers.

[nicklouse]

Have you modified that rocker cover?
1.5s foul on the MG metro covers.

 in his other thread he says it is there with the cover removed.

[GraemeC]

Maybe one thread would help.

I’d still be fitting a cover that is known not to be an issue, rather than one that is.

[happydude2012]

its not the rocker cover Graeme - yeah sorry theres 2 threads.

the more i hear about 1:5 1 rockers, the more i think they are to be avoided. 

AC Dodd told me yesterday he never fits them on his cams.

 

Anyone make a suggestion for fast road cam and rocker combination? 

[Retroman]

VP3C and 1.4 rockers 110 from a fast road 1360 Longman head Vizarded H4 carbs

 

Its a giant killer, pulls like a train

 

[happydude2012]

oh wow! thats something else!