Alloy Rocker Cover

Post by **rio678** » Fri Apr 11, 2008 6:52 pm

Hi everyone

do you know where i can get an alloy rocker cover or my Moggie with a breather tube as i can't see any that has got them, they all seem to not have the breather!

Post by **bmcecosse** » Sat Apr 12, 2008 9:02 pm

It was only used on the MG Mutro - which had no rocker breather. Just use the standard cover with breather - the alloy cover is not correct on a Minor, and can increase valve gear noise !

Post by **PAULJ** » Sat Apr 12, 2008 11:21 pm

Im sure I've seen an alloy cover on a 1275 with a home made breather mounted where the mechanical fuel pump mounted.
It was a tube up the side of the block

Post by **bmcecosse** » Sun Apr 13, 2008 8:55 am

Indeed - extra breathing can be fitted there - but it's low down on the block and liable to collect oil! As long as some form of collector/oil trap is included, it works fine. The breather on the rocker cover is ideal for removing water vapour from the coldest part of the engine - remove it at your peril!

Post by **Kevin** » Tue Apr 15, 2008 12:44 pm

the alloy cover is not correct on a Minor, and can increase valve gear noise !

Hmm that's interesting as I was always told the Alloy ones are quieter as they are made from a softer thicker material and hence will quieten things down a little not make them noisier.

Post by **bmcecosse** » Tue Apr 15, 2008 9:42 pm

They tend to resonate - being rigid Aluminium.

Post by **Kevin** » Wed Apr 16, 2008 7:09 am

They tend to resonate

Oh well that's another piece of folklore exposed.

Post by **bmcecosse** » Wed Apr 16, 2008 9:04 am

Some also have trubble with the rockers banging against the cover - but usually that's just with high lift cam and/or high ratio rockers - although it can just be wrongly positioned rocker cover!