Mushroom vent in rocker cover

[jazzdude]

I found a replacement sponge for the filter in the basket, do I also need to clean out the small hole into the rocker cover?

I would have thought that the mushroom filter foam is keeping out crap from incoming air from the engine bay into the rocker cover presumably the hole should not need cleaning, where as the flame trap wire wool is black.

But that hole looks tiny so I can't see it needing much to block it.

[BIG DUNC]

I would make sure it is clear before fitting the new piece of foam.

[jazzdude]

Is it a case of just poking a suitably sized drill bit through it?

Just concerned there might be some kind of one way valve there.

[bobfather]

There's no valve in there, it's just a hole. Yes they choke up very easily and quickly

[jazzdude]

That's great, thanks

[Boosted LS1]

It's there to restrict the amount of air entering the pcv circuit. Can easily get blocked so as other's have said, give it a clean with a needle or piece of wire.

[phazed]

If it is blocked it would be better to remove the cover to collect any debris.

My guess is that it is clear though.

[Boosted LS1]

Iirc you can actually pull it from the cover and then give it a clean. I'm sure I've done that in the past.

[phazed]

Boosted LS1 said:

Iirc you can actually pull it from the cover and then give it a clean. I'm sure I've done that in the past.

You can remove the plastic mesh cap and foam piece but the mushroom is part of the casting of the box.

[jazzdude]

phazed said:

You can remove the plastic mesh cap and foam piece but the mushroom is part of the casting of the box.

That's what I thought Peter

[Boosted LS1]

You're probably right, it's been a while since I had a rover rocker cover but I thort I'd pulled one out with a pair of pliers. In the dim and distant past.


That said, i just found this image, see item 55. Also looks like an alternative arrangement does have a fixed tube.

Edited by Boosted LS1 on Tuesday 27th February 14:40

[phazed]

Defo was a fixed mushy on mine.

[bobfather]

Just pulled mine off in order to clear and clean. Not difficult, the tube is inserted about 12mm into the rocker cover

[Mr Plow]

Mine pulls out as well with a bit of persuasion.

[tonys]

Mine also simply pulls out for cleaning.

[Classic Chim]

phazed said:

Defo was a fixed mushy on mine.

Mine seems fixed, I’ve tried easing it up but didn’t want to break it
Looking at Boosted’s drawing
It comes in three parts so shouldn’t I just be removing part 54 from part 55 so revealing part 53
And not pulling the whole thing from the rocker cover.
Should part 54 be turned or just eased up and off part 55?

[bobfather]

It's an interference fit. If you remove the cover and foam element you should be able to ease it out using a stilson or similar device to rotate it. That's how I get mine out

[jazzdude]

Rotated it and the put the angled end of a crowbar under it and it just pooped out

[Steve_D]

Classic Chim said:

Mine seems fixed, I’ve tried easing it up but didn’t want to break it
Looking at Boosted’s drawing
It comes in three parts so shouldn’t I just be removing part 54 from part 55 so revealing part 53
And not pulling the whole thing from the rocker cover.
Should part 54 be turned or just eased up and off part 55?

54 is plastic and clips onto 55 so when released will come away with 53 (foam) inside it.

I think peeps are getting a little precious about this. The hole in 55 is absolutely tiny. I'm guessing around 0.5mm so if you use a twist drill to clean the hole the amount of carbon/oil that will fall down inside is minuscule. I bet 50 times that amount of dirt will fall in for each rocker cover you remove.

Steve

[bobfather]

Steve_D said:

I think peeps are getting a little precious about this. The hole in 55 is absolutely tiny.

Steve

The hole is actually 1mm.