Oil filler cap/cam cover
Posted: Wed Apr 26, 2017 10:57 pm
Hello, I alluded to this in another post but think it may be more appropriate to start a new one of my own.
I'm having another go at fixing the leaks from the oil cap and have discovered a few things in the process.
First of all I removed the paint from the lip of the filler neck to try and achieve a flat surface for the rubber seal, this resulted, somewhat understandably, in the leak getting worse until I fitted a new seal. With the new seal fitted there was a slight improvement and a further one when I packed out the seal with a bit of cardboard between it and the cap. This resulted in the leak being reduced to the point where there is a just slight dribble from either side where the locking pins are.
So I tried to bend the tabs that engage with the pins but they just spring back again. Right, I think, looks like the tabs have gone soft, maybe I should try one of those machined-from-a-billet replacement caps that are now available. So I trundle off to Paul Matty.
45 quid lighter (ouch!) I fit new, very shiny - shiny helps a bit - oil cap. They use an 'O' ring to seal and come with two thicknesses of ring to try. Unfortunately, despite it's very shininess, the leak is exactly the same as with the old cap... hmmm, I just bought a 45 quid paper weight then.
So it would seem that the problem is the that tabs in the cam cover aren't pulling the cap down enough. I could try more packing and bending of the original cap but it would be nice to get the new (shiny) cap to work.
My question, finally, is, are the pins in the cam cover part of the casting or are they pressed in and could they be bent down a bit or will they just snap off?
Did I mention the new cap is nice and shiny?
Ta
Robbie
I'm having another go at fixing the leaks from the oil cap and have discovered a few things in the process.
First of all I removed the paint from the lip of the filler neck to try and achieve a flat surface for the rubber seal, this resulted, somewhat understandably, in the leak getting worse until I fitted a new seal. With the new seal fitted there was a slight improvement and a further one when I packed out the seal with a bit of cardboard between it and the cap. This resulted in the leak being reduced to the point where there is a just slight dribble from either side where the locking pins are.
So I tried to bend the tabs that engage with the pins but they just spring back again. Right, I think, looks like the tabs have gone soft, maybe I should try one of those machined-from-a-billet replacement caps that are now available. So I trundle off to Paul Matty.
45 quid lighter (ouch!) I fit new, very shiny - shiny helps a bit - oil cap. They use an 'O' ring to seal and come with two thicknesses of ring to try. Unfortunately, despite it's very shininess, the leak is exactly the same as with the old cap... hmmm, I just bought a 45 quid paper weight then.
So it would seem that the problem is the that tabs in the cam cover aren't pulling the cap down enough. I could try more packing and bending of the original cap but it would be nice to get the new (shiny) cap to work.
My question, finally, is, are the pins in the cam cover part of the casting or are they pressed in and could they be bent down a bit or will they just snap off?
Did I mention the new cap is nice and shiny?
Ta
Robbie