Probably internet rubbish then! lol See what happens when you take it for a proper run, 12 miles as you know isn't far.
Either way I'll be fitting it the wrong way up from now on, I don't like the "vent", which I'd never noticed before, being at the bottom. Am I a member of the Illuminati now?
Illuminated, possibly I should also note that my silicone gaskets haven't gone in the bin, I clearly have a different problem with that side as I struggled to get either cork or silicone to seal. I am off for a drive tonight, hopefully I don't get a leak. I might need to source a decent OEM rocker cover, it could be mine is in poor repair and that's why it won't seal. All I can conclude, from my efforts, proven by the hot water test, is that the silicone gaskets do expand with heat.
just too add my pfennig. I tried a pair of silicone gaskets (presumably from the same source) on my Type 1, which also had taller alloy rocker covers fitted. Up until this point I'd been using these covers with cork gaskets with no issues. I figured the silicone wouldn't compress the same as cork and glued the gaskets into the covers with decent quality sealant. Leaked like a sieve after about 40 miles. When I took the rh cover off, the gasket had swelled up so much that it wouldn't physically fit. Ended up cutting a 15mm section out to shorten it, as a get-you-home. The lh gasket has done exactly the same. My conclusion: silicone isn't suited to seal this particular joint. On a joint with a channel I'm sure it would be fine. Short answer...don't waste your money.
I think, and I am placing a strong emphasis on the work think here, as I haven't run the experiment, that if you have a Type 4 and you use a decent glue, then the combination of the two factors means the gaskets work fine, probably they just swell up and push against the outer face of the lip of the rocker cover. I am certain the C&C one's I bought don't have any secret sauce, they swell up too, just like others have reported here with their purchases. I wonder what effect these gaskets have on VWs design, discussed earlier in the thread, to let out excess oil pressure?
Silicon rocker gaskets - a failed solution looking for a problem that doesn't exist. I've also noticed that silicon pipes turn to jelly with a bit of heat not to mention a bit of oil and silicon products are as slippery as eels. Why would anyone fit anything like this anywhere?
Because you can get it in Blue and Red and Green and Black and יפו it goes well with fart cans and ram air induction cones on your Nissan Micra, thats still as slow on the A43 off the lights as my bus.. .
And I always start off doing the tappets with moving the bale the wrong way and then have to heave it back onto the cover and then off the correct way, and my bales are very tight.
