Hi,I have just put a set of yella terra roller rockers on my 186. What is the best rocker cover to use? Thanks
Keep the original rocker cover and fit a spacer underneath it: http://www.aussiespe...
I had no end of trouble with oil being picked up through the PCV with an unbaffled aftermarket rocker cover.
I've got YT roller rockers with one of these spacers and an original rocker cover and no more oil problems.
I fitted it with some 1" (25mm) x 1/4UNC alley key grub screws in the head with nuts on them.
With the spacer, you are going gasket, spacer, gasket, rocker cover. It is so much easier just dropping everything onto the grub screws.
Any good nut and bolt shop should charge less than $5 for the grub screws and nuts.
Old is good.
hi. i would like to keep original but the rockers seem to hit on the side of the cover where it dips in around where you bolt it down, will a spacer fix this? i can't even get all the holes on the cover to line up. thanks
Are you sure they are YT rockers?
There are cheap, pretty looking anodised (blue, red) roller rockers out there with large, squared -off heads. I bought a set once and they hit as you describe.
YT rockers are narrower with rounded ends.
Those spacers also come in 8 and 10mm. Mine is 8mm.
hi, yes they are YT5030 on a yella terra head. they do have a big squared pushrod end. on closer inspection it looks more like they are hitting on the corners, front left of number 1, back left of number 12. thanks
you could get two rocker covers cut the bottom off one and the top off the other weld them together at the height you would like and keep the original look
Beatings will continue until moral improves
I have done this and many years ago to fit in a stud girdle and roller rockers and wouldn't recommend it !. The rocker covers are very thin and warp very easily when welding and it required a fair bit of plastic filler ( BOG ) to make it look any good . I had no other choice as neither a spacer , aftermarket chrome cover or aftermarket alloy cover would clear a double bar stud girdle . Either go with the spacer and stock cover or an alloy aftermarket cover and weld in your own baffle . Pic is of cover in a crappy hz just to confuse people as it was fairly tall but was off my race car originally :)
hi, thanks for the input. i understand the height issue and using a spacer sounds like the best option, however, my roller rockers seem to touch the inside of the cover where it dips in for the rocker cover bolts(pushrod side).at the moment i can't move the rocker cover over to the manifold side enough for the holes to line up. Has anyone had this trouble? will a spacer fix this?
I had a tall aftermarket cover that cleared the YT rockers but it had no baffle.
My old Thomas ally cover hit as you described.
I would ring YT and ask them if your rockers will clear a standard Holden rocker cover with a spacer under it. I think it might.
Hi, yes they are yt5030.
these were available from all good speed shops in days gone by, so there must be second hand ones still around. The alloy ones are some times designed to accommodate rollers/girdles. These can be purchased new.Or use the spacer plate as David has suggested.
ive had this on for years clears everything
i'd rather be blown than injected
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