Rocker assy
Rocker assy
Author
Discussion

WokingWedger

Original Poster:

1,030 posts

236 months

Tuesday 23rd November 2010
quotequote all
Are the rocker shafts handed ( LH & RH) ?

When assembled up with rockers are they handed ?

Is it possible to swap LH with RH in an attempt to improve pre-load ?

All questions going through my head.

I am out work at the moment but still thinking about checking the pre-loads. I have only got so far, but it is starting to appear one bank has more pre-load than the other, and maybe when the garage did the head gaskets they swaped them over. (neither have any shims fitted)

Any thoughts gratefully received to try and reduce the ticking I now have since the head gasket change. (Cam, followers and rockers all renewed prior to head gasket change with no ticking.)

Colin RedGriff

2,541 posts

288 months

Tuesday 23rd November 2010
quotequote all
The shafts aren't handed, but I wouldn't swap them around unless you are talking about brand new shafts. They will most likely have some wear on them if they've been in the car for a while.

There are two rockers part numbers - one for the inlets and one for the outlets but they are the same from one side of the engine to the other.

I think when assmbled they can be swapped from one side of the engine to the other, again whether you want to do this with used components is doubtful.

You can buy packs of shims to adjust the preload easily enough.

If you've had the head gaskets changed recently it might be they need a bit of time to compress down a bit? Not sure on the RV8 if you should retighen the headbolts after a few 1000 miles or not.

spend

12,581 posts

282 months

Tuesday 23rd November 2010
quotequote all
Did the garage skim the heads by any chance?

If it is an imbalance between banks sounds like they may have taken more off one head than the other?

v8 racing

2,064 posts

282 months

Tuesday 23rd November 2010
quotequote all
the rockers aren't sided from bank to bank, but are inlet to exhaust as mentioned earlier, there are also differnt thickness of head gaskets on the market? if you have generally got more pre load on one bank to another there is a fault, if the garage is competent and have matched the combustions to suit so the c/r is the same it wont be a problem, but if you are running 10-1 on one bank and say 9-5
on another you are going to be in trouble, i would contact the garage for more info on what they have done.