"Kirk S." > wrote in message
...
> Tony,
>
> Thanks for the advice. With each cylinder firing 144 degrees from each
> other, I can't see how all lobes of the camshaft can all be on low spots
at
> the same time. At that position, none of the lobes are openning the
valves
> very far. I did line up the 0 mark on the crankshaft and the mark on the
> back of the cam pulley with the top of the valve cover gasket before I
> started. I reversed the removal procedure and installed 1&3 first and 2&4
> second. Lubed everything up with assembly lube and tightened slowly and
> evenly with a 1/4" ratchet. Once I got everything tightened down evenly,
I
> torqued to 180in/lbs in three steps.
>
> The way the manual described the procedure made no sense to me logically.
> If I remove 2&4 first and 1&3 second, it makes logical sense to put them
> back in reverse order.
>
> Kirk S.
> "Tony" > wrote in message
> ...
> > Sounds like you didn't get it to TDC.
> >
> > The mark that you need to align is on the BACK of the cam pulley. It
lines
> up
> > with the top edge of the valve cover gasket. Of course the cam pulley is
> removed
> > now so not sure how you can check it. At TDC all the lobes should be off
> the
> > lifters.
> >
> > Or your timing belt was off a few teeth before you started.
> >
> > Tony
> > '91 100q 5 spd
> > (fourth T44)
> >
> > Kirk S. wrote:
> > > Hi,
> > >
> > > I'm replacing the lifters on my 86 5000 and am having lots of trouble
> with
> > > the camshaft bearing caps. If I follow the manual, there is no way
that
> I
> > > can put the caps back on. The procedure as I understand it is as
> follows:
> > >
> > > a) place engine at TDC; marks on camshaft pulley and crankshaft
> > > b) loosen caps 2 & 4 diagonally
> > > c) remove caps 2 & 4
> > > d) loosen caps 1 & 3 diagonally
> > > e) remove caps 1 & 3
> > >
> > > The manual calls for reinstalling in the same order. The problem is
> that
> > > there is no way to install cap 4 with the lobes pushing on the
lifters.
> > >
> > > What am I doing wrong? Should I install in the reverse order? That
> would
> > > make sense to me.
> > >
> > > Thanks in advance!
> > >
> > > Kirk S.
> > >
> > >

No matter where you set the camshaft, there is no way of avoiding pressing
down on some of the valves as you tighten down the camshaft. The idea of
removing/tightening alternate caps is to minimise the bending stress in the
camshaft itself. If you tighten down the outers (1&4) first, you risk
permanently bowing the camshaft upwards in the middle. Similarly, if you
tighten down the inners (2&3) first, you risk bowing it the other way. It is
less important which pair (1&3 and 2&4) you loosen/tighten first, as long as
you avoid making the camshaft span too far as a beam between supports. A
bent camshaft will obviously bind in the bearings, leading to premature
bearing wear and failure of the toothed belt. Hope that makes sense!

Rachael