How to set Valve clearence in Mitsubish Lance 1987 Engin model G15B

no 1 piston tdc
the cam lobes for no 1 piston should in such a position so that a slight turn of the cam shaft one way makes the exhaust start to close and the inlet start to open or the other way the inlet start to close and the exhaust start to open
this is known as valve rock or valve overlap and occurs when the cam shaft is properly timed to the tdc position of the piston
for a twin cam engine the cam lobes position will be the same operation just that the inlet cam rock will be for the inlet cam and the exhaust cam rock will be for the exhaust cam

firing order is 1-2-3
so when no 2 cylinder valves are in the rock position ( exhaust closing at the same time as inlet is opening) that will be no 1 piston tdc compression stroke adjust the both valves to the specification
.006" both valves
when no3 piston has valve rock adjust no 2 cylinder valves
when no 1 has valve rock adjust no 3 cylinder valves
go google and type in valve clearance of deutz 3 cylinder engine
there is another method explained where inlet of one cylinder and exhaust
this is done with one full revolution of the crank
www.deutzamericas.com page 42 of the manual

there is a method but you will have to have an understanding of valve timing
in an engine regardless of number of pistons when number 1 piston is TDC not firing, then the exhaust valve will be open and ready to close and the inlet valve will be closed and ready to open
so bring the piston up and near tdc
as you approach tdc you will see the exhaust start to close and at the same time the inlet valve will start to open
if you rock the crank back and forward slightly at tdc you will see that the valves are rocking
this is valve rock and indicates the cam is in time with the crank
it is only necessary to do it with no 1 piston
It doesn't matter how many cam shafts ( one cam shaft can be inlet valves only and the other can be exhaust valves only) there are, it is the exhaust and inlet valves for no 1 piston that you are looking at
how do you get tdc-- remove a plug and with a piece of wire place the end on the piston crown and as the piston comes up the wire will be pushed out as you rock the piston the wire will move in and out and the point before movement is tdc
probably as clear as mud unless you are engine savvy

take no 1 plug out and watch the rockers for no 1 piston when the rockers are both on the back of the cam , ( valve clearance ) place a piece of wire in the plug hole to touch the top of the piston and as you carefully move the piston towards tdc the wire will move out until you get to a point where it starts to move back in
At the point where the wire moves out or in as you rock the crank at that point the TDC marks should be lining up
That is tdc no1 piston firing
also look at the other rockers and see which one is moving up (exhaust) and the other down (inlet) and that is the next piston to fire

there does not need to be marks on a harmonic balancer to adjust valves
when a piston is on tdc the valves will be either completely closed or in the valve rock position
when adjusting valve clearence you will need to know the firing order because when no 1 piston is ready to fire , then the next piston to fire will be in the valve rock position
for example if no1 piston of a 6 cylinder ( firing order 153642) is at tdc firing both valves will be closed and so the valves of no5 piston will be rocking so that will be the nect piston valves to adjust and after that no3 piston valves will rock so you do no 5 valves and so on
a workshop manual will explain it all to you

It depends on which TDC you are talking about, compression TDC or exhaust TDC. On the compression stroke, no valves will open after TDC-this is when combustion has occured, the power stroke. When the piston reaches bottom and starts up on the exhaust stroke, then exhaust valve will open. At TDC of exhaust stroke, exhaust valve will be closed, and the intake valve will then open as piston is moving down.
If you have the intake valve opening right after TDC, you are on the exhaust stroke of that cylinder. The exhaust valve is only open during upward movement of the piston on the exhaust stroke. Immediately after TDC of exhaust stroke, the intake will open as the piston travels downward.

hi son pf spud. Have the compression checked. You may have bent the valves Regards John

With engine Crankshaft on TDC and cam timing set correctly this is the position where No. 1 cylinder is firing at the start of the power stroke. At this point No. 4 cylinder is also at TDC but is just at the end of the exhaust stroke and starting the intake stroke so the exhaust valve will be almost finished closing and the inlet valve will just be starting to open. This is referred to as the inlet and exhaust valves rocking.

Hi, to set the timing you should turn the No.1 piston to TDC, then turn the cam to where both valves on No.1 are close. The timing mark on the sproket should now be in line with the mark on the cilinder head. With No. 1 still on TDC fit the chain.
After fitting turn the engin a few times by hand to make sure there's not a valve pushing against a piston.

To set the timing you should turn the No.1 piston to TDC, then turn the cam to where both valves on No.1 are close. The timing mark on the sproket should now be in line with the mark on the cilinder head. With No. 1 still on TDC fit the chain.
After fitting turn the engin a few times by hand to make sure there's not a valve pushing against a piston.