Cam Position Sensor...uh..position?

[Speedbump]

Is the cam positioning sensor on the right, in the correct position?

It seems to “like” the current position, which may be hard to see, but the flag is toward the bottom.( not the orange thing man.. the raised part that goes through the sensor )

But it could also be installed 180’ the other way, correct? Just checking.

I had a scratch pad during tear down with some notes but didn't foresee this

Extra info:

1998 S70 /NA / B52542s s70 .

Valves done, head back on. Timing belt not on yet.

Engine is in time,

Crank is in timing mark.

Cam gears on their timing mark.

Cylinder #1 piston position is full high

Rear cam position “slots “ are horizontal with engine plane.

Rotor is pointing to what would be cylinder #1’s fire position

[erikv11]

This isn't going to change how you set up anything but just FYI:

When the crank is on the timing mark, cylinder #1 piston is high but is NOT all the way up. That is, it is not really TDC.

With the crank on the timing mark, the #1 piston is either just before or just after TDC, I don't remember which, but there is a reason for having the piston not all the way up. None of the pistons are all the way up: that way, you can rotate the cams without the valves hitting the pistons.

[Speedbump]

This isn't going to change how you set up anything but just FYI:

When the crank is on the timing mark, cylinder #1 piston is high but is NOT all the way up. That is, it is not really TDC.

With the crank on the timing mark, the #1 piston is either just before or just after TDC, I don't remember which, but there is a reason for having the piston not all the way up. None of the pistons are all the way up: that way, you can rotate the cams without the valves hitting the pistons.

I noticed when placing the cam cover, ( on time) cylinder #3's Cam Lobs were engaging. The piston for that port was recessed . Review below. I'm getting contradictory info here.

[sconeman]

the cam position sensor cannot be installed wrong. The slot in the cam is offset, no way to put on 180 wrong

[Speedbump]

the cam position sensor cannot be installed wrong. The slot in the cam is offset, no way to put on 180 wrong

Thanks Sconeman !!!!

[Speedbump]

Via SwedeSpeed :

On the B5452 engine the timing marks are not at all the same as the 850 used for example/reference.

Can someone tell me if I am interpreting what I see correctly.

Observation:

On the crankshaft - there is not a notch in the valley - there are two teeth that have a small v notch cut into

them on the back edge - wide end of the v toward the block - point of the v toward the crank pulley.

Interpretation:

The valley between these is the gear locator

Observation:

On the engine block - just above the crank shaft- and slightly to the left there is a slight bulge - on this bulge is

a vertical mark -casting mark - perpendicular to the crank shaft.

Interpretation:

This is mark to line up the gear locator to.

Observation:

On the cam gears there is a vertical scribe line - approximately 2mm long on the outer edge of the gear face. On the opposite side of this mark is an M.

Interpretation:

the vertical scribe is the cam gear indicator marks.

Observation:

When the crankshaft gear is aligned to the block mark then both cam gear marks are on the top of the gear.

Interpretation:

This is the alignment point to start the belt replacement procedure on the B5254.

Observation:

On the top cam gear cover there are two notches on the underside of the cover that match this straight up cam gear alignment.

Intrepretation:

Alignment reference point - the lines on the cam gears should line up to these

[sconeman]

correct on all counts

[Rsterns]

Observation:

On the crankshaft - there is not a notch in the valley - there are two teeth that have a small v notch cut into

them on the back edge - wide end of the v toward the block - point of the v toward the crank pulley.

Yep, like this...

[Speedbump]

correct on all counts

Yep, like this

Thanks Rsterns !! I was beginning to think I was the only one with timing marks this way.

Thanks Skoneman !! That clip was off of SS and is exactly what I'm seeing. The only thing I don't like is he says ::

When the crankshaft gear is aligned to the block mark then both cam gear marks are on the top of the gear.

Sounds like he's doing setting B below. I have my cams set for setting A. I am using the V notches under the Timing cover, not the Top notches. Sound good? That should be the last question. This blasted cover has the notch options to do both.

[the commissar!]

My 98 cams line up like "A" with the crank as pictured above then continue like that...I wonder what cars have the other "B" style cover...I've never seen one but I've only worked on 98 and older cars. Do not attempt to switch from one to the other ie "A" to "B", they are not interchangeable. And it is correct that the cam position sensor will only go on one way, the correct way.

[Volvo5.0]

I wonder what cars have the other "B" style cover...I've never seen one but I've only worked on 98 and older cars.

'99 and later has "B" style cover

[Speedbump]

My 98 cams line up like "A" with the crank as pictured above then continue like that...I wonder what cars have the other "B" style cover...I've never seen one but I've only worked on 98 and older cars. Do not attempt to switch from one to the other ie "A" to "B", they are not interchangeable. And it is correct that the cam position sensor will only go on one way, the correct way.

Yes Cam Position sensor was verified, only one way. So now I have the engine together and was going to get the timing belt on, and there was someone's other input here about my setup considering timing. So I stopped and I'm rechecking before I ram another set of valves.

No I would not switch from a working timing setup to another. The TB tensioner failed while driving so I have no point of reference. Hell knows how it was set up originally. But it looks like I'm good to go ( I am already set up as illustration A ) Crank position verified as well.

[Speedbump]

'99 and later has "B" style cover

Yes I am 98 but I likely have an (unknown year) replacement cover. Just because it has top setting notches doesn't mean move the timing to them LOL. I just need to know what the engine wants, and it sounds like 2 o'Clock / 10 o'clock deal will be the way to go.

[erikv11]

for the B5254 it is A type, only.

Everything reads fine except the end part, sounds like you are timing a 99. So where you said:

Observation:

When the crankshaft gear is aligned to the block mark then both cam gear marks are on the top of the gear.

I think it should say something like

Observation:

When the crankshaft gear is aligned to the block mark then the exhaust cam gear mark is near 2 o'clock, and the intake came gear mark is near 10 o'clock..

Similarly

Observation:

On the top cam gear cover there are two notches on the underside of the cover that match this straight up cam gear alignment.

should be

Observation:

On the top cam gear cover there are two notches on the underside of the cover that match this 2 o'clock and 10 o'clock cam gear alignment.

[Speedbump]

for the B5254 it is A type, only.

Everything reads fine except the end part, sounds like you are timing a 99. So where you said:

Observation:

When the crankshaft gear is aligned to the block mark then both cam gear marks are on the top of the gear.

I think it should say something like

Observation:

When the crankshaft gear is aligned to the block mark then the exhaust cam gear mark is near 2 o'clock, and the intake came gear mark is near 10 o'clock..

Similarly

Observation:

On the top cam gear cover there are two notches on the underside of the cover that match this straight up cam gear alignment.

should be

Observation:

On the top cam gear cover there are two notches on the underside of the cover that match this 2 o'clock and 10 o'clock cam gear alignment.

That was a quote from SS, not my words. But I didn't like that last part, bringing the second question to the table, posting the cam cover illustration. I was at 2/10 o'clock.

Note however, this does bring the piston in cyl # almost fully up;.

It puts cylinder 1's piston at top position.

EDIT: When the crank is on the timing mark, cylinder #1 piston is high but is NOT all the way up. That is, it is not really TDC. With the crank on the timing mark, the #1 piston is either just before or just after TDC, I don't remember which, but there is a reason for having the piston not all the way up. None of the pistons are all the way up: that way, you can rotate the cams without the valves hitting the pistons.

So note then, that on the 1998 s70 B5254 / NA the notches are on the teeth of the crank, not the valley in between. The crank mark indicates #1 TDC, or at least,very close to it. So the above statement will not apply. Although it likely will on other models. On the 2.4 s70 therefore, with crank at TDC, rotating the cams 360' will likely cause damage. The crank should be set to the notches with the head off, and the valve cover cams set on proper time and held with the cam holders before reinstall. You will have plenty of play for fine cam timing adjustment.

I really appreciated everyone jumping in to help confirm. Never hurts to look twice. But check the pictures, the agreed consensus by all, including you, does put cyl #1's piston in the illustrated position.

Engine is in time,

Crank is in timing mark.

Cam gears on their timing mark.

Cylinder #1 piston position is full high

Rear cam position “slots “ are horizontal with engine plane.

Rotor is pointing to what would be cylinder #1’s fire position