Timing double check

[shomike220]

Somebody please double check me on this. I am doing a mtx swap I used the 3.2 heads for now. I swapped over all the 3.0 timing parts except cam gears. I out the belt on and used the 3.0 marks. I spun the motor over twice and my cam gear dots are lined up good with the rear upper cover and my crank dimple is aligned with the oil pump bump. The only reason I am second guessing myself is because it seemed like I had to turn the motor back to use the 3.0 mark on the belt. This makes me feel like its one tooth off from where the belt was with the 3.2 timing parts. I even took a pic when I pulled it apart with my cam gears ligned up up top it seemed like the crank dimple was on tooth forward (closer to crank centerline) than it is now.

 

[Irish Pride]

3.0 oil pump or 3.2 oil pump? If you still have the 3.2 oil pump and are setting it up for the 3.0 timing then the mark will be one tooth off at the crank sprocket.

 

[LOUDSHO92]

You need the 3.0 heads unless you plan to modify them for the 3.0 accessories.

 

[shomike220]

I am running the 3.2 oil pump. So I need to move it forward to where I though it should be then it seems.

 

[shomike220]

You need the 3.0 heads unless you plan to modify them for the 3.0 accessories.

As far as cutting a chunk off for the alternator I'm ok with that for now. I hope to freshen up a set of 3.0 heads I have and mabye find some cams after I get it back together.

 

[Irish Pride]

The 3.2 line on the belt should line up with the notch on the oil pump but you want the dimple on the sprocket lined up with the 3.0 mark.

 

[rubydist]

The 3.2 line on the belt should line up with the notch on the oil pump but you want the dimple on the sprocket lined up with the 3.0 mark.

The above is confusing at best, misleading at worst.

The crank orientation is the same on the 3.0 as 3.2 when the timing belt is installed correctly and the cams are aligned with the marks on the timing cover.

The reason that you need one more tooth of belt length on the 3.2 assembly to get that orientation correct is because the 3.2 belt runs around an idler on the tight (front) side of the belt, so you need a longer belt to cover the (longer) distance.

So, to the op, if you have the cam sprocket marks aligned with the timing cover, and the crank sprocket mark aligned with the bump on the oil pump, then you have the belt installed correctly. End of story.

 

[Irish Pride]

The above is confusing at best, misleading at worst.

The crank orientation is the same on the 3.0 as 3.2 when the timing belt is installed correctly and the cams are aligned with the marks on the timing cover.

The reason that you need one more tooth of belt length on the 3.2 assembly to get that orientation correct is because the 3.2 belt runs around an idler on the tight (front) side of the belt, so you need a longer belt to cover the (longer) distance.

So, to the op, if you have the cam sprocket marks aligned with the timing cover, and the crank sprocket mark aligned with the bump on the oil pump, then you have the belt installed correctly. End of story.

Longer belt? Its the same belt for 3.0 and 3.2. 155 teeth on both. There are 2 separate marks to line the belt up with. One for 3.0 and one for 3.2. The timing marks differ enough to make a one tooth difference.

 

[shomike220]

I think he ment one more tooth as to why it uses the 3.0 line. My cams and crank marks are aligned I think I'm good I have a 3.0 oil pump I storage I will verify the timing bumps tomorrow just for curiosity.

 

[Irish Pride]

Just make sure all the marks line up with the 3.0 line on the belt. Should be good to go. Once you rotate it a few times and tighten the tensioner I don't believe the crank sprocket lines up with the oil pump anymore.

 

[rubydist]

Longer belt? Its the same belt for 3.0 and 3.2. 155 teeth on both. There are 2 separate marks to line the belt up with. One for 3.0 and one for 3.2. The timing marks differ enough to make a one tooth difference.

It takes more belt length on the tight side of the belt (front of the car) on the 3.2 because the timing belt on the 3.2 goes around that idler that is not there on the 3.0. Therefore, the alignment mark on the 3.2 accounts for that longer required belt length between the crank sprocket and the front cam sprocket.

The crank orientation is identical on the engine at TDC, regardless of if it is a 3.0 or 3.2

Therefore, the mark in the crank sprocket must align with the bump on the oil pump regardless of which engine, which accessories, or which oil pump is installed.

 

[rubydist]

Just make sure all the marks line up with the 3.0 line on the belt. Should be good to go. Once you rotate it a few times and tighten the tensioner I don't believe the crank sprocket lines up with the oil pump anymore.

This is also misleading - every single time the cam sprocket marks align with the marks on the timing cover, the crank sprocket mark lines up with the bump on the oil pump. That is required for the engine to have the cams properly timed.

However, the timing marks on the belt only align once in a while, because of the combinations of the number of teeth on the belt and the number of teeth on the sprockets, the timing marks move around.