timing marks help

[Trans95am208]

I am new to dsm's i am for v8's. so i need some help. I recently spun a rod bearing in my 95 talon and my buddy had a extra engine. i disassembled his engine and went through to make sure everything was gonna work when i start it.

So now i am reassembling his engine it is all complete except the timing. i have a eagle dealer manuel and i followed how it said to align and install the timing belt. but then it says to turn the crank two revolutions and recheck the timing marks. all the timing marks line up except the oil pump mark. so my question is should the oil pump mark line back up or is it not a big deal? i do know that there is a counter balance shaft on the back of it will it make the engine vibrate when i start it?

The engine is a 4g63t
Any input is a thanks i want to get this engine back in by the weekend.

 

[Spdfreak]

you definitly have to realign the oil pump becasue it will vibrate on start up it will seem like a misfire but it will be just out of balance i normaly put the oil pump marks where they should go then run the belt like usual sometimes it takes more than two revolutions to line up due to the different ratios ex cam, crank ,oil pump gears hope that helps some

 

[davidaham]

try 2gnt.com my friend said there is a write up on how to set the timeing

 

[Jafro]

Keep in mind that the oil pump gear is a different size than everything else, and there is some gear reduction occurring inside the oil pump that causes the front balance shaft not to spin at the same speed as the oil pump gear. Every 2 crank rotations will put that oil pump gear mark 120° out-of-phase with the other marks, so every 6 revolutions, they'll all line up again.

BUT!

...the problem remains that you could have the balance shaft either 120 or 240° out-of-phase from where it should be at TDC, even though all the marks line up. There's a 14mm bolt on the front of the block that you can remove and shove a screwdriver through the hole. When the balance shaft is in the correct phase, you'll feel it. Make sure you have all the marks lined up with that scewdriver in the BS hole, or you could end up with some pretty severe engine vibration problems.

The "best" thing from a maintenance perspective is to rid your motor of the shafts. Then it doesn't matter where the oil pump gear is pointing. It's not a quick modification, though. A greasy stinky nightmare to do without pulling the engine.

 

[steve]

The procedure in the manual has been revised several times over the years. There is at least one TBS to update the book. We have a VFAQ that explains the process and it might help you.

Timing Belt VFAQ

 

[Jafro]

Wait... just re-read you post and noticed the engine's not in the car. If you want to eliminate several potential points of failure like seized BS bearings, broken balance shaft belt on interference engine, etc... I've got the balance shaft removal documented for a 6-bolt (same parts/process as a 7-bolt), and also how to set timing on a 7-bolt (again, same process for 6-bolt), watch these videos.

The only thing that isn't clear is how to pull the bearings and block the balance shaft oil holes. You can use the old balance shaft with a hammer, and tap the bearing around the edges until it pops out. Flip the bearings 180° and tap them back in. The stub shaft is from a 4g61 (1.6L dohc), and it's a factory part. The stub shaft part number is in the 6-bolt video, and the front case oil seal part number is in the 7-bolt video. It costs like $25 to do this with the pieces you've got. If you had to replace your oil pump for any reason after removing the shafts, you could just use the front case from a 4g61 since it doesn't have them.



BS Bearing flip @ 1:50 Front case modification @ 4:44-5:33
YouTube - 5. 4g63 Teardown II

Setting 4g63 timing process (no balance shafts). Installing oil seal @ :30 and done setting timing by 1:22.
YouTube - 2009 09 14 GSX Engine Re Assembly

Oil seal part # 3:10
YouTube - 2009 06 14 GSX Engine Removal & Disassembly

 

[Trans95am208]

I did the screw driver in the side of the block to make sure that the counter balance shaft is at the right spot along. it goes in deeper than two inchs so it should be good that way and i turned the engine back two revolutions to where i had orginally lined the timing marks back up. all the timing lines back up so this would mean my timing would be okay???

 

[Jafro]

It sounds to me like you got it right. Measure the gap between the top of the tensioner and the tensioner arm. Make sure you got that in spec and you're golden. Specs are in the GSX re-assembly video. You can nail it without the timing belt tool, but that gap is trial and error until you get it right.