Balance Shaft Timing
Evolving Member
Joined: Aug 2009
Posts: 143
Likes: 1
From: SF Bay Area
You paid for the timing belt job, they should do it right. Print this quote and show it to them.
I don't know if there's a modern version for the EVO, but here's the DSM guide to changing the timing belt.
http://vfaq.com/mods/timingbelt-2G.html
The quickest way to test this is to pull out a bolt that's hidden behind the turbo and insert a screwdriver into the bolt hole to check for the position of the balance shaft. The crank and cam gear timing marks also need to be lined up first.
The front balance shaft is not connected to the oil pump sprocket. The oil pump sprocket drives one of the oil pump gears, the other oil pump gear is attached to the balance shaft, and the gears let the balance shaft spin at 2/3 speed, so the balance shaft is in the correct postion once every 3 rotations of the oil pump sprocket.
http://vfaq.com/mods/timingbelt-2G.html
The quickest way to test this is to pull out a bolt that's hidden behind the turbo and insert a screwdriver into the bolt hole to check for the position of the balance shaft. The crank and cam gear timing marks also need to be lined up first.
Newbie
Joined: Mar 2010
Posts: 28
Likes: 0
From: MN
I have the car at TDC and I have the DP removed. I think I can yank that bolt without removing the turbo oil drain tube. The problem is I just gave the car an oil change so.... Will oil come out of that hole if I remove the bolt?
Newbie
Joined: Mar 2010
Posts: 28
Likes: 0
From: MN
So I had to use an open end wrench to back out the bolt because nothing else fit between the O2 housing and the plug but after 15 minutes of tinkering I removed the bolt. As said above no oil came out of the hole. I ended up using a ball point pen to check the shaft position.
When inserting the pen it would only go in 1". This is less than half of the 2.4" it should be so this SOB is out of phase!!! Crap!!!
When inserting the pen it would only go in 1". This is less than half of the 2.4" it should be so this SOB is out of phase!!! Crap!!!
Evolving Member
Joined: Aug 2009
Posts: 143
Likes: 1
From: SF Bay Area
To fix it you have to partially undo the timing belt. You can zip tie the belt to the cam gears since that's the trickiest part of a timing belt job, but the belt needs to be loose enough so you can rotate the oil pump sprocket.
Sorry but I just wanted to clarify this. So to get the balance shaft back in phase you do both of these? Rotating the sproket a full turn is what spins the shaft back into phase?
Here ya go.
"NOTE that there is an easier way to do this. Simply rotate the mark on the oil pump sprocket until it is pointing straight up, and let it go. If the sprocket rotates towards (counterclockwise) the timing mark on the engine, the oil pump sprocket is aligned correctly. If it rotates away (clockwise) from the mark, spin the sprocket a full turn and test again, and it should properly rotate towards the mark now. Now line the mark on the sprocket back up with the mark on the engine. This avoids having to remove the rear access bolt entirely.
Caution: MAKE SURE THE BALANCE SHAFT IS PROPERLY POSITIONED. It is possible for the oil pump sprocket timing marks to be properly aligned, and have the balance shaft out of phase. This could result in a SEVERE engine vibration. "
Travis
"NOTE that there is an easier way to do this. Simply rotate the mark on the oil pump sprocket until it is pointing straight up, and let it go. If the sprocket rotates towards (counterclockwise) the timing mark on the engine, the oil pump sprocket is aligned correctly. If it rotates away (clockwise) from the mark, spin the sprocket a full turn and test again, and it should properly rotate towards the mark now. Now line the mark on the sprocket back up with the mark on the engine. This avoids having to remove the rear access bolt entirely.
Caution: MAKE SURE THE BALANCE SHAFT IS PROPERLY POSITIONED. It is possible for the oil pump sprocket timing marks to be properly aligned, and have the balance shaft out of phase. This could result in a SEVERE engine vibration. "
Travis
bringing this to the top, i just recently did a rebuild and am having very very low oil pressure... would this cause low pressure also? I will be checking it tomorrow but just curious till then seeings how i have put new oil pump, oil filter housing im running out of ideas
Evolved Member
Joined: Jun 2006
Posts: 6,902
Likes: 151
From: Grand Island, NE
bringing this to the top, i just recently did a rebuild and am having very very low oil pressure... would this cause low pressure also? I will be checking it tomorrow but just curious till then seeings how i have put new oil pump, oil filter housing im running out of ideas
Last edited by barneyb; Aug 21, 2011 at 09:20 PM.
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