juntjoo
10+ Year Contributor
- 780
- 1
- Sep 12, 2011
-
fort myers,
Florida
I'm replacing my timing belt and doing a BSE for the first time and I noticed a couple alarming things:
1) the cam sprockets are off a tooth when lined up in the middle with exhaust at 3 o'clock and intake at 9 o'clock. Check the pic for reference.
Does this mean the belt was put on wrong or the belt got stretched over or something? what kind of ramifications would this cause the cam shafts' functionality? Could the problem be that the sprockets are just misaligned to the cam shafts and that they could still be in synch with each other and the crankshaft/pistions?
2) Cranking the crank shaft over well over six times I was never able to get all the cam, crank, and oil pump sprockets to line up with their respective timing marks. The crank and cam shafts would line up every four rotations of the crank shaft, while the oil pump sprocket would line up with the crank shaft every six rotations, but always one rotation away from the cam shaft marks lining up. I'm sure I've located the timing marks correctly, but just in case I'll include pictures
I wouldn't know how to tell when the 1st piston, which I assume would be the closest one to me, would be at TDC, so I'll point out that the pointy end of the exhaust cams are pointed straight up (2nd-to the right, 3rd-to the left, and 4th-straight down). Not that the cams would necessarily indicate the position of the pistons, but I'll assume they are close enough in synch since the car ran decent enough before the timing belt broke, luckily only partially giving me warning to stop the car. But aside from some stuttering of the engine during idle it ran alright. Idled kinda high for about ten minutes too long after starting the car and seemed to have only about 15 mile per gallon fuel economy. I hope some if not all of these issues have to do with these timing mark problems to I can fix em.
Well since I'm doing a BSE I guess I don't need to worry about lining up the oil pump sprocket right? And I what do I do about the cam timing marks misaligned? How do I check the timing between both cams regardless of where the timing marks are? I could really use some experienced help on this one. Thanks
1) the cam sprockets are off a tooth when lined up in the middle with exhaust at 3 o'clock and intake at 9 o'clock. Check the pic for reference.
Does this mean the belt was put on wrong or the belt got stretched over or something? what kind of ramifications would this cause the cam shafts' functionality? Could the problem be that the sprockets are just misaligned to the cam shafts and that they could still be in synch with each other and the crankshaft/pistions?
2) Cranking the crank shaft over well over six times I was never able to get all the cam, crank, and oil pump sprockets to line up with their respective timing marks. The crank and cam shafts would line up every four rotations of the crank shaft, while the oil pump sprocket would line up with the crank shaft every six rotations, but always one rotation away from the cam shaft marks lining up. I'm sure I've located the timing marks correctly, but just in case I'll include pictures
I wouldn't know how to tell when the 1st piston, which I assume would be the closest one to me, would be at TDC, so I'll point out that the pointy end of the exhaust cams are pointed straight up (2nd-to the right, 3rd-to the left, and 4th-straight down). Not that the cams would necessarily indicate the position of the pistons, but I'll assume they are close enough in synch since the car ran decent enough before the timing belt broke, luckily only partially giving me warning to stop the car. But aside from some stuttering of the engine during idle it ran alright. Idled kinda high for about ten minutes too long after starting the car and seemed to have only about 15 mile per gallon fuel economy. I hope some if not all of these issues have to do with these timing mark problems to I can fix em.
Well since I'm doing a BSE I guess I don't need to worry about lining up the oil pump sprocket right? And I what do I do about the cam timing marks misaligned? How do I check the timing between both cams regardless of where the timing marks are? I could really use some experienced help on this one. Thanks
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