I've got my new timing belt on and was ready to set tension when I realized the FSM and Haynes procedures are different. Came back to consult Z31P and found good info... but still wanted to post this up as a way of confirming my thinking... yeah, I'm a bit anal about getting it right. I've seen the pictures on Xenon's website and I don't want my engine to look like that...
I've got the rocker covers off because I also replaced valve stem seals. I reinstalled the lifters and have tightened rockers to check for interference. Everything seems good, but based on FSM, I need to loosen them again to set belt tension without valve spring tension applied to it. I've read a thread that went into detail about how wrong Haynes is, so I just intend to stick to FSM. I suppose if I had understood the tensioning procedure better, I would've just set it before testing for interference... oh well, that's 24 bolts I get to loosen and retighten. Won't be the last time...
Just a couple of thoughts and/or questions...
Assume I don't need to go back to TDC before loosening the rockers. It's not that difficult to do, but I see nothing special about that position as long as the timing belt stays on (which is pretty much required if I'm going to set tension.... lulz).
The Haynes procedure has you rotate the crankshaft by hand and set tension with the rockers tightened and the spark plugs installed, which were both red flags to me. Haynes also states a specification for belt tension which I find no where in the FSM.
The FSM actually duplicates the belt tensioning procedure - it's in both the MA section and the EM section. Both are consistent (whew!).
Not trying to draw out the "pro-Haynes vs. anti-Haynes" debate, just wanted to put this out for clarification and future reference to others newbs who, like me, want to get it right the first time.
Any pros out there who want to add to what I've said?
I've got the rocker covers off because I also replaced valve stem seals. I reinstalled the lifters and have tightened rockers to check for interference. Everything seems good, but based on FSM, I need to loosen them again to set belt tension without valve spring tension applied to it. I've read a thread that went into detail about how wrong Haynes is, so I just intend to stick to FSM. I suppose if I had understood the tensioning procedure better, I would've just set it before testing for interference... oh well, that's 24 bolts I get to loosen and retighten. Won't be the last time...
Just a couple of thoughts and/or questions...
Assume I don't need to go back to TDC before loosening the rockers. It's not that difficult to do, but I see nothing special about that position as long as the timing belt stays on (which is pretty much required if I'm going to set tension.... lulz).
The Haynes procedure has you rotate the crankshaft by hand and set tension with the rockers tightened and the spark plugs installed, which were both red flags to me. Haynes also states a specification for belt tension which I find no where in the FSM.
The FSM actually duplicates the belt tensioning procedure - it's in both the MA section and the EM section. Both are consistent (whew!).
Not trying to draw out the "pro-Haynes vs. anti-Haynes" debate, just wanted to put this out for clarification and future reference to others newbs who, like me, want to get it right the first time.
Any pros out there who want to add to what I've said?
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