why are these pistons sitting like this??
02-06-2005, 11:54 PM
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why are these pistons sitting like this??
shouldn't they NOT sit the same on all cylinder? shouldn't cylinder 1 & 4 would be up while 2 & 3 be down? but these all sit the same. 
02-07-2005, 12:00 AM
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Re: why are these pistons sitting like this?? (1.8)
When the crank rotates it will sed 2 up and 2 down... at some point in every rotation they all meet up just like that... u just happened to pull the head when they were even.
02-07-2005, 12:03 AM
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Re: why are these pistons sitting like this?? (nub.96ek)
so if i turn the crank counter clockwise right now, it'll be normal? noob question but safe to do it without head on, right?
so when i put on the head, just make sure it's on TDC?
so when i put on the head, just make sure it's on TDC?
02-07-2005, 02:15 AM
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before you put on the head, set the crankshaft to Cylinder #1 TDC which will put the pistons on both ends at the top. Put the camshafts in the head both at the Cylinder #1 TDC setting also... when rotating the cams pay attention not to let any of the intake valves hit any open exhaust valves and vice versa. After you bolt on the head double check everything is set to TDC then install the timing belt and tensioner. Before running the engine rotate the engine counter-clockwise by turning the crank pulley 3-4 times around and stop with at TDC again and make sure everything lines up still. If so, you did it right.
02-07-2005, 11:09 AM
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Re: (mister2racer)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mister2racer »</TD></TR><TR><TD CLASS="quote">Put the camshafts in the head both at the Cylinder #1 TDC setting also... when rotating the cams pay attention not to let any of the intake valves hit any open exhaust valves and vice versa. </TD></TR></TABLE>
how does the intake valves hit any open exhaust valves? when i install the head, i usually just put it on and then put everything on TDC. seems to work for me everytime i do it.
how does the intake valves hit any open exhaust valves? when i install the head, i usually just put it on and then put everything on TDC. seems to work for me everytime i do it.
02-07-2005, 11:29 AM
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Re: (1.8)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.8 »</TD></TR><TR><TD CLASS="quote">
how does the intake valves hit any open exhaust valves? when i install the head, i usually just put it on and then put everything on TDC. seems to work for me everytime i do it. </TD></TR></TABLE>
If you change cams/valves its usually a good idea to check for piston to valve and valve to valve clearance. You'd rather find out by hand-cranking that the valves hit something rather than find out when the engine is running at 3000+ rpms.
Its just something to check.
how does the intake valves hit any open exhaust valves? when i install the head, i usually just put it on and then put everything on TDC. seems to work for me everytime i do it. </TD></TR></TABLE>
If you change cams/valves its usually a good idea to check for piston to valve and valve to valve clearance. You'd rather find out by hand-cranking that the valves hit something rather than find out when the engine is running at 3000+ rpms.
Its just something to check.
02-07-2005, 11:09 PM
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when rotating the cams it will cause the valves to open, this is why i said you should watch to make sure none of them hit one another. if you remove the cams completely then you can just reinstall at TDC and not have to worry about it.
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02-08-2005, 02:40 AM
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Re: (1.8)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.8 »</TD></TR><TR><TD CLASS="quote">
how does the intake valves hit any open exhaust valves? when i install the head, i usually just put it on and then put everything on TDC. seems to work for me everytime i do it. </TD></TR></TABLE>
that can happen becuase you dont have a timing belt on there. If there is no timing belt then you can move the intake cam without moving the exhaust cam or vise versa....get it?
how does the intake valves hit any open exhaust valves? when i install the head, i usually just put it on and then put everything on TDC. seems to work for me everytime i do it. </TD></TR></TABLE>
that can happen becuase you dont have a timing belt on there. If there is no timing belt then you can move the intake cam without moving the exhaust cam or vise versa....get it?
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