TIMING CHAIN SLACK camshaft rotation

[wangan_cruiser]

as im working on my motor sr, im putting things back after i installed my new oil pump. i turned my camshaft with a ratchet so i can aligned them then it turn then slipped.i put those sprocket with their corresponding mating marks. i unhooked the after i got done. i turn the crankpulley with a ratchet to check for smooth turns. then i heard clicking sound somehere in the head. so i checked it out i kept on turning and turning until i cant find it then i move in the front and turn it more and i found out that my timing chain is slapping on the upper chain guide.


questions

1. is it ok to turn the camshafts by ratchet? if its bad how bad? internal damage?
2. do tensioner goes bad just by removing them 2-3 times?
3. slack for the timing chain i have tensioner in but still have this enough slack. anyone can tell? (PICS)


http://img.photobucket.com/albums/v224/neozmc24/SR20DET/DSC00031.jpg

i know the mating marks are gone because im trying to turn it to get the right timing but apparently i cant coz im stumped on this part that whenever i turn the crank pulley the whole thing slips. anyone ever had this problem?


i searched but i cant find any answers so i decided to post more information for my prob.

[tt99ol]

if you turned the cam or crank with the chain off then you most likely bent a valve but it looks like maybe its time for a new chain or you skipped a tooth when putting it back together

[wangan_cruiser]

can u tell from outside if u got a bent valve?

[gotta240]

Possibly. Search for LEAKDOWN TEST.

[garagelu]

Mine is like that too. At TDC there is a little slack in the chain. Tried changing tensioners and still the same. I havent had any problems with it like that and I have been running it like that for a year or so. When the engine turn the chain should tighten up.

[wangan_cruiser]

is it possible to bend a valve by hand w/ ratchet alone?

[Matej]

Your cams are probably just misaligned.

[wangan_cruiser]

where are the pros at? i want to know what they think about this.

[tt99ol]

yes it is possible to bend a valve with just a ratchet but only if the chain was removed when you spun the cam and only if a piston was close to or at tdc
do a leakdown test if you want to be certain

[GSXRJJordan]

Leakdown test would tell you, but that requires tools. Yes, you could theoretically bend a valve, but you'd really have to put some torque on it. Most likely, you either are off a tooth, or the cam chain tensioner will take up that slack and everything will be ok (if you have your cams set correctly).

You guys do realize that the cam chain tensioner works on oil pressure, right? No oil pressure = cam chain tensioner isn't taking up any slack.

[IRN]

check between the 2 sprocket marks when they are aligned with the chain marks at TDC. from dot to dot, they should be exactly 20 from begining to end. if you counted 20 chain marks then your cams might just be just slightly off. make sure the cam #1 lobes are pointing outwards and all marks line up. you can count the teeth on each sprocket to see if your timing is correct. from the top of the head surface, count how many marks till the sprocket dot. intake should be 5 and exhaust should be 9. they sometimes never get on the dot of 5 and 9 but anything give or take a 1/2 should be fine. refer to this image

http://www-personal.umich.edu/~taesoo/SRHead/CamPulley_resize.bmp

if you did not already, put the chain tensioner on and turn the crank over 2-3 times so the chain can seat properly. the tensioner should fix the slack problem after a few rotations. it takes about 8 rotations i believe before you get everything to line back up (timing marks). the last time i did the timing, I had slight slack on a section of a rotation. the tensioner should click to proper tension after the motor fires up and also the oil pressure helps too.

[wangan_cruiser]

i have a compressor but where can i get a air hose that i can use to plug it in to the spark plug well?

[blueshark123]

i have a compressor but where can i get a air hose that i can use to plug it in to the spark plug well?

u need his tool http://www.toolhawker.com/Cylinder-Leak-Down-Tester_item_35486.html

[wangan_cruiser]

ok thanks. now i need to find one in my area so i can use it asap

[wangan_cruiser]

Leakdown test would tell you, but that requires tools. Yes, you could theoretically bend a valve, but you'd really have to put some torque on it. Most likely, you either are off a tooth, or the cam chain tensioner will take up that slack and everything will be ok (if you have your cams set correctly).

You guys do realize that the cam chain tensioner works on oil pressure, right? No oil pressure = cam chain tensioner isn't taking up any slack.


that make sense to me because my tensioner looks like its dry. but i didnt forced to turn the camshaft.

[IRN]

make sure everything is timed correctly and you should be fine. that slack I had fixed it self after a drive around the block.