little confused please help!

[NathanBerge]

hey! im rebuilding my sr20det and i have all cams,timing chains etc installed but when i spin my crank right before top dead center then chain looses tension then right after re tensions is this normal?

[jedi03]

tensioner needs to be installed...it also uses oil pressure to keep tension. The cam springs are pulling it tighter than the tensioner can hold at that moment

[NathanBerge]

the tensioner is installed. so with oil pressure that should keep tension at all times?