nicknack25

So i had a blown head gasket in my b18a1 engine so i resurfaced a b18b1 head and slapped that in but now my timing belt isn't tightening right. i hand cranked it 6 times, put it to TDC, loosened the tensioner, moved over 3 teeth (even tried moving it 5 and 8 teeth over) , tightened it, hand cranked several times, and checked at TDC but it was still kinda loose. My only guess is that the machine shop shaved off too much. Any help on this?

alex14

You might be able to use a slightly thicker head gasket. I'm no expert though.

nicknack25

Do you think adjustable cam gears would help?

isl_cruiser

sounds like a bad tensioner, or wrong belt. U wont physically notice a loose belt from machining to much off

nicknack25

The belt was nice and tight when i had the b18a1 on there. How can you tell if the tensioner is bad?

nicknack25

Oh when i started it, it was making kind of like a slapping sound? Maybe the belt was slapping the valve cover. cant really tell.

javie3

might be tensioner

nicknack25

But it was fine with the b18a1 head..

fin781

If it were me, i wouldnt want mine to jump time, pull the belt
off and timing cover and check your tensioner. just suggestion

singlecamsaint

are the a1 and b1 deck heights different i know d series deck heights vary

nicknack25

If i don't loosen the tensioner enough, would that cause the tensioner to not snap back getting my full tension?

nicknack25

If im not mistaken, they are the same. but on my b1, 5k was shaved off to be resurfaced.

singlecamsaint

ok then i would check the tensioner or try the belt for the b1

Targa250R

B18A and B18B use the same belt, pump, sprockets, and tensioner. 0.005" off the head isn't going to make the timing belt loose.

You must not have set the tensioner properly.

silent702

yeah the tensioner is not set properly put a screw driver bown there by the tensioner n push the tensioner tht might help tht happened to me before

nicknack25

Okay i found what was wrong, when im supposed to loosen the tensioner, i did not loosen it enough so that it can snap back and put tension on the belt. So i just loosened it more and it was fine. Thanks guys.