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Engine wont start

I am not to sure on the chain exactly, i pulled it off the old motor i had bought the car from. i remember seeing that the crank and cam sprockets said "Rollermaster" on it. and its a single roller chain, and it was tight with the new tensioner i put on.
 


IIRC there were 4 grooves like. but it only seem to fit one way. i remember the teeth were more meatier then the stock. but i think there was 1 slot bigger then the other for the keyway on the crankshaft to enter.. because i remember now we thought the sprocket was to small for the crankshaft because we had a hard time getting it to fit. but IIRC there was only 1 way of it really going
 
i just found this diagram. if this is the sprocket i have, it looks like it goes on multiple different ways...........


scan0004.jpg
 


lol not hating towards you or anything, because i was making the same mistake, but caught it before i threw together. but im thinking this now.. im in theory thinking that my crankshaft sprocket is on 180* backwards. thus intake is opening on exhaust stroke, and exhaust opening on intake stroke? causing that cough? and of course nothing is broken inside because well, in theory just the valves are opening and closing backwards right? maybee im wrong, im not exactly sure how the engine works, but if that were the case, would i be seeing gas on the plugs?
 
Hixc said:
lol not hating towards you or anything, because i was making the same mistake, but caught it before i threw together. but im thinking this now.. im in theory thinking that my crankshaft sprocket is on 180* backwards. thus intake is opening on exhaust stroke, and exhaust opening on intake stroke? causing that cough? and of course nothing is broken inside because well, in theory just the valves are opening and closing backwards right? maybee im wrong, im not exactly sure how the engine works, but if that were the case, would i be seeing gas on the plugs?
Click to expand...

If it was 180 degrees off, your pistons would have smashed into your valves and bent them. Do a compression test to be sure.
 
i take the picture because then you know. Looks like you are going back into the timing cover.

A trick you can use is line up the crank with the original gear and then line things up with your new gear and put your old gear on after to see that it's lined up.
IMG_1637.jpg


There's just so many different ways a guy could install the gear that it makes it confusing. Here is a rollmaster double installed for reference
IMG_6871.jpg


IMG_6868.jpg
 
is there actually 2 different tick marks on the crank sprocket? 1 on the front and on the teeth itself? i remember i lined up 2 arrows. dont remember lining up any dots
 
by looking at those pictures, i must be 2 teeth off on the crank. looks like im taking front cover off. Anyone have a writeup on the quickest way i can do this without having to pull the motor? ill post pics of my before and after
 


Hixc said:
is there actually 2 different tick marks on the crank sprocket? 1 on the front and on the teeth itself? i remember i lined up 2 arrows. dont remember lining up any dots
Click to expand...

The dot on the crank sprocket is not on the teeth, at least not on my car. It's at the end of the round portion of the sprocket. There is a picture in my long thread that shows it.
 
Hixc said:
by looking at those pictures, i must be 2 teeth off on the crank. looks like im taking front cover off. Anyone have a writeup on the quickest way i can do this without having to pull the motor? ill post pics of my before and after
Click to expand...

Do it through the passenger wheel well. It will only take a couple hours or so.
 
do i need to replace any gaskets? I really would love to be able to reuse the new gaskets i just put on for the front cover lol
 
if you didn't rtv the crap out of both sides, and it comes off in one piece i don't see why not. if no rtv at all re use it, the car never started and got hot.
 
You can re use the metal front gasket if there's no RTV on it. Just to let you know though, when you reinstall the front cover, put RTV on the bottom 2 inches of the front cover (both sides of the gasket), as well as on the oil pan gasket. That thing is so hard to get to seal without RTV.
 


PUll the wheel and splash shield
DRain coolant
Pull the balancer
Pull the crank sensor and plastic shield
Pull the 13mm bolts holding the timing cover on. (if you are good, you can sneak past the idler fo the SC)
Pull cam bolt, adjust gears/chain and pray
Reverse procedure.
 
im going to do this friday afternoon. i will definetely take and post a picture of my dots, so i can make sure. my brothers timing chain in his 240sx just broke, so today im helping him time his 240sx with the dizzy lol. so much timing work to do this week!
 
what size are the 3 bolts that i need to put inside the harmonic balancer puller? diameter and length? are these bolts something i can buy locally at a autoparts store? or do i have to go to the local hardware store. id rather not have to buy from ZZP because im going to be doing this today..(fixing my timing issue) the bolts i used before to do this were barely enough to work with the engine out of the car. im not sure if i have enough room to get these to fit with the engine still in the car. i wanted exact bolts for an easy removal.
 
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