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Old 05-17-2012, 01:28 PM   #1
BoostedNightmare
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Default timing belt install question

So I have a built motor that has everything done to it. YES everything. Installed the engine and it won't start. Keeps backfiring. So first thought is timing. My question is can the crank be 180 out. Typical engines u set #1 to top dead and then set cams from there. Well #1 doesn't ever seem to be at top dead. #1 I assume is passenger front being its the furthest cylinder forward. Have read every timing belt install and nothing points to if u have turned the crank and have them out of phase with cams and how to set it up properly. Any help would be great.
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Old 05-17-2012, 02:24 PM   #2
WRXSD
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Quote:
Originally Posted by BoostedNightmare View Post
So I have a built motor that has everything done to it. YES everything. Installed the engine and it won't start. Keeps backfiring. So first thought is timing. My question is can the crank be 180 out. Typical engines u set #1 to top dead and then set cams from there. Well #1 doesn't ever seem to be at top dead. #1 I assume is passenger front being its the furthest cylinder forward. Have read every timing belt install and nothing points to if u have turned the crank and have them out of phase with cams and how to set it up properly. Any help would be great.

I remember someone on here doing that and they ended up being fine. Lined up everything but put the N at 12 oclock on the crank, and not the mark.
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Old 05-17-2012, 03:03 PM   #3
BoostedNightmare
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180 out won't damage anything correct just not sure what happened and how to correct or keep from happening again
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Old 05-17-2012, 03:38 PM   #4
WRXSD
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Having the crank 180 out will just have the intake valves open during the exhaust cycle and vice versa. I don't recall how he corrected it. I want to say he had everything lined up and then just rotated the crank, but don't quote me on that.

Edit: Doesn't read like he lined it all up when rotating the crank:


Found it:
http://forums.nasioc.com/forums/show....php?t=2199427
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Old 05-17-2012, 08:11 PM   #5
BoostedNightmare
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Well obviously I have just rotated the crank but not sure how from start to make sure this doesn't happen again. I understand that when u are just doing a timing belt everything is already lined up and u just install a new belt, but if u are building the engine ground up how do u know where to put the crank so all is well and then yes I know u then phase the cams
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Old 05-17-2012, 08:16 PM   #6
J_Baker
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The half-moon pill on the crank...

You did install the rods the right direction for each cylinder, right? 1-3-2-4 in order of getting to TDC, remember...

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Old 05-18-2012, 06:24 PM   #7
BoostedNightmare
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Originally Posted by J_Baker View Post
The half-moon pill on the crank...

You did install the rods the right direction for each cylinder, right? 1-3-2-4 in order of getting to TDC, remember...

Unsure: the machine shop assembled the engine I just put the timing belt on and they are pretty knowledgable about suby engines so I would assume they did it right
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Old 05-18-2012, 06:43 PM   #8
LivingLEEgend
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if your timing belt was installed in the wrong position then its already too late. assuming the timing is set right then i would check to make sure you have the coil pack connectors on right. white in the front and black in the back. Ive seen them installed backwards and it causes backfiring and wont start. hope this helps
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