POP while installing crank bolt, now CEL and TCS! - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

NoHaveMSG · 12-09-2021, 06:28 PM

Quote:

Originally Posted by Wingnutt

Alrighty update time!

I got the timing cover off today and..

2 teeth broken off of the front timing chain sprocket.. so now I guess Ill order that.

EDIT: so what is the best way to get the old sprocket off? will it just slide off once the tension is off the timing chains?

It should slide off if the chains are removed. If it doesn't there may be some damage to the snout of the crank.

If it doesn't come off I would say a clamshell would be the best bet. I don't think a jaw'd puller will work well. Just don't bite the crank.

https://www.harborfreight.com/bearin...tor-63662.html

Ashikabi · 12-09-2021, 06:29 PM

Gonna need to do a compression test after all this for sure bro

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dragoontwo · 12-09-2021, 06:37 PM

Have you checked the timing yet to see if it's out and how far?

Ashikabi · 12-09-2021, 06:41 PM

Quote:

Originally Posted by dragoontwo

Have you checked the timing yet to see if it's out and how far?

He broke teeth so he's gotta be off at least 1tooth

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Wingnutt · 12-09-2021, 07:33 PM

Well the new parts are ordered, I'll check the timing before i put everything back together obviously.

blsfrs · 12-10-2021, 02:02 PM

Quote:

Originally Posted by Ashikabi

Gonna need to do a compression test after all this for sure bro

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op might get lucky. In my (bank 1) broken timing chain saga, I had 0 compression on #3 and 120 on #1 but no bent valves. Go figure.

Trouble is here is that he has get it all back together to do a compression test.

Ashikabi · 12-10-2021, 02:08 PM

Quote:

Originally Posted by blsfrs

op might get lucky. In my (bank 1) broken timing chain saga, I had 0 compression on #3 and 120 on #1 but no bent valves. Go figure.

Trouble is here is that he has get it all back together to do a compression test.

Indeed. Then take it all back apart to fix it

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Capt Spaulding · 12-11-2021, 05:45 PM

I guess he could replace the sprocket, time the cams, and do a leakdown on each cyl spinning the crank between. It's not that far beyond where he is and certainly not a complete button-up - compression test - teardown cycle.

Wingnutt · 12-11-2021, 07:36 PM

I don't think it jumped timing, missing two teeth doesn't allow the chain to really move, it's still engaging multiple teeth at any given point in the rotation.

dragoontwo · 12-11-2021, 08:24 PM

Quote:

Originally Posted by Wingnutt

I don't think it jumped timing, missing two teeth doesn't allow the chain to really move, it's still engaging multiple teeth at any given point in the rotation.

You'll have to check the timing before removing anything to be sure. Please do so and report back.

Ashikabi · 12-11-2021, 09:32 PM

Quote:

Originally Posted by Wingnutt

I don't think it jumped timing, missing two teeth doesn't allow the chain to really move, it's still engaging multiple teeth at any given point in the rotation.

But that's how the teeth broke when the chain jumped

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Wingnutt · 12-11-2021, 10:23 PM

Teeth broke because i jammed the wodruff key into them like a total ding dong.

Ashikabi · 12-11-2021, 10:52 PM

Quote:

Originally Posted by Wingnutt

Teeth broke because i jammed the wodruff key into them like a total ding dong.

That's possible I suppose

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Capt Spaulding · 12-12-2021, 03:23 PM

With the timing cover off it's easy enough to check.

12-11-2021, 05:45 PM	#36
Capt Spaulding Persona Non Grata Join Date: Nov 2015 Drives: '15 BRZ (WRB) Location: On the Border Posts: 1,882 Thanks: 2,016 Thanked 2,780 Times in 1,200 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	I guess he could replace the sprocket, time the cams, and do a leakdown on each cyl spinning the crank between. It's not that far beyond where he is and certainly not a complete button-up - compression test - teardown cycle. __________________ Slow is smooth, and smooth is fast

12-12-2021, 03:23 PM	#42
Capt Spaulding Persona Non Grata Join Date: Nov 2015 Drives: '15 BRZ (WRB) Location: On the Border Posts: 1,882 Thanks: 2,016 Thanked 2,780 Times in 1,200 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	With the timing cover off it's easy enough to check. __________________ Slow is smooth, and smooth is fast

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12-09-2021, 06:29 PM	#30
Ashikabi Senior Member Join Date: Aug 2014 Drives: 2013 FR-S Location: Northwest Iowa Posts: 7,355 Thanks: 454 Thanked 4,543 Times in 2,948 Posts Mentioned: 59 Post(s) Tagged: 5 Thread(s)	Gonna need to do a compression test after all this for sure bro Sent from my ONEPLUS A5010 using Tapatalk

12-09-2021, 06:37 PM	#31
dragoontwo Senior Member Join Date: May 2020 Drives: 22 BRZ limited Location: Clarksville TN Posts: 1,189 Thanks: 217 Thanked 997 Times in 524 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Have you checked the timing yet to see if it's out and how far?

12-09-2021, 07:33 PM	#33
Wingnutt Member Join Date: Apr 2021 Drives: Pearl White 2014 Location: Texas Posts: 77 Thanks: 1 Thanked 46 Times in 17 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Well the new parts are ordered, I'll check the timing before i put everything back together obviously.

12-11-2021, 07:36 PM	#37
Wingnutt Member Join Date: Apr 2021 Drives: Pearl White 2014 Location: Texas Posts: 77 Thanks: 1 Thanked 46 Times in 17 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I don't think it jumped timing, missing two teeth doesn't allow the chain to really move, it's still engaging multiple teeth at any given point in the rotation.

12-11-2021, 10:23 PM	#40
Wingnutt Member Join Date: Apr 2021 Drives: Pearl White 2014 Location: Texas Posts: 77 Thanks: 1 Thanked 46 Times in 17 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Teeth broke because i jammed the wodruff key into them like a total ding dong.

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