| New timing marks [message #331653] |
Wed, 02 May 2018 12:26  |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
|
Senior Member |
|
|
While I am looking at the bottom of my engine and considering what it will be like to degree in the cam. (I always check new cams.) I was thinking about what a PITA it is to check the ignition timing in the coach. I have worked on lots of engines in strange places, and sailboat engines are always in places you can't use for much else. But, all the real marine engines (not repurposed passcar) have the flywheel at the front of the engine and they usually have timing marks there....
Suppose that while I was confirming TDC, I was to mark the ring gear/flywheel and then pop a hole in the bell housing so I could see it.
I suspect that this might make setting and checking the timing a little easier.
While I do plan to install an Emery-esk timing pointer, you still have to get it right at least once.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
| Re: New timing marks [message #331711 is a reply to message #331653] |
Fri, 04 May 2018 07:03  |
Chris Tyler
Messages: 458
Registered: September 2013
Location: Odessa FL
Karma: 7
|
Senior Member |
|
|
I dont see why it wouldn't work, and it would certainly be easier.
Question is where and how to put the hole in- and how to mark the flexplate so that is easily visible and not obliterated by the starter gear
You would have to use a 'dial back to zero' timing light
76 Glenbrook
|
|
|
|
|
|
| Re: [GMCnet] New timing marks [message #331716 is a reply to message #331713] |
Fri, 04 May 2018 10:38 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
|
Senior Member |
|
|
Interesting solution, all those flying belts and fan are pretty dangerous.
What is the emory-esk timing pointer?
________________________________
From: Gmclist on behalf of Matt Colie
Sent: Friday, May 4, 2018 7:58 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] New timing marks
Chris Tyler wrote on Fri, 04 May 2018 08:03
> I dont see why it wouldn't work, and it would certainly be easier.
> Question is where and how to put the hole in- and how to mark the flexplate so that is easily visible and not obliterated by the starter gear
> You would have to use a 'dial back to zero' timing light
Chris,
My engine is currently apart. (My barn is kind of like one of those sort out the numbers games, but I forgot to leave an open space.) As I will have
to trammel (check center by rotating to a hard stop) the crank (when I finally get it back from polish) in preparation for checking the cam timing, I
will have a good opportunity to mark the teeth of the ring gear and put a registration on the back of the block. After I count the teeth of the ring
gear, I can mark them and have a very precise calibration.
I am expecting to take pictures and write about this as it goes on.
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
|
|
|
|
| Re: [GMCnet] New timing marks [message #331717 is a reply to message #331716] |
Fri, 04 May 2018 11:03 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
6 cylinder Volvo cars that look like boxes, have the timing marks on the
flywheel. They have a plastic plug that snaps into a hole in the bell
housing that you pop out when you want to set the base timing. Their fuel
injection and ignition are computer controlled, like GM stuff. If that
engine were in a GMC motor home, it would be a snap to set the timing. In a
Volvo car, not so much. What might work for a GMC would be a fiber optic
cable permanently secured to the front of the block and focused on the
timing pointer. Or perhaps a hollow tube that a video camera might slide
into. I don't much like having my hands and fingers up there no matter how
many dozens of times I have done it, it still makes me nervous.
Jim Hupy
Salem, Or
On Fri, May 4, 2018, 8:39 AM Keith V wrote:
> Interesting solution, all those flying belts and fan are pretty dangerous.
>
> What is the emory-esk timing pointer?
> ________________________________
> From: Gmclist on behalf of Matt Colie matt7323tze@gmail.com>
> Sent: Friday, May 4, 2018 7:58 AM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] New timing marks
>
> Chris Tyler wrote on Fri, 04 May 2018 08:03
>> I dont see why it wouldn't work, and it would certainly be easier.
>> Question is where and how to put the hole in- and how to mark the
> flexplate so that is easily visible and not obliterated by the starter gear
>> You would have to use a 'dial back to zero' timing light
>
> Chris,
>
> My engine is currently apart. (My barn is kind of like one of those sort
> out the numbers games, but I forgot to leave an open space.) As I will have
> to trammel (check center by rotating to a hard stop) the crank (when I
> finally get it back from polish) in preparation for checking the cam
> timing, I
> will have a good opportunity to mark the teeth of the ring gear and put a
> registration on the back of the block. After I count the teeth of the ring
> gear, I can mark them and have a very precise calibration.
>
> I am expecting to take pictures and write about this as it goes on.
>
>
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
|
|
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
