frost plug behind timing cover - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dubie · 06-28-2004, 07:20 PM

Just wanted to know how inportant the 3 little plugs are that sit in the block behind the timing chain cover. Do they keep coolant out of the oil in the timing chain??

dubie · 06-28-2004, 07:30 PM

i just found out they are the oil gallery plugs hehehe oh man I'm in for a looooong night. I dropped the pan to re seal it and found one of the plugs sitting in the bottom of the timing chain cover,which would explain the slight knocking in the engine. Anyone know what size they are in an 82, 350 block?

walker · 06-28-2004, 08:00 PM

I'd drill and tap them for a 1/4" pipe plug, but since your motor is together... I would just measure the one you got, get a new one the same size. When you put it in be sure to stake them in there with a punch. You might even put some sticky goo of some sort on 'em so as they don't walk off again.

JimKshortstep4x4 · 06-28-2004, 08:10 PM

We always replace the drive in plugs with 1/4 NPT screw in plugs. The holes are the right size for the tap threads. We have always down ours as part of the rebuild prior to hot tanking so I have not done one on a running engine.
However, I believe that with a little care metal shavings can be kept out of the engine.

Threaded plugs won't blow out like the drive in ones so it might be worth installing the pipe plugs.

If you want to go back with drive in plugs, I will mail you three for a buck, (US).

Jim

crazy longhorn · 06-28-2004, 08:30 PM

I also run pipe plugs......being that the eng is assembled, i would put the cup plugs back in , & stake them in 4 places to aviod any unneeded shavings in the eng. best of luck,crazyL

dubie · 06-28-2004, 08:37 PM

ok guys, now that it's all apart, and I need to align the timing chain dimples again, how do I do that?? I have the lower gear dimple facing up but the upper gear that attaches to the cam shaft isn't lined up. How do I get them to line up?

72C203503ONTHETREE · 06-28-2004, 10:53 PM

Just turn the cam sprocket so that the dot on the cam sprocket is at the bottom right next to the crank gear dot. Shouldnt be too bad to turn if its only a few teeth off.

dubie · 06-28-2004, 11:18 PM

well i got it all lined up and the front of the engine is ready to re-assemble. Just gotta wait till i can cen the 25 cent plug tomorrow, then I gotta haul as stomorrow night to get it all back together,

06-28-2004, 07:20 PM	#1
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	frost plug behind timing cover Just wanted to know how inportant the 3 little plugs are that sit in the block behind the timing chain cover. Do they keep coolant out of the oil in the timing chain?? __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

06-28-2004, 07:30 PM	#2
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	i just found out they are the oil gallery plugs hehehe oh man I'm in for a looooong night. I dropped the pan to re seal it and found one of the plugs sitting in the bottom of the timing chain cover,which would explain the slight knocking in the engine. Anyone know what size they are in an 82, 350 block? __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

06-28-2004, 08:00 PM	#3
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	I'd drill and tap them for a 1/4" pipe plug, but since your motor is together... I would just measure the one you got, get a new one the same size. When you put it in be sure to stake them in there with a punch. You might even put some sticky goo of some sort on 'em so as they don't walk off again. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

06-28-2004, 08:30 PM	#5
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	I also run pipe plugs......being that the eng is assembled, i would put the cup plugs back in , & stake them in 4 places to aviod any unneeded shavings in the eng. best of luck,crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

06-28-2004, 08:37 PM	#6
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	ok guys, now that it's all apart, and I need to align the timing chain dimples again, how do I do that?? I have the lower gear dimple facing up but the upper gear that attaches to the cam shaft isn't lined up. How do I get them to line up? __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

06-28-2004, 08:10 PM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	We always replace the drive in plugs with 1/4 NPT screw in plugs. The holes are the right size for the tap threads. We have always down ours as part of the rebuild prior to hot tanking so I have not done one on a running engine. However, I believe that with a little care metal shavings can be kept out of the engine. Threaded plugs won't blow out like the drive in ones so it might be worth installing the pipe plugs. If you want to go back with drive in plugs, I will mail you three for a buck, (US). Jim

06-28-2004, 10:53 PM	#7
72C203503ONTHETREE Registered User Join Date: Apr 2004 Location: Grant, Alabama Posts: 504	Just turn the cam sprocket so that the dot on the cam sprocket is at the bottom right next to the crank gear dot. Shouldnt be too bad to turn if its only a few teeth off. __________________ 72 Chevy C20, SOLD (Dang it.) 09 Challanger RT six speed in all black. 74 Datsun 710 wagon, all 1.8 liters of screaming Datsun power. 73 C10 long bed, 350/350 combo, nice shape.

06-28-2004, 11:18 PM	#8
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	well i got it all lined up and the front of the engine is ready to re-assemble. Just gotta wait till i can cen the 25 cent plug tomorrow, then I gotta haul as stomorrow night to get it all back together, __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795



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