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New Tech Tip - Timing cover mod for easy removal
#913369 Mon Jan 21 2013 10:58 AM
Joined: Apr 2004
Posts: 2,911
Peggy M Offline OP
Worker Bee
Thanks to Sweet for sending this one in.

As it starts:

Didja know, on most Stovebolt Sixes, the oil pan must be removed to get the timing cover off? And if you DID know that, didja come by that knowledge the hard way?? They says true wisdom is learning from others' experience. If you ever want to get at your timing chain without all the drama of dropping the oil pan first, all you have to do is make an easy...

Read the rest.

Peg

Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #913381 Mon Jan 21 2013 11:44 AM
Joined: Sep 2006
Posts: 2,960
D
Shop Shark
Definitely a good tip that many of us have used. The only thing I would suggest is to use allen head bolts as opposed to hex head because there can be a wrench/socket clearance issue with the cover in installing and removing the hex head bolts. Using a handled allen wrench alleviates that issue.


Drew
Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #913413 Mon Jan 21 2013 02:11 PM
Joined: May 2012
Posts: 805
M
Shop Shark
NOW you post this!!!! grin


1955 2nd chevy 4400 series 1.5 ton, affectionately named Mater

1969 GMC Heavy Half LWB fleetside with TH400 305 v6 named Blue Thunder

Miss Daisy, the 1949 Dodge Coronet 4 door with Gyromatic transmission

Project While-I'm-at-it, the 1972 GMC Sprint (5.3LS with 4l60e swap underway)

----------------------------------------------------
There are three things that I've learned never discuss with people: religion, politics, and the Great Pumpkin.----Linus Van Pelt

Trying to understand the behavior of some people is like trying to smell the color 9 big_eek

Some people are like glo sticks, I just want to snap them, and shake the snot out of them until the light comes on!!



Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #913728 Tue Jan 22 2013 01:51 PM
Joined: Dec 2011
Posts: 443
Shop Shark
My word, but that's a nice-looking engine!

And, I might add, this tech tip work only cost me three beers (I think SWEET would have done it for two, but I'd have paid a case).

Looks great.

Jim


1957 Chevrolet 3100 Stepside
235, 3-speed w/OD
In the Stovebolt Gallery [stovebolt.com]
Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #913737 Tue Jan 22 2013 02:47 PM
Joined: Aug 2004
Posts: 1,392
ODSS Lawman
Well then, looks like I need to stop by for a few cold ones!!



SWEET
Sergeant At Arms
Old Dominion Stovebolt Society

BUNS?!?!?! Where we're going, we don't need no buns.....

1950 GMC 450 (25% owner)
1951 Chevy 1/2-Ton
The GreenMachine
In the Stovebolt Gallery [stovebolt.com]
Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #914839 Sat Jan 26 2013 02:20 PM
Joined: Apr 2005
Posts: 624
1
Shop Shark
WHOA, just read the Tech tip and it says to use a 3/8 drill bit to drill and tap for a 3/8-16 bolt.Should this not read drill the holes to 5/16 inch and tap to 3/8-16? Jerry




Jerry
Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #914918 Sat Jan 26 2013 08:13 PM
Joined: Apr 2005
Posts: 624
1
Shop Shark
OK, Here is what I found on the 235 block that I am getting ready to replace my 1951 chevy 216 engine and trying to follow the original posted tech tip. Will this mental torture ever end? The 2 lower bolts removed from Inside the pan threaded into the timing gear cover were 5/16-24 grade 5 bolts. When I fit a 5/16 drill bit shaft into those 2 block holes, it is sloppy loose.That is the bore size I would use to thread the 2 holes to 3/8-16 as per tech tip. Going up in size in drill bit diameter, I find that a 21/64 inch drill bit just fits the existing hole. looking at my US Tap and Drill Bit Size Table, that is the exact size needed for a 3/8-24 inch bolt. Please, I already drilled out the Timing gear cover to 3/8 inch. Is my block a misfit? Thanks to all for guidance! Jerry




Jerry
Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #914952 Sat Jan 26 2013 10:33 PM
Joined: May 2001
Posts: 8,386
Extreme Gabster
Only the cover needs to be drilled. The holes in the cap can be tapped as is, as 51 said above.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.
My TRUCKS website
Re: New Tech Tip - Timing cover mod for easy removal
Peggy M #915819 Wed Jan 30 2013 01:58 AM
Joined: Feb 2001
Posts: 1,112
D
Shop Shark
Please read the tech tip carefully. It does NOT say to drill the bearing cap . Just the covers.

Re: New Tech Tip - Timing cover mod for easy removal
Dusty #915864 Wed Jan 30 2013 08:14 AM
Joined: Jan 2013
Posts: 10
C
New Guy
I used to drill and make them removable from the front in the early 70's i also modified the front of the block to get the extra oil in the cover to drain back to the pan faster. This was easier than adding a fitting and drain line to get it back to the pan.I learned the oil drain trick from some of the old timers that raced these old engines on circle track and speed trap runs.

If you modify the block to drain the oil from your timing cover, the gears explosions will end and RPM will increase dramatically. My old 6 was built in the 70's at and has a lot of miles on it and has seen RPM's way over the normal range.

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