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Author Topic: 400 timing cover  (Read 15886 times)

Offline hogwild

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400 timing cover
« on: October 30, 2007, 08:11:37 PM »
is 400 timing pointer different than other sbc ? , i baught a chrome cover  for sbc and the pointer is off to side , i am not sure if it should be in the middle or off to side on my 400
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1986 sb 406 ci
2003 mud buggy 1300 hp 528
if my wife askes it was only fifteen bucks

Offline chevy754x4

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Re: 400 timing cover
« Reply #1 on: October 30, 2007, 09:13:14 PM »
I just swapped out a sb 400 for a TBI 350 and the pointer on the 400 was in the same location as the 350 as far as I could tell
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Offline VileZambonie

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Re: 400 timing cover
« Reply #2 on: October 30, 2007, 09:19:03 PM »
That's correct location. 305's have em in the middle...

One thing you should do is verify your marks when the piston is at true TDC...
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Offline hogwild

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Re: 400 timing cover
« Reply #3 on: October 30, 2007, 09:37:16 PM »
thanks for the fast replies ,geus i do have the correct pointer. i went and looked at a freinds 400 and pointer is in the middle, sounds like he is going to be pissed when i tell him its a 305. i cant check true tdc i have put the cover on , when i put balancer pointing strait up both valves are closed and when i turn it 1/8 of a turn they are still closed, any more ideas?
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1986 sb 406 ci
2003 mud buggy 1300 hp 528
if my wife askes it was only fifteen bucks

Offline VileZambonie

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Re: 400 timing cover
« Reply #4 on: October 30, 2007, 10:16:12 PM »
yeah they will stay closed when you are on tdcc. You can pull the spark plug out and get a bright light. Look in the spark plug hole and see the piston physically reach TDC.
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Offline hogwild

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Re: 400 timing cover
« Reply #5 on: November 24, 2007, 09:30:57 PM »
wrong answer ! . motor is all done and in truck and timing pointer should have been strait up . now what ?. i cant set timing
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1986 sb 406 ci
2003 mud buggy 1300 hp 528
if my wife askes it was only fifteen bucks

Offline 123 pugsy

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Re: 400 timing cover
« Reply #6 on: November 24, 2007, 09:52:20 PM »
Here's a few pics of the same problem. I got a new balancer and found the mark was in a different place. I found the top location a pain to see the mark so I welded the tab off to the side using the old one for reference and then cut a 2nd slot with a hacksaw on the new balancer.

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Pugsy
76 C10 LWB
TPI 350

Offline hogwild

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Re: 400 timing cover
« Reply #7 on: November 24, 2007, 09:58:05 PM »
think i will do the  same, but use a timing tape. only problem is i dont know were strait up is and motor is in truck and running
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1986 sb 406 ci
2003 mud buggy 1300 hp 528
if my wife askes it was only fifteen bucks

Offline 123 pugsy

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Re: 400 timing cover
« Reply #8 on: November 24, 2007, 10:04:35 PM »
The best way to find TDC is by using a piston stop.
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Pugsy
76 C10 LWB
TPI 350

Offline VileZambonie

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Re: 400 timing cover
« Reply #9 on: November 25, 2007, 03:44:31 PM »
If you pull the spark plug out and get a light and inspection mirror you can visually see TDC accurate enough to make a timing mark. the best way to find TDC is with a dial indicator
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Offline hogwild

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Re: 400 timing cover
« Reply #10 on: November 25, 2007, 04:10:14 PM »
flash light and a mirror to find tdc, coming from the one who steered me wrong in the first place this advise dosent suprise me, i will buy a piston stop and do it rite this time thanks >:(
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1986 sb 406 ci
2003 mud buggy 1300 hp 528
if my wife askes it was only fifteen bucks

Offline VileZambonie

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Re: 400 timing cover
« Reply #11 on: November 25, 2007, 05:46:01 PM »
Quote from: hogwild on November 25, 2007, 04:10:14 PM
flash light and a mirror to find tdc, coming from the one who steered me wrong in the first place this advise dosent suprise me, i will buy a piston stop and do it rite this time thanks >:(

A piston stop is used for degreeing in your cam when the heads are installed. Finding the mark on your balancer vs the timing tab is going to be easiest to visualize without pulling the heads but hey I steered you wrong in the first place right? and this "dosen't" surprise you?
« Last Edit: November 26, 2007, 10:49:04 AM by Captkaos »
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Offline hogwild

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Re: 400 timing cover
« Reply #12 on: November 25, 2007, 07:22:06 PM »
piston stops are used to find tdc period , i will buy one set tdc make new mark end of problem. not wanting to be the enemy here, i will appolagise for my sarcasem and my spelling .
« Last Edit: November 26, 2007, 10:49:32 AM by Captkaos »
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1986 sb 406 ci
2003 mud buggy 1300 hp 528
if my wife askes it was only fifteen bucks

Offline Captkaos

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Re: 400 timing cover
« Reply #13 on: November 26, 2007, 11:11:37 AM »
Keep it civil here, nothing said was "wrong".  If you don't like someones advise, ignore it.  It isn't acceptable behavior to attack fellow members.

If the engine is in the truck running, pull the plug out of the #1 cylinder and put your finger over it and have someone bump it over with the coil unplugged, that will get you close enough.  The only way you are going to find actual TDC in relation to the timing mark is to pull the head off and put a dial indicator on it.
A piston stop is going to stop the piston from reaching actual TDC, it will work just as well as putting your finger over the plug hole.  Any of these suggestions are were fine.
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Offline 123 pugsy

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Re: 400 timing cover
« Reply #14 on: November 26, 2007, 11:51:18 AM »
Quote from: Captkaos on November 26, 2007, 11:11:37 AM
The only way you are going to find actual TDC in relation to the timing mark is to pull the head off and put a dial indicator on it.
A piston stop is going to stop the piston from reaching actual TDC, it will work just as well as putting your finger over the plug hole.  Any of these suggestions are were fine.

The piston stop is inserted into #1 cylinder and the engine is rotated (SLOWLY) till it makes contact. Then draw a line from your timing indicator 0* to the balancer. Now spin the engine the opposite direction (SLOWLY) until it stops again. Draw a line from 0* on the timing tab to the balancer. Exact TDC will be between the two marks.
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Pugsy
76 C10 LWB
TPI 350
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