Cut slot in bell housing, ability to turn engine |
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Monday, 6 January 2025 |
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Cut slot in bell housing, ability to turn engine |
930cabman |
May 17 2021, 06:15 PM
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#1
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Advanced Member Group: Members Posts: 3,803 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
I can find no easy way to turn the engine in small increments as needed to adjust valves, static spark timing, etc. Spark plugs removed to relieve compression of course. It seems to make sense to cut a small ( 3/8 x 1/2") slot in the bell housing to allow for a screwdriver to engage with the ring gear for small adjustments.
Have a fallen off my rocker? thanks |
ClayPerrine |
May 17 2021, 08:43 PM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,967 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Use a 13mm socket on an extension in the center of the fan. Or just reach down and grab the fan pulley and turn. If the plugs are out and it is in neutral it should be easy to turn that way.
Clay |
rgalla9146 |
May 17 2021, 08:59 PM
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#3
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Advanced Member Group: Members Posts: 4,673 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None |
4 cyl. ?
Plugs out trans in 1st gear one rear wheel prevented from turning by any method you can devise rotate other rear wheel....engine turns Adjusting valves ? when the valves on one side are moving in opposite directions as you rotate the tire, the valves on the opposite cylinder are in correct position to adjust valves. The factory under car method. There is a factory tool to set the Ebrake on one rear caliper at a time....just for this operation. Rory |
rjames |
May 17 2021, 09:04 PM
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#4
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I'm made of metal Group: Members Posts: 4,162 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
It wouldn't work for adjusting the valves, but for static timing I've gotten pretty good at being able to have one hand in the the engine compartment, and with the car in 5th gear and on flat pavement, nudging the car forward or backwards to turn the engine.
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930cabman |
May 18 2021, 04:04 AM
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#5
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Advanced Member Group: Members Posts: 3,803 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Use a 13mm socket on an extension in the center of the fan. Or just reach down and grab the fan pulley and turn. If the plugs are out and it is in neutral it should be easy to turn that way. Clay The engine is on the test bench (and runs), I am not happy with the hex rod twin Weber linkage setup, but looking to modify or spring for the CSP system when it comes available. I have not tried to turn the 13mm bolt on the fan, but will give it a try Thank you Yes, 4 cylinder |
Superhawk996 |
May 18 2021, 06:10 AM
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#6
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914 Guru Group: Members Posts: 6,637 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Note on turning crank nose / fan hub bolt. Turn in clockwise (tightening) direction (toward driver side).
You don't want to loosen the hub inadvertently. As Clay mentioned, fan pulley gives you a nice grip and some mechanical advantage over use of the center hub nut. |
GregAmy |
May 18 2021, 06:53 AM
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#7
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Advanced Member Group: Members Posts: 2,417 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
Word of warning...that 13mm hub bolt is not designed for the amount of torque that is required to turn an engine, even with plugs out. And, if torqued too much, it is very likely to snap off.
That would make for A Bad Day. |
brant |
May 18 2021, 09:56 AM
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#8
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914 Wizard Group: Members Posts: 11,828 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
There is also an $9 remote starter switch from flaps...
I use mine every single valve adjustment. cutting the bellhousing is not a good solution for this problem. |
SirAndy |
May 18 2021, 11:03 AM
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#9
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Resident German Group: Admin Posts: 41,958 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
As said above, put the rear in the air, car in gear, lock one wheel (with a bar etc) and turn the other ...
(IMG:style_emoticons/default/smile.gif) |
930cabman |
May 18 2021, 12:14 PM
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#10
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Advanced Member Group: Members Posts: 3,803 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
As said above, put the rear in the air, car in gear, lock one wheel (with a bar etc) and turn the other ... (IMG:style_emoticons/default/smile.gif) Thanks Andy, but in this case the engine/tranny are on a bench for testing. In the future I will use your method when everything is assembled. |
930cabman |
May 18 2021, 12:18 PM
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#11
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Advanced Member Group: Members Posts: 3,803 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Word of warning...that 13mm hub bolt is not designed for the amount of torque that is required to turn an engine, even with plugs out. And, if torqued too much, it is very likely to snap off. That would make for A Bad Day. My initial thought, a broken 8mm bolt in the crank would not be a good day. I might go for a small slot in the bell housing |
Mark Henry |
May 18 2021, 01:00 PM
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#12
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
If the engine is out I would re-mark the fan so it's easier for us old farts to read. I also add a BDC mark.
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GregAmy |
May 18 2021, 01:03 PM
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#13
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Advanced Member Group: Members Posts: 2,417 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
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930cabman |
May 18 2021, 01:12 PM
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#14
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Advanced Member Group: Members Posts: 3,803 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
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930cabman |
May 18 2021, 01:13 PM
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#15
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Advanced Member Group: Members Posts: 3,803 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Thanks Andy, but in this case the engine/tranny are on a bench for testing. In the future I will use your method when everything is assembled. Use a prybar in the starter hole. Piece o' cake to R&R the starter, especially on the bench. Greg, Exactly, thank you. |
VaccaRabite |
May 18 2021, 01:43 PM
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#16
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En Garde! Group: Admin Posts: 13,629 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I've done a good bit of playing with engines on the test stand.
With the plugs out and engine out of the car, the engine is fairly easy to rotate by grabbing the "fan" belt and pulling that to rotate the crank. If the fan belt is off I have also just grabbed the fan and rotated it. DO NOT try to wedge a screwdriver into the fan vanes and turn it that way. That is how the fan vanes break - though this was a very common way to do it "back in the day." I've also taken the dog house and fan off and used a bar between the bolts to rotate the engine that way - but that's more when I was setting pushrod geometry. You can get a lot of control over rotation doing it this way though. The flange bolt on the nose of the hub is tempting to put a wrench on and turn it. If this bolt breaks for some reason, its a pain in the butt to extract. I'm not sure my way is any better, but its worked for me. Zach |
930cabman |
May 22 2021, 05:46 PM
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#17
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Advanced Member Group: Members Posts: 3,803 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
I ended up installing the alternator with associated tin. The engine can easily be moved in small increments with a crescent wrench on the alternator pulley nut, clockwise of course.
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Spoke |
May 23 2021, 07:14 AM
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#18
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Jerry Group: Members Posts: 7,107 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Use a 13mm socket on an extension in the center of the fan. Or just reach down and grab the fan pulley and turn. If the plugs are out and it is in neutral it should be easy to turn that way. Clay The engine is on the test bench (and runs), I am not happy with the hex rod twin Weber linkage setup, but looking to modify or spring for the CSP system when it comes available. I have not tried to turn the 13mm bolt on the fan, but will give it a try Thank you Yes, 4 cylinder If on the test bench, assuming the alternator is attached, use the center bolt of the alternator pulley to turn the engine. |
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