 Can I manually crank my 1974 914 2.0 engine? |
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| Seth Johns |
 Jan 10 2019, 08:30 PM
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#1
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Newbie  Group: Members Posts: 5 Joined: 31-May 18 From: Southern Oregon Member No.: 22,175 Region Association: Pacific Northwest  |
Can I manually crank my 1974 914 2.0 engine?
I have the engine and drive train on the bench and want to confirm it is not seized up. If I remove the spark plugs, how can I turn it over without using the starter? |
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| mgphoto |
Jan 10 2019, 08:35 PM
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#2
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"If there is a mistake it will find me" Group: Members Posts: 1,335 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
With the plugs out, loosen the alternator belt, spin the fan...
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| Seth Johns |
Jan 11 2019, 02:02 AM
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#3
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Newbie Group: Members Posts: 5 Joined: 31-May 18 From: Southern Oregon Member No.: 22,175 Region Association: Pacific Northwest |
QUOTE(mgphoto @ Jan 10 2019, 06:35 PM)  With the plugs out, loosen the alternator belt, spin the fan... Thanks, I will give it a try tomorrow. |
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| Seth Johns |
Jan 11 2019, 02:03 AM
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#4
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Newbie Group: Members Posts: 5 Joined: 31-May 18 From: Southern Oregon Member No.: 22,175 Region Association: Pacific Northwest |
QUOTE(mgphoto @ Jan 10 2019, 06:35 PM) With the plugs out, loosen the alternator belt, spin the fan... Thanks, I will give it a try tomorrow. |
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| falcor75 |
Jan 11 2019, 04:54 AM
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#5
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia 
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Just be carefull when you grab the fan, the fan blades can be quite brittle. Dont use them for leverage.
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| bdstone914 |
Jan 11 2019, 04:57 AM
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#6
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bdstone914 Group: Members Posts: 4,508 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(Seth Johns @ Jan 10 2019, 08:30 PM) Can I manually crank my 1974 914 2.0 engine? I have the engine and drive train on the bench and want to confirm it is not seized up. If I remove the spark plugs, how can I turn it over without using the starter? You should be able to turn it by rhe flywheel with the spark plugs it. Bruce |
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| Chi-town |
Jan 11 2019, 09:28 AM
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#7
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Senior Member Group: Members Posts: 850 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
Put 12 volts to the starter. If the starter won't crank it, it's frozen.
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| UROpartsman |
Jan 11 2019, 11:13 AM
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#8
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Member Group: Members Posts: 291 Joined: 22-October 15 From: Simi Valley, CA Member No.: 19,288 Region Association: None
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Naturally it depends on the history of that engine (recent mechanical failure or it's been sitting outside for 30 years?), but if there's one or more seized pistons and you use the starter, there's a chance a rod could bend, just like if a cylinder had water in it. Use Bruce or Mgphoto's advice just to be safe.
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| Seth Johns |
Jan 11 2019, 02:12 PM
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#9
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Newbie Group: Members Posts: 5 Joined: 31-May 18 From: Southern Oregon Member No.: 22,175 Region Association: Pacific Northwest |
QUOTE(UROpartsman @ Jan 11 2019, 09:13 AM) Naturally it depends on the history of that engine (recent mechanical failure or it's been sitting outside for 30 years?), but if there's one or more seized pistons and you use the starter, there's a chance a rod could bend, just like if a cylinder had water in it. Use Bruce or Mgphoto's advice just to be safe. I know, been there, done that... Thanks for your reply. |
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| jsaum |
Jan 11 2019, 03:07 PM
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#10
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Senior Member Group: Members Posts: 530 Joined: 12-June 07 From: Everett, WA Member No.: 7,809 Region Association: None |
When's the last time the engine ran? Has it been sitting long? If it is froze up and hasn't been sitting long I would try pouring Marvels Mystery Oil down the plug holes and let it soak for a few days then see if you can free it up. If not pull the heads and see what you got going on in there.
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| stugray |
Jan 12 2019, 04:39 PM
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#11
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
If you have a couple pieces of pipe, rebar, etc: Put two of the old CV joint bolts (ones you will throw out) into both hubs on the trans. Put the trans in 5th. Put one piece of pipe in one side of the trans so it jams against the workbench.
Turn the opposite side with another piece of pipe and this will turn the engine. |
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| ClayPerrine |
Jan 12 2019, 05:49 PM
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#12
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Life's been good to me so far..... Group: Admin Posts: 15,394 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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KISS (Keep It Simple Stupid)
Take a 13mm socket, put it on the end of a 8 inch extension. Use a long ratchet and turn the bolt in the middle of the fan like you are tightening it. If it is not frozen, it will turn the engine. |
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| Seth Johns |
Jan 12 2019, 08:08 PM
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#13
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Newbie Group: Members Posts: 5 Joined: 31-May 18 From: Southern Oregon Member No.: 22,175 Region Association: Pacific Northwest |
Nailed!
Turns over easily, no bbroken fan blades. Next is bench testing. All comments on the best set up and procedures are welcome. Cheers! |
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