 Wiring / jumping the starter, To turn engine over |
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| Hammy |
 Jun 8 2015, 09:58 PM
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#1
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mr. Wonderful  Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California  |
I've searched but can't find exactly what I'm looking for.
I have a motor (still in the car) that I'm trying to test compression on before I remove it. I have most of the FI/engine wiring harness disconnected so I'm wondering if I can wire up leads from a battery to the starter/solenoid so I can crank the engine over? Is there an easy way to do this? |
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| r_towle |
Jun 8 2015, 10:05 PM
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#2
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Custom Member Group: Members Posts: 24,638 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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You need to hook up the battery, ground and positive.
Large positive goes to large terminal on the starter. Ground could go on the lower bolt of the starter, or just make sure the normal tranny strap is in place. Make up a 30 am starter push button switch and connect on end to the positive terminal of the battery, and the other end is a femal spade bit on the starter solenoid. Press button...off you go. For rapid action, take a screw driver and touch the larger terminal on the starter to the male spade bit on the starter...same results. If Ed was there, he would show you a quarter fits between the spade terminal and the larger on on the starter, same results. Now, your compression test will not really show you much with the engine cold, in fact your results will be worse, so until the rings best up and expand....your compression will suck. |
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| Hammy |
Jun 8 2015, 11:45 PM
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#3
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
QUOTE(r_towle @ Jun 8 2015, 09:05 PM)  You need to hook up the battery, ground and positive. Large positive goes to large terminal on the starter. Ground could go on the lower bolt of the starter, or just make sure the normal tranny strap is in place. Make up a 30 am starter push button switch and connect on end to the positive terminal of the battery, and the other end is a femal spade bit on the starter solenoid. Press button...off you go. For rapid action, take a screw driver and touch the larger terminal on the starter to the male spade bit on the starter...same results. If Ed was there, he would show you a quarter fits between the spade terminal and the larger on on the starter, same results. Now, your compression test will not really show you much with the engine cold, in fact your results will be worse, so until the rings best up and expand....your compression will suck. So Will the screwdriver trick work if I have the starter wired straight to a battery? |
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Posts in this topic
Hammy Wiring / jumping the starter Jun 8 2015, 09:58 PM
Hammy Just to clarify, I've got the engine still in ... Jun 9 2015, 01:43 AM
bulitt It's not pointless, but the readings will be l... Jun 9 2015, 02:17 AM |
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