Crank engine by hand?
Thread Starter
Instructor
Joined: Jun 2017
Posts: 101
Likes: 17
From: Bay area Ca
Crank engine by hand?
Quick question. When I replaced the headgasket on my Prius. I turned the engine over multiple times with the crank bolt getting TDC. And never even thought twice about the bolt possibly being able to break.
but I came across a post asking this same question about a ls2. And people seemed to think the bolt could snap. Or the threads could get screwed up.
so I’m curious. What methods have you guys used on the LS motors. To turn it over? Is the bolt breaking a big possibility/concern?
(all plugs out btw)
but I came across a post asking this same question about a ls2. And people seemed to think the bolt could snap. Or the threads could get screwed up.
so I’m curious. What methods have you guys used on the LS motors. To turn it over? Is the bolt breaking a big possibility/concern?
(all plugs out btw)
Drifting
Joined: Apr 2016
Posts: 1,286
Likes: 611
From: DFW Texas
The instructions for changing the LS harmonic balancer always state to put a manual in gear or an automatic with a flywheel locking pawl in place of the starter to be able to torque the bolt without turning over the engine. This would indicate that the engine will turnover before reaching the torque-spec of the bolt. The bolt shouldn't break until reaching torque values that exceed this spec, so feel free to manually turnover your engine.
If you have a manual, just be sure it's not in gear.
GD
If you have a manual, just be sure it's not in gear.
GD
Last edited by gdmoore01; May 21, 2021 at 11:12 AM.
Le Mans Master
Joined: Dec 2004
Posts: 5,493
Likes: 808
From: West coast CA
Quick question. When I replaced the headgasket on my Prius. I turned the engine over multiple times with the crank bolt getting TDC. And never even thought twice about the bolt possibly being able to break.
but I came across a post asking this same question about a ls2. And people seemed to think the bolt could snap. Or the threads could get screwed up.
so I’m curious. What methods have you guys used on the LS motors. To turn it over? Is the bolt breaking a big possibility/concern?
(all plugs out btw)
but I came across a post asking this same question about a ls2. And people seemed to think the bolt could snap. Or the threads could get screwed up.
so I’m curious. What methods have you guys used on the LS motors. To turn it over? Is the bolt breaking a big possibility/concern?
(all plugs out btw)
Actually getting to the bolt with the steering rack in the way is another story.
Safety Car
Joined: Aug 2017
Posts: 4,929
Likes: 2,340
From: Etobicoke (Toronto) Ontario
I've had no reason to try this on my LS3, but in the past it was easy to spin an engine with the plugs out by putting a ratchet on the alternator pully nut. I figured the pully would slip before the belt broke or stretched in any case. A couple of times, I just pulled up on the belt and that worked too if I only wanted to turn the crank a few degrees.
