351w Timing
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Mountain Pass
Joined: Jun 2016
Posts: 249
Likes: 6
From: 94' F-250 460 4x4 e4od
351w Timing
I finally got around to replacing the heads on my 97 F-250 351w. When I had the heads off (since the engine was sitting for a while) I worked some MMO through the cylinders. I did this with the distributor out, which is the problem. I did put piston #1 back to TDC, but it must have been on the wrong stroke. When I turn the engine over i either get puffs of smoke out the intake or bursts of flame out of the exhaust manifolds. A timing light is not affective given the speed the engine spins at when cranking. How do I reset the timing properly?
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Remove plug #1(front pass side). Roll engine over by hand with your finger over the open plug hole. When you feel a WOOSH of air pushing out, slowly rotate it til the pistion is at TDC. Watch the timing mark on the balancer. That is TDC compression stroke. Remove cap and see if rotor is pointing at #1 wire. Remove distributor and install so rotor is aligned. It should start easy enough to then time with a light once you remove the timing spout connector.
Lead Driver
Joined: Jan 2019
Posts: 5,068
Likes: 863
From: N.W. Alabama
like Freightrain said just try to plug the hole with your finger/thumb(small hands) you will feel it build pressure and try to push your finger off, and thats when you hear the WOOSH, when you pull cap, rotor could be pointing anywhere, if your getting flames out exhaust
More Turbo
Joined: Apr 2018
Posts: 729
Likes: 59
From: pine city washington
that whoosh could be exhaust as well the best wat is to remove the valve cover and go for valve overlap when both valves are closed and run a pencil or a long stick into the sparkplug hole and judge when the piston is on tdc then back it off 12 degrees and drop the dist in pointing at no.1
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oscarguzzi
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
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Jan 29, 2009 04:01 PM
