Montana's back-up engine Question...

Montanaorbust · Post by **Montanaorbust** » Tue Nov 24, 2009 5:53 am

When I put the timing chain on, I noticed something weird. When I started to roll the engine over to double check my timing marks, the intake on No. 1 opened indicating the start of the intake stroke, not the power stroke. So I think that it is really on number 6 TDC, not number 1 TDC. Am I crazy?

MSeriesRebuild · Post by **MSeriesRebuild** » Wed Nov 25, 2009 3:11 pm

If I'm interpreting your post correctly, you are good to go. When the timing marks are aligned next to each other, install the chain. After installation, spin the crank until #1 is at TDC on the compression stroke, the timing sprocket marks will then be 180 degrees apart. Sounds like this is what you have done already, am I making the correct assumption?

Montanaorbust · Post by **Montanaorbust** » Wed Nov 25, 2009 6:48 pm

Thanks.... MSeriesRebuild I am in uncharted territory, this is my first engine overhaul. Its is set up right, i am almost certain. I think I was phycing???(spelling) myself out.

Lifer · Post by **Lifer** » Thu Nov 26, 2009 3:56 am

That would be "psyching," and you probably were.

The timing marks are next to each other when #6 is at TDC on its compression stroke. When the crank is turned 180 degrees (1/2 turn), #1 comes up to TDC on its compression stroke and the timing marks are opposite each other. A straightedge laid across the timing marks should then cross the centers of both the crankshaft and camshaft.

Captnsim · Post by **Captnsim** » Thu Nov 26, 2009 8:36 am

Great info on a procedure many are uncomfortable with.
Funny how most people think engines are all timed on #1 TDC.
Quite a few are not.
Must be from all the Chevy SB's on the road as thats how they do it.

cuz · Post by **cuz** » Thu Nov 26, 2009 10:17 am

That Dodge 6 did it long before Duntov's small block V8 showed up!