TDC Gauge ???

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wildcard
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TDC Gauge ???

Postby wildcard » Fri Sep 26, 2014 8:36 pm

I'm wanting to get a tool to help find TDC easier. I'm thinking I have seen one that screws into the spark plug hole and has a gauge attached. There has to be a better way than putting a dowel rod through the plug hole and turning the crank.
Can anyone help me on this? I guess I'm mainly looking for the technical name of such a tool if there is one. :?
Thanks,
Benny

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Calfdemon
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Re: TDC Gauge ???

Postby Calfdemon » Fri Sep 26, 2014 11:02 pm

I believe it is actually called a "top dead center gauge". Are you talking about something like one of these?

http://www.summitracing.com/parts/pow-p ... AsFt8P8HAQ
http://www.summitracing.com/parts/ipa-7 ... AmH58P8HAQ
-Rich

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wildcard
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Re: TDC Gauge ???

Postby wildcard » Sat Sep 27, 2014 7:08 am

Thanks Calfdemon.
I think the 2nd one is more like what I'm looking for.
I'm planning to try to adjust some valves next weekend, hopefully. And also check to be sure that my timing mark lines up at 0.
Thanks again.
Benny

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trozei
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Re: TDC Gauge ???

Postby trozei » Wed Nov 19, 2014 3:43 am

The street name for a TDC gauge is a piston stop.
Jackson

1969 Ford F100 300 C4 // 1973 Ford F100 Ranger 360 C6 // 2004 Ford F150 FX4 5.4L // 1995 BMW 525i

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wildcard
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Re: TDC Gauge ???

Postby wildcard » Wed Nov 19, 2014 5:39 am

OK. I see you're from B.C. :) . Just curious as to whether that applies to the U.S. as well, since I've never heard that term used. :?

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trozei
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Re: TDC Gauge ???

Postby trozei » Wed Nov 19, 2014 9:21 am

Anytime I go online and see someone mention it, they call it a piston stop so yeah I'd say it's a pretty universal term.
Jackson

1969 Ford F100 300 C4 // 1973 Ford F100 Ranger 360 C6 // 2004 Ford F150 FX4 5.4L // 1995 BMW 525i

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duaneo
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Re: TDC Gauge ???

Postby duaneo » Wed Nov 19, 2014 3:24 pm

I know that my harmonic balancer is installed correctly, so every other rotation, 0 lined up with the marker on the timing chain cover is TDC.

Instead of a TDC gauge, I use a compression gauge. I put the gauge in the #1 spark plug hole. To find TDC, I turn the engine over, watching the gauge, and the harmonic balancer. On the exhaust stroke, the gauge will stay at zero when the 0 comes around on the balancer. On the compression stroke, pressure will rise on the gauge as the 0 comes around. When the pressure is up and the harmonic balancer is at 0, that's TDC.

Unlike a TDC gauge, you can also use a compression gauge to check your compression. ;)

Cheers,
Duane
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