Anyone have their engine out?, Need a dimension or two... Options

[tomeric914]

If you have the engine out AND the clutch and flywheel are still installed, please pull out your dial or digital caliper and take a couple of dimensions and post them up here. I'm curious if the measurements will be consistent or all over the place.

Mainly looking for stock 4 or 6 cylinder engines.

Lay a straight edge across the middle of the pressure plate and measure between the transmission mounting surface and straight edge:



Then measure between the straight edge and clutch fingers where the throwout bearing contacts them.



Thank you! (IMG:style_emoticons/default/beer.gif)

[TRP]

That's kind of a personal question...

(I have nothing of value to add...)

[bdstone914]

@tomeric914

' date='Nov 19 2025, 03:04 PM' post='3233422']
If you have the engine out AND the clutch and flywheel are still installed, please pull out your dial or digital caliper and take a couple of dimensions and post them up here. I'm curious if the measurements will be consistent or all over the place.

Mainly looking for stock 4 or 6 cylinder engines.

Lay a straight edge across the middle of the pressure plate and measure between the transmission mounting surface and straight edge:



Then measure between the straight edge and clutch fingers where the throwout bearing contacts them.



Thank you! (IMG:style_emoticons/default/beer.gif)
[/quote]


It is going to vary if the flywheel has been machined. The surface where the pressure rest should be machined down as much as the friction was machined.
Why are you asking? I would have to look it up but I think the machining limit is about .060".

The distance from the top surface to the block should be closer only affected by the total thickness of the shim pack. That should be less than .010".

[tomeric914]

It is going to vary if the flywheel has been machined. The surface where the pressure rest should be machined down as much as the friction was machined.
Why are you asking? I would have to look it up but I think the machining limit is about .060".

The distance from the top surface to the block should be closer only affected by the total thickness of the shim pack. That should be less than .010".

I agree that resurfacing as well as the shim pack under the flywheel will affect the distance measured.

It's more curiosity at this point.

[tomeric914]

This curiosity started when I discovered the throwout arm was hitting the case. I thought that maybe the pivot bushing had failed, so I removed the engine and inspected everything.

- Pivot bushing looked great
- Clutch looks like new
- Pressure plate surface still has visible machining marks in it

What's amazing is that the clutch has been in the car for the past 15 years, driven at MANY track events, survived One Lap of America as well as street driving.

The clutch cable has always had a stack of washers on it to get t to adjust right. The cable was new 15 years ago. So, ok, the cable has likely stretched, but that does not explain the fork hitting the case.

Then looking closer I realized that there is no clutch stop on the pedal board. I never thought about it because it's never been on the car BUT that clutch pedal stop prevents overtravel on the pressure plate. My guess is that I'm not the only one and that many DAPO's have removed it to "adjust the clutch" instead of climbing under the car and adjusting the cable.

(A proper clutch adjustment involves both adjusting the cable and the clutch pedal stop)

Looking at my pressure plate, it does not appear to be damaged, but it only take a few thousandths of an inch. If someone has their engine out, I would be curious what their measurement is to compare to mine. It may solve a Scooby Doo mystery!