Determining clutch and flywheel help

[RoccoGilroy]

7 minutes ago, Preyupy said:

They made 6 bolt crankshafts in both the 71mm and 80mm strokes.  Have you checked to make sure you have a 1973 2 liter block?  It is possible it is the small bore 1600 block (however by 1973 even the 1600/1800 cranks were 8 bolt) 

 

Block is stamped with the vin 258650… It’s marked 73 on the passenger side… Vin and stamp lead me to believe it’s a 73… Being that it is no doubt a 6 bolt crank there are only 2 options… They used the 1.6L crank from the original motor… Or they found a 6 bolt 2.0L crank… (which I would imagine are very rare..) 

 

Hypothetically speaking, let’s say it is a 1.6L crank and a 2.0L block… Could such a thing be done? And if so, what would the resulting motor run like? 

[gracer]

6 bolt 2L crankshafts are not that rare.  I have 2 or 3 in my stash.  G

[RoccoGilroy]

7 minutes ago, gracer said:

6 bolt 2L crankshafts are not that rare.  I have 2 or 3 in my stash.  G

I’ve got my fingers crossed…

 

?2.0L 6 bolt crank?

Edited July 28, 2021 by RoccoGilroy

[uai]

5 minutes ago, RoccoGilroy said:

I’ve got my fingers crossed…

 

?2.0L 6 bolt crank?

A 2 Liter would have a 228mm clutch

[Mike Self]

If that 6 bolt flywheel uses a 228mm clutch, it's from a 2002 built before (US) VIN 1665200, as is that pressure plate and of course the six bolt crankshaft, which will fit into a later 2002 block.  The disk is the same as that used with a diaphragm clutch (the type fitted after that VIN) but the throwout bearing is different.

 

If the flywheel takes a 200 mm clutch, then it's from a 1600; according to the factory parts book, all 1600s used the coil spring style pressure plate all the way to the end of 1502 production.  

 

mike

[RoccoGilroy]

2 minutes ago, uai said:

A 2 Liter would have a 228mm clutch

Earlier in this thread it was brought to my attention that that the 2.0L 6 bolt cranks used 228 clutches but were of the spring variety pressure plate. This would land me in the same position I am now. Looking for a NOS spring 228 pressure plate as  (I’m told) the new style pressure plates have a different bolt pattern. 

[Lorin]

16 minutes ago, RoccoGilroy said:

Earlier in this thread it was brought to my attention that that the 2.0L 6 bolt cranks used 228 clutches but were of the spring variety pressure plate. This would land me in the same position I am now. Looking for a NOS spring 228 pressure plate as  (I’m told) the new style pressure plates have a different bolt pattern. 

Can you get the correct throw out bearing for the 5 speed and coil spring clutch? One reason I used the redrilled flywheel was because the throw out bearing was NLA but that might not be true today. 

[RoccoGilroy]

30 minutes ago, Lorin said:

Can you get the correct throw out bearing for the 5 speed and coil spring clutch? One reason I used the redrilled flywheel was because the throw out bearing was NLA but that might not be true today. 

Na, I think your on the right track redrilling for newer clutch. Just makes more sense. No doubt I’ll give that a shot. depending on what it costs to do the work. If it’s close to half of the JBR aluminum flywheel I might just bight the bullet. 
 

I’m just hung up on wondering which crank I have in there… is it even possible that it’s a 1.6L crank in a 2.0L block??? How would that even work? 

[RoccoGilroy]

Maybe I’ll start a new thread on that topic specifically… This is getting a bit long I suspect. 

[Buckeye]

I cannot help you, but i like the pictures you have attached. So clear and bright.

[Preyupy]

23 minutes ago, RoccoGilroy said:

I’m just hung up on wondering which crank I have in there… is it even possible that it’s a 1.6L crank in a 2.0L block??? How would that even work? 

If they used pistons out of the later 1.8l engine it would be easy.  The only difference between the 1.8 and 2.0 pistons is the location of the wrist pin, both engines used the same connecting rods.  They would just need to move the pin down 4.5mm to compensate for the shorter stroke.  

[RoccoGilroy]

Who knows… That all just sounds like a butt load of work… And thinking… Maybe it IS a 2.0L 6 bolt crank, and they just slapped on the old clutch and pressure plate from the 1600…. Oh, to be a fly on the wall when this was built…

[RoccoGilroy]

31 minutes ago, Preyupy said:

If they used pistons out of the later 1.8l engine it would be easy.  The only difference between the 1.8 and 2.0 pistons is the location of the wrist pin, both engines used the same connecting rods.  They would just need to move the pin down 4.5mm to compensate for the shorter stroke.  

So to try to clarify… For my sanity…

 

Situation #1

 

I DO indeed have a 6 bolt 2L crank, and all is well and I just have to sort out the clutch flywheel situation… (easy enough and I have options…)

 

Situation #2

 

i have a 1.6L crank with 1.8L pistons that have been modified to work with the intended stroke… (weird but possible)

 

Would this still Leave me with a 2.0L motor in the end?

 

Situation 3

 

Is there one? Could the 1.6 crank be used without 1.8L pistons? If so WTF??? Lol

 

 

Edited July 29, 2021 by RoccoGilroy

[Mike Self]

16 hours ago, RoccoGilroy said:

I DO indeed have a 6 bolt 2L crank, and all is well and I just have to sort out the clutch flywheel situation… (easy enough and I have options…)

If that is indeed the case and you do have a 6 bolt, two liter crankshaft, those coil spring pressure plates are still available.  Not as easy to find as the later style, but they can be found.  Then all you'd need to determine is whether there's a throwout bearing that's compatible with both the coil spring pressure plate and the 5 speed tranny.  If you do, please post, as my '69 uses this pressure plate (400 numbers before the changeover!) and it would be good to know if I ever install a 5 speed.

 

mike

[Preyupy]

16 hours ago, RoccoGilroy said:

I DO indeed have a 6 bolt 2L crank, and all is well and I just have to sort out the clutch flywheel situation… (easy enough and I have options

This is the most likely possibility 

 

 

16 hours ago, RoccoGilroy said:

i have a 1.6L crank with 1.8L pistons that have been modified to work with the intended stroke… (weird but possible)

Would this still Leave me with a 2.0L motor in the end?

There is no modifying needed with the 1.8l pistons.  They are just what you need if you have a 2L block and a 1600 crankshaft.  This WOULD be an 1800cc engine

 

16 hours ago, RoccoGilroy said:

Is there one? Could the 1.6 crank be used without 1.8L pistons? If so WTF??? Lol

You could use the standard 2L pistons with the 1600cc crankshaft and you would have a 1800cc engine with a compression ratio of about 5.7:1