Topic: 68 289 engine back plate

[ruppstang]

Today I removed the back plate from a 52K 68 Mustang with a C code 289 built in May of 68. I have not see this seal glued on the back plate to seal the block before. Maybe it just has been gone on other engines I have worked on.
Another unusual thing I found the oil pressure sender extension was made of aluminum not steal and plated as I have seen before.

[CharlesTurner]

The back plate is normal, I have seen the seal many times and the fading of paint to the starter hole area.

[ruppstang]

Thanks Charles

[J_Speegle]

+1

For others the outer edge along the top and sides will have engine color also though difficult to see in the picture. The paint on the bottom section is from painting the oil pan (plate was attached/held to the back side of the engine when it was being painted) while the bare surfaces (not masked on these engines) around the starter attachment point, assure a good ground for its operation

Believe the glue was there hold a gasket (foam in type) that rarely survives after all these years. How much glue and how neat or not so neat depended on the worker

What is interesting is that the glue is not found on all small block engine plate applications or at least not all the way around the crank opening  while on other examples we can find remaining evidence of a round gasket around the hole in some sections but not in all  (engine paint on the metal surface)

Might there be (haven't checked and compared just thinking about the possibility) is this a manual verses automatic application difference?



68 J code automatic example from my collection. No adhesive wipe but gasket and paint to lower edge





69 302 manual trans example. Paint stops short of lower edge (crank opening) and adhesive wipe

[67gtasanjose]

Off topic perhaps, but what years were known to do this?

[J_Speegle]

Off topic perhaps, but what years were known to do this?

No problem since I left this in the general area hoping that it would expand and cover what we understand was a practice for all plants and engine types through the classic years at least.

You can make the detail out in many of the pictures from the factories shown in that section of the site.

[ruppstang]

I have done mostly automatic cars and have not seen the glued on seal on them. Got me thinking maybe its purpose was to insure no oil got on the clutch assembly. Just a thought.

[Scott302]

According to the parts books it shows as C4OZ-6424-A and is used, starting in 64 through 72, on manual transmissions with V8 small blocks including 351C but not 400. It was used 73-74 on 302 & 351C cars.
Regards,
Scott