327 Lower Dipstick Tube ?

[Peter Ansted - #32760]

I just snaked out a 10 inch flanged hollow tube from the access hole for the upper dipstick tube. I am clueless as to the use of this lower tube and it's installation relative to the upper tube. Any info is always greatly appreciated.

[Jack H.]

Re: 327 Lower Dipstick Tube ?

Lower tubes were used in a number of Corvette pan applications to prevent dip stick from moving/rubbing against cam shaft.

[Jack layton #896]

Re: 327 Lower Dipstick Tube ?

How about "crankshaft" there, buddy? Cam is top side a few inches.
My 1965 327/300 has one of these lower tubes.

[Brandon K.]

Re: 327 Lower Dipstick Tube ?

So, does it hurt the engine if it doesnt have a lower tube? ('67 327 L-79)

How do you install the tube--from the top or do you have to drop the oil pan?

thanks! Brandon

[Jack H.]

We type too fast sometimes.... Thanks! *NM*

[Mark Ring]

Re: 327 Lower Dipstick Tube ?

Peter, no biggie. They came on all the engines I have ever torn down. They just drop or tap in from the top before the upper dipstick tube is pressed in. Just as simple as that. The gunk sometimes makes them hard to get out but they should go in without a hitch. No disasembly required if the upper tube is already out.
-Mark.

[Joe L.]

Re: 327 Lower Dipstick Tube ?

Peter------

Yes, as others have indicated, the lower dipstick tube was used on all 1956-79 Corvette small block engines as well as most other Chevrolet small block engines. This tube is still available from GM under GM #3951600.