1970 Expansion Tank Question

[Greg F.]

I'm looking at 1970 vettes. I've noticed that some have the radiator expansion tank and others do not. 1970 Corvettes with NO A/C are suppose to have it, correct? Can someone explain, please?

Thanks,
Greg

[Joe L.]

Re: 1970 Expansion Tank Question

Greg-----

For 1970, all Corvette big blocks used an external radiator supply tank.

As far as small blocks go, base engine with 4 speed transmission and without C-60 used an external supply tank. Some early 1970 LT-1 may have used an external supply tank. All LT-1/ZR-1 used an external supply tank. All other 1970 small blocks used a radiator with an integral filler and NO external supply tank.

[Greg F.]

Re: 1970 Expansion Tank Question

Thanks Joe. What exactly is an "integral filler"?

Thanks again. The cars I've been looking at are 350/350 4 speeds.

[Terry M.]

Re: 1970 Expansion Tank Question

"radiator with an integral filler" = radiator with a filler hole in the end tank covered by a radiator cap.

BTW: All this information is in the 1970-1972 Technical Information Manual & Judging Guide (TIM&JG) available from the NCRS bookstore --the sponsor of this site. Check out the NCRS store by clicking on the radio button at the top of the page