Yes they were saved, by a future act of Christ, which relied on their faith. We still technically are not fully saved (redeemed), until the transformation of our bodies at the second coming of Christ.
Sorry if this is too long. Read I Cor. 15 and Heb. 11 1 Thess. 4:13-17 When Christ died and rose again. He paid for all the sins of the past, present, and future. That includes us. They knew about the Messiah that was to come. Isaiah 53 mentions him. In fact, he visited with Abraham in the heat of the day, with Job in the whirlwind etc. It also mentions Melchizedek in Hebrews (like unto the son of God)
1 Peter 4:5  Who shall give account to him that is ready to judge the quick(living) and the dead.
6  For for this cause was the gospel preached also to them THAT ARE DEAD, that they might be judged according to men in the flesh, but live according to God in the spirit.
It appears after Christ rose that He preached to the saints. I admit that is not much to go on for a doctrine.I can't see it meaning the atonement of Christ (the gospel) was taught to the Hebrews...because they believed in a delivering Messiah? Maybe it was though? Isa. 53?? They definitely knew about the Messiah though, and they were taught that the life is in the blood (animal sacrifice)... If they knew fully about the redeeming work of Christ through the cross, I don't think they would have practiced animal sacrifice. They looked for a city, whose builder and maker is God. Hebrews 9:11  But Christ being come an high priest of good things to come, by a greater and more perfect tabernacle, not made with hands, that is to say, not of this building;12  Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.
Hebrews 11:13 These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth.
14  For they that say such things declare plainly that they seek a country.
15  And truly, if they had been mindful of that country from whence they came out, they might have had opportunity to have returned.
16  But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city.
Hebrews 11:39  And these all, having obtained a good report through faith, received not the promise:40  God having provided some better thing for us, that they without us should not be made perfect.
The price has been paid for them and us, when Christ offered himself ONCE and for ALL.
1 Corinthians 15:20  ¶But now is Christ risen from the dead, and become the firstfruits of them that slept.
21  For since by man came death, by man came also the resurrection of the dead.
22  For as in Adam ALL die, even so IN Christ shall ALL be made alive.
23  But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming.