Cox 045 power pak engine

Hi everyone Im currently restoring a cox thimble drome special with the 045 power pak engine I need a bit of advice on two problems I have 1 what is the best way to unfreeze an engine I currently have it soaking in isopropyl alcohol to get rid of the baked on castor oil and number 2 the engine looks like it's been apart before there is only one Reed valve in situ when there should be two is there a replacement Reed valve I can use or is there a Reed valve that fits the 045 off another engine ??

Any guidance would be a great help
Thanks

Graham

It looks like a Space bug /Jr. reed set have you looked at the breakdown ?
https://drive.google.com/file/d/1B6bSvican1D-l6EnFDQXkRClxGeA-Pus/view Have you got the engine rear end out of the car ? And it will run OK on just one reed and Yes there hard to find but not impossible .