Made sense to me, he's basically saying they would be Ass-raping you with a red shop rag, without lube (I'm assuming so since he didn't mention it). This being a metaphor of course, meaning that they screw you out of your money while not fixing your car at all.
I'm thinking he is:
A.) and idiot...ask him some VERY novice questions to find out what he knows
Ask something like "Which vacuum line was the coolant leaking in to?" If he answers with ANYTHING other than "Well, it wasn't really a single vacuum line, it was leaking into the intake runner before the air\gas mixtures went into the cylinder." Or something like that, he is a retard. Also, ask to see the old gaskets so he can show you where they were leaking. Then ask him what the new gaskets were made out of...if he says plastic...punch him in the throat. Then ask him if he put Dexcool in your engine. If he did, put your keys in your hand and punch him in the throat again. twice.
B.) Keep in mind I mean no offense by this at all, seriously, I don't. He might have been dumbing it down for you if he thought you didn't know anything (or much) about cars. Asking him the above questions well help him realize he needs to stop that B.S. with you and tell you the truth, using the correct terminology.
