Mine just started leaking antifreeze and the heater does not work consistently. Any thoughts on this? Thanks.

 

You should do a little reading on any of these Rover forums, you would see this is very common and possibility serious depending on where your coolant is leaking from.
What ever you do, fill the coolant completely full, not just to the cold mark, and get it into your mechanic today with few miles being driven so you don't over the engine block because of the air trapped in the upper end of the engine.

 

Thanks. I have been reading that this is a common problem and hascaused engines to be replaced, I'm hoping that is not my case.

 

As long as it has not overheated you will probably just be looking at the cost of the leak repair.
Let us know what they find and their estimate so we might help you.

 

Intake manifold gasket needs to be replaced. 7 hours labor and parts $900 total. Does this sound right?

 

No, it doesn't sound right, how many miles on your truck?
Have you actually seen where it is leaking from, might consider a second option and a coolant pressure test.
My concern is that intake manifold gaskets don't leak coolant, may be a head gasket or valley pan gasket.
Get back to us after you get it check by another shop.

 

Miles are 80k. 2 months ago I had a tune-up at a different shop and they replaced the valve cover gasket and intake plenum gasket.

 

I hope while they had the intake off they replace your plug wires also.
Still, intake gaskets don't leak coolant so go get a second option and make sure you top off your coolant bottle every morning till you get this fixed.