I have a 1995 Blazer with the 4.3 with 210,000 miles. I had a new intake gasket put on a few months ago. It ran fine for a month.
Now I have oil leaking into the Anti freeze but the reverse doesnt seem to be happening. There is also power loss. There is no white smoke coming from the exhaust. The oil doesnt seem milky & the level hasnt gone up.
Is this a head gasket problem? Thanks, drkaleb

 

I'm dealing with this on my 1997 with 150K. I am debating if I need a new head gasket because I'm loosing antifreeze, but my dipstick looks fine. I've lost no power, but don't want to drive the think into the ground through ignorance, nor do i want to put lots of money into an engine that might die soon.

 

Check the intake manifold gasket.

You may have a bad radiator. This could also be a bad oil cooler if your model has one.

Worst case, you have a cracked head or block. But as always start with the easier stuff first.

 

Just a follow up, but pheaton called it, it was a cracked radiator. Much better than a cracked head/block. Thanks for bringing it up to my attention!

 

Ok I will check the manifold gasket but can that cause power loss just like the head gasket?