I have read countless threads about the problems people have had with Tahoes and Yukons losing power and getting the shimmy/shakes or bucking when on slight inclines. It seems to be most prevalent when pulling a boat or trailer of some sort. This is true in my case anyway.
I have put remanufactured heads on my 1999 Yukon 5.7l vortec and , of course replaced the head gaskets and the intake manifold gasket. It didn't fix the problem a year or so ago so I put new head gaskets and intake manifold gaskets a second time with less than 5000 miles on the first set.
I have no oil in my water and no water in my oil. I am losing about 4 ounces of antifreeze every 250 miles or so. The engine has a slight miss at idle but that sometimes disappears when accelerating. When pulling my boat, particularly up a bridge the engine starts missing terribly. That goes away too if I accelerate aggressively and kick in much higher RPMS.
I have read a ton of differing solutions other people have found but they are often very different solutions. I am frustrated to the point of selling this thing and starting over. I use it only to pull my boat but I need it to be reliable for 4 and 5 hour road trips.
My opinion, which is pretty much useless at this point is that the intake manifold gasket still leaks and that it must only be leaking internally. I tried giving it the starter fluid spray test around the intake manifold but heard no difference in the misses it Has at idle. That's another reason I think it is leaking water internally.
I think I was very thorough installing the second set of gaskets so I don't understand why it would still be leaking.
Any thoughts would be tremendously appreciated.
RonC
I have put remanufactured heads on my 1999 Yukon 5.7l vortec and , of course replaced the head gaskets and the intake manifold gasket. It didn't fix the problem a year or so ago so I put new head gaskets and intake manifold gaskets a second time with less than 5000 miles on the first set.
I have no oil in my water and no water in my oil. I am losing about 4 ounces of antifreeze every 250 miles or so. The engine has a slight miss at idle but that sometimes disappears when accelerating. When pulling my boat, particularly up a bridge the engine starts missing terribly. That goes away too if I accelerate aggressively and kick in much higher RPMS.
I have read a ton of differing solutions other people have found but they are often very different solutions. I am frustrated to the point of selling this thing and starting over. I use it only to pull my boat but I need it to be reliable for 4 and 5 hour road trips.
My opinion, which is pretty much useless at this point is that the intake manifold gasket still leaks and that it must only be leaking internally. I tried giving it the starter fluid spray test around the intake manifold but heard no difference in the misses it Has at idle. That's another reason I think it is leaking water internally.
I think I was very thorough installing the second set of gaskets so I don't understand why it would still be leaking.
Any thoughts would be tremendously appreciated.
RonC
