Had and outside compression leak on #6, I had the same failure 13 years ago. Finished the head gaskets, cranked it up and instant leak. Coolant running down the backside of the block when running. Oil looks fine but I have only run it for a few minutes.

I followed the torque sequence to the letter. Took notes on each bolt during the sequence. Either I pushed out the gasket when laying the head on the block or the head was knocked out of spec when it was machined. Best case is an intake manifold leak but not holding out for that. Pretty sure I’d see coolant on the valley pan gasket.

I installed a different set of heads that I bought from a guy that had them laying around. He didn’t have any history about the motor except that it was running when he got it. I did notice that the motor had Land Rover head gaskets when I pulled them and thought maybe these heads hadn’t been machined. I use the oldest machine shop in Memphis, they come highly recommended by commercial engine builders that I know personally. Surely if they were out of spec they would have let me know.

Going to get an endoscope on the backside of the block in the next few days.

Has anyone lived through this and what were your findings after you dug back in?

 

Posted too soon. Heater core hard line into the intake spewing coolant at the connection to the intake. If that’s the only thing I messed up I’ll take it 1000x over screwing up the head gasket.

sorry for the false alarm.

 

Glad to hear it was a simple fix for you

 

Thanks man

 

I read the title and immediately felt what you must've felt haha.

 

Whew, how great did that feel when you found the leak!!

 

Oh man...

Glad I kept reading. Haha
All my parts for HG came this last week. Tearing into it a week from now. Will double check those two hoses on the back end.

Glad you figured it out.

 

Yeah, I chewed up one, or maybe two of the heater inlet O-rings when I replaced the headgaskets in my truck. P.T. kindly sent me a couple at no cost since I'd bought the kit from him (that's P.T. Schram for you newbies, not Barnum). The part number for the O-ring is ERR6434.

Just use a little lube of some kind on the O-ring when installing the pipe. Even saliva can do the trick. Butter, Vaseline, whatever. Silicone (aka dielectric grease) is arguably best if you are concerned about the lube causing deterioration of the O-ring.

 

Good to know!

Doing my HG this next week. Replacing both of those little hoses as well. Thanks for the tip!

 

Im in the middle of my first Rover HG job right now on my new to me Disco #2.... I found one of the heater core inlets is bent up a bit from an over torqued hose clamp with old hoses....So I completely understand that leak point. Disco #1 is next....can't wait. lol