Alright, confession time. Remember back in December when I did the timing chain on the Supervibe and decided to just slap a head gasket in it since I was in the neighborhood? Well, it didn't survive.
After I got it all back together everything seemed fine. I ran it for a couple thousand miles and it was due for an oil change. I had another car apart on my hoist at the time so I just slid under the front bumper and did the oil change on the ground. Ran another 5,000 miles and did the same thing. Everything looked good except my overflow reservoir was a couple cups low. I looked around and saw that my radiator was leaking.
It was the only thing I could see but didn't look bad enough to explain the coolant loss. Ordered up a new radiator as well as a pair of front axles. Kept an eye on the coolant level and just ran it. Figured I'd do the radiator and axles at the next oil change.
Fast forward to a couple weeks ago.
I racked it and raised it up enough to dump the coolant and R&R the radiator. Then raised it up to dump the oil and slam the axles in it. And that's when I saw it...
Sunnuvabish!!!
It never left a drip on the ground and I never even smelled hot coolant. It just oozed out the back and dried on the back of the block and transfer case. Finished my oil change, swapped axle, and rotated the tires. I put it on the light duty roster and ordered another gasket set.
So, Friday I jumped in.
I was really hoping to find a smoking gun but saw nothing definitive. Original gasket was MLS, as was the one I put in 3 months ago. New head bolts. I cleaned the surfaces with a carbide faced hand scraper -- no Roloc on an angle grinder shenanigans. Block and head are both flat. The leakage was external and there was no indication that it was burning any coolant. Not sure why it (I) failed, but it (I) did. It was all self-inflicted. If I'd just left the original head gasket alone, all of this could have been avoided. This time I ordered a composite graphite gasket. Figured it might be more forgiving. Hoping to get more than 15,000 miles out of the new one.
While it was apart, I decided to check my exhaust screen. Sure enough, it was restricted. Outlet side looked okay but inlet side (viewed through O2 sensor hole and backlit) showed 90%+ obstruction. Guess that might explain why she huffs and puffs on some of the long steep hills.
I cleaned the screen.
It's all back together now. I suppose the intermittent P0420 its tossed for the last 100k will be a little more reagular. Hopefully this hassle is behind me now. I'm starting to question the status of our relationship.
Now, back to cutting trees and building fences.