Slightly blue exhaust !!!!!!

Ring damage :

Edited by 1958 rambler super - Feb/04/2023 at 8:57pm

The plugs looked black and wet last time I checked them, so from what ive read that's signs of oil. 

Edited by 1958 rambler super - Feb/05/2023 at 1:56am

Idle is the worst thing to do on a rebuilt engine.

Edited by Trader - Feb/05/2023 at 7:17am

This is from the internet, I never knew about glazing or that idle was bad for a rebuilt engine, I never knew that.... 

"Problems can occur when the engine is lightly loaded or idled for long periods after the first startup. Never idle a brand new engine for an hour with no load.. 

Doing so can create a glazed cylinder wall.

Glazing is essentially combusted oil residue and carbon that remains on the cylinder wall and eventually builds up to a wet, shiny look on the cylinder wall. It almost looks like the cylinder wall has been painted with a clear paint job, Jones said. This finish occurs when the oil fills in all those valleys, creating a very smooth surface on the cylinder wall because no load was applied to peel the oil off of the wall.

This glazing makes the job of removing oil from the cylinder wall nearly impossible. The buildup will continue and eventually you will likely see a bluish haze coming from the exhaust."

I had my engine rebuilt, it cost almost $5000, I got it broken in with the 20 min break in about two months after I installed it, and then I fired up the engine and let it sit at idle and maybe reved it up a tiny bit here or there, but let it sit at idle for a few minutes, sometimes five minutes or more, every couple weeks for more then a year.

I had no idea I shouldn't be doing that.

Purple gremlin, the plugs last time I had them in hand looked oily and wet.

I guess I should still do a leak down test anyways.

If I had to rebuild the engine again like trad suggested, what parts should I replace? If it's all new and not seen much use at all, which parts could I re use? 

Edited by 1958 rambler super - Feb/05/2023 at 11:27am

You will get fouled plugs and some blue smoke for the first 300-500 miles of driving. I drove a rebuilt engine around town just enough to know it was running good (after breaking in the cam!). Pulled and cleaned all the plugs (they were black and wet), then drove it on a short trip -- about 200 miles (four hours away to my parent's house at the time). I had to pull and clean the plugs shortly after I got there. It ran okay, but I knew they'd foul again. When I went back home (another ~200 miles/four hours) and checked they were fouled again. This time I threw them away and put new plugs in. Drove it a bit for the next 2-3 weeks (it was my daily driver, but only about five miles each way to work). Pulled the plugs just to check them. A little fouling, but in general ok, so a clean and put back in. A few weeks later I checked again and they were good, normal slightly tan color. I put at least 500 miles, probably closer to 600, before they were good -- and that was with electronic ignition and a hot spark (4.0L). So don't get worried about a bit of smoke and fouled plugs until you've put at least 500 miles on it. Not just little short trips, but some an hour or more. Not just putting around town either. You don't want to run a fresh engine at constant speeds or real high speeds for long periods, vary engine speed (rpm, not necessarily mph) during this first 500-1000 miles of driving. But it needs to be driven more or less like you intend to drive once it's broken in, and some longish trips help.