Genes1s

iTrader: (5)

I did a compression test on my max just to see what they are. Prior to the test, I didn't notice any loss power, no CEL, other than losing about 1 quart oil every oil change (4000 miles). It puffs off a blue smoke in the morning or after sitting for a long period of time. No smoke under hard acceleration. Car gas 197XXX. Original engine and drive train.

This test was a dry test. I wanted do wet test but its getting dark. Remember to release fuel pressure and remove the fuse before you do this (follow FSM).

After 2 readings:

Cyl 1 = 175/170
Cyl 2 = 185/185
Cyl 3 = 170/175
Cyl 4 = 170/175
Cyl 5 = 155/150
Cyl 6 = 180/175

Spark plug tips look light brown on all of them. Other than the gap was a mile long, no oil residue and look pretty clean on all of them.

So, looks like the compression number is good individually, but something going on on #5 for sure. I probably do leak down test to pin point, but my gut tells me it's a worn ring and valve not seating properly.

What do you guys think.

Thanks

maxiiiboy

That's pretty good for a car with 197k miles on the clock. I am sure the oil consumption is annoying you a bit, but let's face it, it's not the end of the world.
My 2000 SE/AT has no measurable oil consumption at 149.2k miles. A recent oil analysis revealed high lead content, suggesting there may be a problem with one of the bearings. Annoying, but I am trying not to loose any sleep over it.

Genes1s

iTrader: (5)

The burning oil isn't that annoying compared to the oil leak from the RMS, Front Crank, upper oil pan, and valve cover. The reason I was doing the test is to see if I need to do more things while I take the engine out of to do the all the seals and clutch replacement.

I'll see what I find from leak down test, although I would probably leave it alone as long as it doesn't leak anymore.