How worn is my engine

Made some videos of a cold start and hot idle of my 96 OBS.

Wondering what your opinions are on the condition of my engine. I bring this up because it seemed to get sluggish, but then got fuel elsewhere and she perked back up, but anyways here's some vids of it.

Thank You

http://youtu.be/XQYWGg1dhDo

http://youtu.be/L40Prl6TjAw

real way to tell would be to run a compression test

Odds are that the engine itself is fine but other components may be on their way out.

I have seen these engines with 500K+ miles on them with no internal problems but injectors, and other things just don't last as long as the engine itself.

DevC said:

Made some videos of a cold start and hot idle of my 96 OBS.

Wondering what your opinions are on the condition of my engine. I bring this up because it seemed to get sluggish, but then got fuel elsewhere and she perked back up, but anyways here's some vids of it.

Thank You

http://youtu.be/XQYWGg1dhDo

http://youtu.be/L40Prl6TjAw

Click to expand...

how many miles?

That is a lot of blowby. I'd run a compression test before investing a whole lot in that engine.

Got to agree with Dave on that one. Lot so blowby and not running on all 8.

Thanks guys, I picked up a compression tester, just need to find time, it has about 179,000 miles, I'll report back with test results. And maybe do a cranking test, I have a hunch one cylinder may be low. Power wise it still does what I need it to do though, just trying to assess how long it will hold together.

WHS, that is a ton of blowby, looks like it will start lifting the oil cap off soon. Depending on what you want to do with the truck I would plan a motor swap in the future if your going to keep the truck.

Yep that looks like a lot. My 96 with 195k miles doesn't have even a trace of blow by.

That is quit a bit there brother, are you losing any oil?

Yeah, using a bit of oil, leaking a bit too. I do have it running much better then when I bought it a year ago, but still not 100%.

Jeez I better check mine again cause I think mine had about the same amount of blow by when hot. I have 167k on mine and it runs great.

I swear I'm going to get around to a compression test soon.

Do a compression test. I've seen less blowby with low numbers and more blowby with high numbers. The filler cap test only tells you if you have blowby IMHO. Doesn't really tell you much of anything else. You also have a cel when it runs rough. What's the code. What's the fuel pressure when it runs rough.


Nick
2004 NR Commander 21'
5.7 kodiak Hamilton pump
1997 f-350 cclb zf5 160/80, t500, diy bellowed up pipes, 6.0 ic, 38r, diy e-fuel, isspro gauges

From the sound of the first video, and the blowby in the second video.

I agree, first step is a compression test. It sounds like you also have a intermittent injector also.

Just a hypothetical question. If you have blow by but good compression numbers does that mean your engine is still worn?

OBS-Addiction97 said:

Just a hypothetical question. If you have blow by but good compression numbers does that mean your engine is still worn?

Click to expand...

unless an engine is running a dry sump oil system..it will have some level of blow by.

golfer said:

unless an engine is running a dry sump oil system..it will have some level of blow by.

Click to expand...

Poor choice of words on my part. How about excessive blow by?

Then either your compression tester gauge is not calibrated

or whatever your subjective opinion of 'excessive' blow by is significantly different from others


Sent from my DynaTAC

Also hypothetical and far fetched. But couldn't a loose glowplug, bad injector washer, valve seat/guide also show high blowby?

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