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I personally would pull the pan and have a very close look.
Purge the oil and let it filter through a coffee filter - may take a day. You will know where the shavings went.
Pull the oil pan and inspect on the inside. You will see if there is particles in the sump and the slush.
Pull the oil pump and inspect for damage or wear outside the expected.
And as the bottom is open and you have already pulled the heads - why not just pull the first two mains and inspect and at least the 1 + 2 rod caps to have a look?
I personally would pull the pan and have a very close look.
Purge the oil and let it filter through a coffee filter - may take a day. You will know where the shavings went.
Pull the oil pan and inspect on the inside. You will see if there is particles in the sump and the slush.
Pull the oil pump and inspect for damage or wear outside the expected.
And as the bottom is open and you have already pulled the heads - why not just pull the first two mains and inspect and at least the 1 + 2 rod caps to have a look?
Thats my dilemma right now. i know i should pull the pan and inspect the mains, but to do that i have to pull the engine and put it back on the stand. I have spoke with quite a few guy that work for GM and they have seen this happen way too many times on LS engines. everyone i have spoke with so far says to just throw a cam and lifters in it and go but deep down i know thats wrong.
I think im going to run the oil through a filter like your saying and open up the oil filter to see what it looks like. If they both look ok im just going to run its and see what happens. Luckly these engines are cheap and easy to get another one if needed.
Here's a dyno comparison of the LS7 cam in the LM7 engine with 1.7:1 rockers. No other changes than the cam. Going to have less power under 4500 rpm, but watch out above that RPM!
Peak Power 422 at 6,300 rpm Peak Torque 395 at 5,000 rpm Average HP 300 Average TQ 361 HP/TQ gains (over LM7 cam) at 2,500 -40 lb-ft 3,500 -19 lb-ft 4,500 0 5,500 +51 lb-ft (53 hp) 6,500 +92 lb-ft (115 hp)
I agree a good way to go - step by step. If not happy with what you find in the oil, at least you know.
The Blazer is always a tight fit. Just seen a nice shaved camshaft at my machine shop. Ford 351, solid lifters - wrong oil.
Eaten up to 1/4" from the lifter and the cam. The engine is shot, total rebuild. Particles everywhere.
Good luck that you won't find anything and can continue running it.
Well the oil looked good so im just gona run this engine and see what happens.
I didnt take any pictures while i was assembling it because i just wanted to get her back together.
Still working on tuning it but it runs and idles now
Finally have a good reliable tune in it but i realize now that with this cam it wants a higher stall torque converter. I will probably go with a 3000-3200 stall when i build my other 4L60E trans.
Here is how she accelerates now. https://www.youtube.com/watch?v=ejvw...ature=youtu.be
09-12-2017, 12:01 PM
