2.8L M20 build - Now with 2.7L!

[JeremyE30autox]

Well that sucks hard

[Bearmw]

That sucks. Did you verify oil pressure upon initial start up? Curious as to what happened.

[Cinnabar325is]

Sure sounds like a rod knock in that video. Sorry to hear this, something clearly wasn't right.

[acolella76]

Well not really sure what to say.. I wish I knew what caused it? Haha. I looked at the oil and there are no metal shavings thankfully, however there are a few very very tiny flakes. Imagine looking at cosmos schwarz metallic paint. That is what my oil looks like. I've heard that this is normal for a recently rebuilt engine but can anyone confirm this?

[MR 325]

Clearances and machine work are very important things. Sorry to hear.

[acolella76]

Go figure. Still not entirely convinced that my rods are fucked. Wouldn't it still be able to start and run if that was the case? It won't even start now, just kind of stutters like it's not getting any gas.

[Chruby99]

ouch hope it is not as bad as it looks

[The Humjet]

Sorry to hear mate. I think the only thing you can do is pull that motor out and get it onto an engine stand and start by pulling off that sump. This thread was going so good its a real shame its come to this :(

[MR 325]

Go figure. Still not entirely convinced that my rods are fucked. Wouldn't it still be able to start and run if that was the case? It won't even start now, just kind of stutters like it's not getting any gas.

I'm willing to bet piston to crank contact.

[acolella76]

I'm willing to bet piston to crank contact.

Oh? Even though my pistons cleared the crank just fine?

[Myster-E]

You will still have to have a minimum gap of .080-.01" between the piston and the crank due to the expanding and stretching of the rod and pistons.

[acolella76]

Yeah, just wondering, what makes you think the clearance was too tight? That is kind of a bold claim to look at a picture of a piston and crank separately and say that they are too close

[Myster-E]

I'm not talking about any pictures. The engine sounded fine at idle but when you put it under load rods and pistons stretch making contact between the pistons and crank.

[Cinnabar325is]

Do you know the distance between your piston skirts and counterweights at BDC? How close were they?

I know mine were darn close, I actually had to do a bit of file work to the skirts (less than ideal I know) to ensure they wouldn't contact.

[Myster-E]

Do you know the distance between your piston skirts and counterweights at BDC? How close were they?

I know mine were darn close, I actually had to do a bit of file work to the skirts (less than ideal I know) to ensure they wouldn't contact.

The distance between the crank and pistons at BDC is about .10".