ok guys, got a hemi here with a dead miss on #7 cylinder along with a few other cylinders failing a compression test, there has been no leak down test before u ask so i may already know the answer to this question before u guys go to firing off at me lol…..but given theres been no leak down test could i rebuild this motor, or is it safe to say i need to replace it…?

 

Did the engine get hot recently? or any other event occur right before the misfire code?
Cracked head or failed head gasket are also possibilities. I'd also take a borescope to #7 and see if there is any obvious damage or debris.

 

Its likely repairable, but may not be cost effective. You need to find out what is causing the low compression for us to give you any worthwhile opinions.

 

no other issues were at hand when the cylinder started “misfiring”, made sure it wasnt a plug or coil an those were good, so we checked the compression an it was way low so we checked other cylinders an they were also low….il take a better look at it today and report back here for yalls suggestions…my borescope is loaned out at the moment so soon as its back il be doing that

 

i would think to rebuild it would be cheaper than replacing it, am i wrong..?…finding out the root issue is definitely ganna happen, i was just curious as to what you guys thought as far as, instead of “diagnosing “ an obvious issue, either rebuild or replace is all

 

Did you try both wet and dry compression tests?

 

Which is is cheaper depends a LOT on what happened to the motor, and how thorough of a rebuild you do. You can get long blocks pretty cheap these days.....

 

was a dry test

 

i would rebuild it back stock

 

Year make mileage

You say leak down compression test.... that right there should reveal where the compression was leaking down to.

What were your numbers? Post them here.
What did the spark plugs look like? Post a photo here...