Leak down test results. Opinions?
 

So i was feeling ambitious today and I did a leak down test on my talon.

The results are
Cyl1: 30 percent, cyl2: 22 percent, cyl3: 25 percent, cyl4: 25 percent.

What are your guys opinions?

Put it back together and do a compression test? If it's decent let her buck?

Or put it back together do a comp test and a more thorough leak down test to see where it's leaking?

Any opinions are greatly appreciated.

Re: Leak down test results. Opinions?
 

Depends on what you want to do. Do you want to finish the car or just get it running decent and sell it or part out? If your planning on finishing the car put it back together and do a compression tests and a leak down test.

Re: Leak down test results. Opinions?
 

Honestly i want to have some fun with the car. If iI can get it up and running and at least get it close to where it was on the gt42 without replacing valves that would make me happy. If iIjhave to pull the head there is a good chance I will do at least a partial part out

For right now I think I'm going to try and get it back together and do a compression test this weekend.

Re: Leak down test results. Opinions?
 

I would do a compression test and see what the numbers are before you do anything. Hopefully the numbers are good.

Re: Leak down test results. Opinions?
 

Ya we'll see if it'll run too ha.

Re: Leak down test results. Opinions?
 

This was done on a cold engine that hasn't had oil pumped through it for over a month. Not sure how that will affect the sealing of the rings. But what I'm curious about is if let's say it has okay compression and runs and the leakage is from bent valves what kind of effect with that have on the engine with how high I want to rev the engine

Re: Leak down test results. Opinions?
 

5% or less is excellent. 10% or less is what you want to see. 15% is starting to get to the point where something might need to be fixed eventually. 20%+ is often noticeable power loss. It depends too if it's just rings or if it's a valve problem. I have had Evos in with 5% or less on 3 cylinders and 1 cylinder in the 15-20% range due to a bent or non sealing valve that lost 20whp on low 300whp cars.

Re: Leak down test results. Opinions?
 

Hmmm that's good to know. I think for now I'll plan on putting it back together and seeing if it will run. If it runs I'll let it warm up and do the compression test and another leak down test and see if the numbers change at all. If they don't change I'll try and see if I can tell where were leaking from. Everything only has 600 miles on it and considering the timing belt stripped I would assume it's the valves

If its the valves I'll pull the head and fix it

If it's the rings I'm not touching the shortblock. I'll say F it and let her buck

Re: Leak down test results. Opinions?
 

That's whats up!

Re: Leak down test results. Opinions?
 

Exactly what I would do.

Re: Leak down test results. Opinions?
 

Word

Awesome! Thanks for the input! Sounds like I have a good plan of attack the