Low compression???

[redturbo66]

I just did a test today and here's what I got:

1-170
2-180
3-150
4-175

#3 isn't looking too good.........or is it??? I am not sure if that's within limits for me to stay away from breaking down on the side of the road. Please let me know. Any suggestions would be appreciated.
Thanks.

 

[1fast97gsx]

they have to be within 15% of each other to be considered " ok " ... do a leakdown test.

 

[redturbo66]

What is a leakdown test? Do you have a link for me?

 

[1fast97gsx]

What is a leakdown test? Do you have a link for me?

go to vfaq.com and look around on there under the engine section I'm pretty sure ... I know it's on that site.

 

[MattnGsx]

I just did a test today and here's what I got:

1-170
2-180
3-150
4-175

#3 isn't looking too good.........or is it??? I am not sure if that's within limits for me to stay away from breaking down on the side of the road. Please let me know. Any suggestions would be appreciated.
Thanks.

for a 2g 4g63
standard compression is 178psi 133psi is service limit. So cylinder 3 doesn't look that great.

 

[me612]

drop a little bit of oil into that cylinder and see if the number goes up, then try it again a little later and see if its back to the original number. If the cylinder does that, then rings is more then likely your culprit.

 

[redturbo66]

It's going to be at least a few days until I get to this. When I do, I'll post an update. Thanks for your help.