Compression check - high mileage

[Russ_16v]

as most people,i worry about high mileage,so had the chance to check the compression on my 172 today,and all cylinders came back at over 160 psiwhich i thought was pretty good for 113,000 miles so no more real worries for me lol

 

[Ad]

lol you worry about mileage but have a car with 113k on the clock...

Doesnt mean anything to mean 160psi so cant comment ( I realise its lost of pressure... but relatively..)

 

[Russ_16v]

i dont really worry that much,im used to cars with higher (my highest was 197k on a beemer) but i meant that the compressions are all very equal over the cylinders and still showing i high reading so im happy with that

(oh the reason y i have this car is i bought it bk at the beggining of the year with 98k for 2k)

 

[edde]

Should be about 165 psi new so that fine. There no real issues these days with it, if you loose compression you usually know about it.

 

[Russ_16v]

yeah true matey,its nice to know after 113k its still good,my 1st valver on 125k only had 110 psi lol

 

[Fred@BTM]

valver is a lower compression engine than a 172 so will always read lower

 

[Russ_16v]

oh right,fair enough didnt realise that fred

 

[Fred@BTM]

i'm actually talking s**t LOL a compression test has nothing to do with a comp ratio, i'll shut up now oops!

 

[Russ_16v]

ok lol,question,i know its good to have all cylinders at the same compression,but i was under the impression that compression tends to drop as an engine wears? so i would have thought mine would have been lower than it is if that is the case?

 

[ben_p]

lol i remeber when my gti died

1st 170 , 2nd 66, 3rd 71, 4th 171

guess where the gasket went LOL

 

[ben_p]