|
|
|
|
| Author |
|
|
Registered User
Join Date: Sep 2014
Posts: 6
|
Help with a Mini
08 Mini base, oil fouling number 2 plug, compression at 198 and leak down was 0 loss.
any help would be great |
||
05-05-2015, 08:51 AM
|
|
|
Registered User
Join Date: Dec 2013
Posts: 21
|
if leak down is 0...
The leakdown checks the rings and valve seal (valve to head - not valve stem sealing) - if 0 or low then either they are not leaking or your tester isn't working correctly - you should see a small amount of leak...
with 198 pressure I'd suspect the rings and valve sealing are good so where does the fouling come from??? a few ideas/questions valve seals and valve stem wear/condition - it could be a seal is worn or popped off and hence more oil is flowing down the valve How many miles on the car? What type/weight of oil are you using? does it smoke when it runs? does that cylinder have spark? Have you replaced that plug? |
||
|
05-09-2015, 03:41 AM
|
|
|
Registered User
Join Date: Sep 2014
Posts: 6
|
i had the head rebuilt 8k mile ago.. new guides, seats, valves. and seals. car has 125k. I removed the head and sent it back to the shop and nothing was found wrong. ran fine then one day number 2 just mis fired. removed plug and it had oil on it.. this is only after the engine warmed up. replaced the plug and same issue. leak down was working i used it on my land rover to check. starting to think oil ring and scraper ring are bad. i'm using recommed oil.. car was getting 40mpg and running like great.
|
||
|
06-02-2015, 02:48 PM
|
|
|
Registered User
Join Date: Sep 2014
Posts: 6
|
when i removed the head, i had no oil on the piston...
|
||
|
06-02-2015, 02:49 PM
|
|
