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Have you done a compression test?
Check in the oil breather pipe to see if there is a lot of oil in there.
Check in the oil breather pipe to see if there is a lot of oil in there.
Plenum off, spark plugs out, compression tester in, turn over engine. Easier than taking the head off
The little pipe that goes into the inlet elbow between the air filter and throttle body. Just pull it off the elbow and look to see if it has a lot of oil in.
That's roughly 2 to 3 times the amount of oil consumption I'd consider normal for a very hard driven F4R - as such its a fairly decent certainty that its broken. Stem seals are a good possibility if there are no external leaks.
It's head off to do it and you may as well have a the seats recut at the same time to ensure theres no valve seat regression issues.
Cheers
M
It's head off to do it and you may as well have a the seats recut at the same time to ensure theres no valve seat regression issues.
Cheers
M
Doing a compression test isnt very indicative of poor oil control ring condition. At the end iof the day, you could have a cracked oil ring, yet the top and second ring will still allow normal compression.
Does it chuck out a nice puff of smoke on start up after a couple of days standing about?
If your brave you can do the stem seals without taking the head off.
Does it chuck out a nice puff of smoke on start up after a couple of days standing about?
If your brave you can do the stem seals without taking the head off.
'02 Monaco Blue 172
Cheers for the advice, i'll have a look at the breather pipe and get hold of a compression tester and give that a whirl.
The problem is, I rarely drive it 'hard', this is just from normal motorway driving, seem to put a litre of oil in every two weeks!
Dont think it chucks out any smoke on start up, it does have a bit of a hesitation problem from low down revs, could this be related?
This problem started when my cam belt went last year, already had the valves, phaser pulley, belts and aux belt pulley, cam seal replaced but wanted to try and sort this myself now as i cant be bothered taking it back to the garage again and it drives fine otherwise!
The problem is, I rarely drive it 'hard', this is just from normal motorway driving, seem to put a litre of oil in every two weeks!
Dont think it chucks out any smoke on start up, it does have a bit of a hesitation problem from low down revs, could this be related?
This problem started when my cam belt went last year, already had the valves, phaser pulley, belts and aux belt pulley, cam seal replaced but wanted to try and sort this myself now as i cant be bothered taking it back to the garage again and it drives fine otherwise!
Head off, valves out, check for cracks in the guides on the port side of the head.
If they are cracked, you'll need them pressed out and new ones pressed in.
If you get stuck my email is info@ap-developments.co this is the type of work I do.
Saying all this, might be easier just to swap for another head---risk in that though is that replacement head may be just as bad.
If they are cracked, you'll need them pressed out and new ones pressed in.
If you get stuck my email is info@ap-developments.co this is the type of work I do.
Saying all this, might be easier just to swap for another head---risk in that though is that replacement head may be just as bad.
'02 Monaco Blue 172
Cheers Stan, how much would you be looking for for one? is the head the part where the oil rings and stem seals are?
Done a quick search and it doesn't seem too big a job to take the head off?
Would it be like for like swap of head or would I have to mess with anything else?
Done a quick search and it doesn't seem too big a job to take the head off?
Would it be like for like swap of head or would I have to mess with anything else?
Expert HDI & R53
Any updates on this Dan?
Focus RS mk1
i had the piston rings go on mine and it was pouring smoke out the back, compression was escaping past the rings causing loads of oil to blow through the breathers almost filling the manifold im suprised it would even still run! whilst engine was out they found it was the rings on cylinder 3. i had everything replaced, all new stem seals and piston and oil rings on every cylinder. sweet as a nut now
'02 Monaco Blue 172
Bit of an update, although not had much time to look into this but i'm definately sorting it soon.
Took plenum off and had a look at spark plugs and this is generally how they all looked, this being the worst, two of them weren't too bad(sorry, bad iphone pic!)
Thoughts on the reason the spark plug would be like this?
Got a compression tester but not had chance to do the test yet, also done a bit of ringing around and i've got a price of £135+ vat to replace all valve guides when I finally get the head off, which should be in the next few weeks, does this price sound about right?
Took plenum off and had a look at spark plugs and this is generally how they all looked, this being the worst, two of them weren't too bad(sorry, bad iphone pic!)
Thoughts on the reason the spark plug would be like this?
Got a compression tester but not had chance to do the test yet, also done a bit of ringing around and i've got a price of £135+ vat to replace all valve guides when I finally get the head off, which should be in the next few weeks, does this price sound about right?
