I burn oil

[Crowbie]

I did a compression test on my engine today and i got 150-155 lbs of pressure all around on all cylinders all within range and I'm burning oil SOOO it seems that my valve guides are worn out

Does anyone have an idea how much replacing all the valve guides would cost for two heads? Like a good estimate.

I'm just deciding if repairing these will save money in contrast to buying some S/R Torquers.

[pat mccarthy]

i get 5.00 for the manganese bronze guides and 5.00 to put each one inand you will need a valve job and yes knurling works to and it is cheaper

[Crowbie]

you see. all those words you use was like speaking arabic. I know ZERO machine shop terms. except like. Valve Job.

[Dave Severson]

that means $160 for the guides installed plus the price of a valve job.

[Crowbie]

nice
well a valve job costs 75$ for both heads.
Sooo
About 250 or 270 at my shop depending on prices. Now to see about porting those heads and running bigger valves at the local cylinder head shop.

[pat mccarthy]

there is more than one way to fix this but the way i do them cost a bit more knurling them you do not remove the guides you run a tool down them and makes the guides bore smaller by moving the guide metal that makes a spiral grove and will hold oil and help a bit on wear and the seal i like are the new rigid chimney metal-clad they work geat

[pat mccarthy]

75 for a valve job? that is cheap i get 120 for a good 3 angle

[Crowbie]

yep thats how much it cost me last time. But apparently they didn't check the valve guides.. OR they were good at the time and they've just now crapped out on me >_>

[pat mccarthy]

this is hard to say for me. but you get what you pay for? it would be hard to say what they did for you but. a good set of valve seals are 20 . so i do not see how they are making it

[chevydrivin]

Couldn't you still be burning oil around the rings even though the top ring has compression?

[Crowbie]

seems to be the guides in my opinion.
how do i do a leak test anyways?

[thesals]

seems to be the guides in my opinion.
how do i do a leak test anyways?

you need to borrow/rent/buy a cylinder leakage test gauge.... screws in like a compression checker but its got 2 gauges on it and a connector for an air compressor..... bring cylinder to TDC, hook up air, the one gauge will show you how many PSI and the other will tell you what percentage is leaking..... 15% is considerded safe on a cold motor as standard ring leak, more means you got something that should be fixed, and even more means you better fix it now..... you check the obvious spots for where the leaking is coming from.... exhaust pipe for exhaust valves, carb for intake valves, crank case for rings, bubbles in radiator for head gasket, and of course my favorite... neighboring cylinders for complete engine death

[Crowbie]

Okay heres the deal Its more than likely the heads because the motor has like 7k miles on it. the rings are new the pistons are new the heads didn't receive more than just a tanking and a valve job.

At first the heads were holding up and i burned ZERO oil now in the past few months its getting worse, i continuously take my plugs out and clean them off of burn oil.

[Crowbie]

To be honest denny, I have no clue.
These were stock when I pulled them.

I'm just going to have to get them worked on so that I stop burning oil.
And what I tell the machinist is.. what? Replace my valve guides?

Or tell him the symptoms and he looks over it and does what is needed?

[chevydrivin]

What motor? vehicle? miles? if you had the heads off some vehicles is not much trouble to drop the pan and knock the pistons out for a rering. While your heads are already off.