how do would you know its time to replace the valve seals verses the piston rings?

Question

i recently replaced the head an top end of my b2200 an its burns oil really bad. it smokes whenever i let off the gas coming off a hill.165000 miles

Answer 1

I agree with renpen (somewhat)

Do a compression test.

1. Dry first to get compression readings for all the cylinders.
2. Get wet readings by placing about a teaspoon of oil in each cylinder and re-doing the compression test.

If the compression test changes significantly (much higher) with the oil in the cylinders (wet readings) your rings are worn. If the readings don't change that much with the oil your valve seals are bad.

Answer 2

Sometimes if a vehicle is overheated, it screws up the rings as well as the head and/or head gasket. If they put a new head on it, it surly would have new valve seals.

Look for the tops of the pistons being clean around edges. Oil cleans off carbon.

Answer 3

I would take it back to the shop that replaced the head, if it smoked immediately after the work was done or prior to. They should have picked up on faulty rings, when they initially examined the engine or at least before doing the head work. Diagnosing this problem is the least they can do after the money you spent there, it's called customer service!

Answer 4

Sounds like the rings to me. You will need to pull the head to check either, so just pull the head off and look. If it is valve seals, you should have a warranty on a new head...

Answer 5

piston rings smoke under load.blue smoke.if the valve seals are real bad you will get fouled out plugs and the car will run rough at idle and on the low end. i had a honda that was like that.

Answer 6

you've were given some tremendous solutions already from individuals that've contributed to the thread. What you do not have is a definitive answer. I do ought to assert that the most staggering reaction you received to date is from the guy who stated that if it truly is a valve seal difficulty and consider that fixed, the restore of compression will probable coach problems with the earrings on the piston for the same cylinder. fixing one difficulty has a tendency to deliver others to the floor. The attempt to have run is called a "Cylinder leak-down try". you do not have the kit for this, notwithstanding it isn't an expensive try. it will help. ignore about "patching" this difficulty. inner engine belongings you won't be able to fool round with, believe me in this. What i ought to do if I were you is to bite the bullet and characteristic the right rebuilt and the earrings replaced. this isn't completely out of scope for the handmade mechanic notwithstanding it truly is an truly large job, one which you're going to wish a storage for and a good a number of days. The Chilton or Haynes guide on your motor vehicle walks you via it, yet plan on a large number of time previous regulation. do not take any shortcuts. Use a record and take a large number of images to save song of what you're doing as you artwork. in case you ascertain to do this your self, you easily ought to take the right to a device save for crack attempting out/resurfacing. maximum device shops will do the right rebuild for you (replacing seals, lap in new valves, regardless of needs to be finished. the funds will variety plenty, notwithstanding it frequently starts round 2 hundred money and is going up from there searching on necessary elements. not understanding all the specifics about your engine, i stumbled on a refurbished head on your motor vehicle (depending on the coaching presented) on-line for $660.00 USD. I placed the hyperlink in my elements record. earrings are literally not expensive and also you may replace the piston earrings without dropping the engine, yet i visit't rigidity sufficient that at the same time as this job isn't out of attain for the handmade mechanic, that is the most complicated job you may do short of an entire engine rebuild or a transmission rebuild. i ought to point the leak down try as an section to commence. it is going to recommend you are able to funds for the fix. Plus, it is going to recommend that once you're assigning the job to a save, they are going to recognize up the front that you're knowledgeable and they seem to be a lot less probable to take income of you.

Answer 7

If the head was just done, that would of taken care of the stem seals. You probably need rings and or rebore w new pistons.

Answer 8

Blue smoke at startup-Valve seals.
Blue smoke under all conditions-Rings

Answer 9

Blue smoke at startup-Valve seals.
Blue smoke under all conditions-Rings.

Answer 10

compression test. Worn rings will lower the compression or let it bleed off.