Smokey tailpipe after every oil change

**jick.cejoco** · July 6th, 2018 08:38 PM

Originally Posted by wewoy_romero

Ano kaya problema ng sasakyan ko?

Everytime after oil change naglalabas ng usok sa tambutso. Hindi naman continuous na mausok. Minsan pag ni-rev meron. Minsan kahit i-rev wala. Minsan naka-idle lang meron. Minsan wala. Pero after a few days/weeks mawawala naman yung usok. Smoke is parang bluish white pero manipis (hindi yung pang-smoke belcher) at nagdidissipate naman agad sa hangin. Tailpipe is damp. Checked oil level saktong-sakto lang sa max level sa dipstick.

Last 3x oil change ko na ito nanotice.

Before you point your finger at possible worn piston rings and possible valve seal poor sealing, have the PCV valve cleaned or replaced. As per your post, it is intermittent. Avoid the harsh guesses that will cost you time and money. If you have been diligent in maintaining your engine lubrication with the recommended engine oil, there shouldn't be sufficient mechanical wear to the piston rings and valve seals.

**yebo** · July 6th, 2018 09:41 PM

Valve stem seals are worn. Kaya palitan yan without removing the cylinder head .... kung marunong ang gagawa.

**wewoy_romero** · July 7th, 2018 10:18 AM

This started last year. I change the oil around june/july and again at around december/january so parang 2x a year. It is a 2000 vehicle with a little over 170k on the odo so i think every oil change is at around 5k km. I had the pcv cleaned middle of last year when it first happened tapos hindi agad nawala pero nawala after a few days of use. Last december didn't have time to have it cleaned pero nawala rin usok eventually. Kaka-oil change ko lang last weekend and eto na naman ang intermittent smoke.

Mura lang naman palinis ng pcv so pagawa ko yun and at the same time try ko pacompression test. Thanks!

**granro01** · July 7th, 2018 10:29 AM

Not a good sign. Its either lose piston rings or valve seat.

Originally Posted by wewoy_romero

Ano kaya problema ng sasakyan ko?

Everytime after oil change naglalabas ng usok sa tambutso. Hindi naman continuous na mausok. Minsan pag ni-rev meron. Minsan kahit i-rev wala. Minsan naka-idle lang meron. Minsan wala. Pero after a few days/weeks mawawala naman yung usok. Smoke is parang bluish white pero manipis (hindi yung pang-smoke belcher) at nagdidissipate naman agad sa hangin. Tailpipe is damp. Checked oil level saktong-sakto lang sa max level sa dipstick.

Last 3x oil change ko na ito nanotice.

**chris_d** · July 7th, 2018 10:47 AM

Anong viscosity ng oil na gamit? switch to 20w-50 baka mawala yung smoke. Also make sure nde nila ginagamitan ng compressed air para ipalabas yung old oil. May iba kasi nilalagyan ng hose sa filler cap para malabas yung old oil ng mas mabilis.

Long time ago had similar problems. Ended up as top overhaul. After more than 5 years ok pa rin naman ngayon.

**Walter** · July 7th, 2018 02:46 PM

Using thicker oil to solve an engine issue does not really fix it ... You'll end up with a sluggish engine and increased fuel consumption ...

**Lew_Alcindor** · July 8th, 2018 11:48 AM

Summary of what has been suggested. In order of easiness and cost

1. Check/replace PCV valve - very easy and cheap. Can be done DIY.
2. Have a shop perform a compression test to isolate the problem.
3. Replace valve (stem) seals. Can be done without taking apart the cylinder head (depende sa mechanic).
4. Replace head gasket. - semi-major work
5. Replace piston ring - can be inspected during head gasket replacement. Major major gastos.

**jick.cejoco** · July 8th, 2018 12:13 PM

As per ALL DATA information system, your CRV is equipped with a B20 series engine, uses hydaraulic rocker arms to actuate the intake and exhaust valves. The exhaust valve stems could not have caused the symptom because the exhaust is positive pressure when the engine is running. However, the intake valve seal is exposed to negative pressure or intake manifold vacuum when the engine is running.
But, assuming the intake valve is breached, the smoking will be there regardless of the engine running speed at all times. Same falls through with bad or broken piston rings. The smoking will be full time in both cases as the engine runs.
It is either the oil return drain holes in the cylinder head are partially clogged up or the PCV Valve is not able to move and adjust to the intake absolute running pressure. Do the least intrusive and least cost and disruption first which is the cleaning or replacing the PCV valve . Your choice sir, if you want to spend more.

**wewoy_romero** · July 9th, 2018 02:03 PM

i use 10w40 always since it is an old vehicle.

i did a diy cleaning of the pcv and throttle last weekend. went on a trip from taguig to quezon city and back and didn't notice any smoke. hopefully ok na.

**Jiggs** · July 12th, 2018 08:43 AM

Originally Posted by chris_d

Also make sure nde nila ginagamitan ng compressed air para ipalabas yung old oil. May iba kasi nilalagyan ng hose sa filler cap para malabas yung old oil ng mas mabilis..

Sir if you can share...what is wrong with the practice? What particular part ng engine potential na masira kapag ginagawa lagi yun? Thanks..