An expert who has achieved level 3 by getting 1000 points
An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.
An expert that got 20 achievements.
An expert that got 10 achievements.
Re: noisy start in the morning
I am assuming that you used el cheapo oil filter rather than a known brand in the service. Oil filters have a non drain back valve built into the filter to stop your problem but some cheap or wrong filters do not have this valve hence your problem.. The noise goes when the oil pressure fills up all the hydraulic lifters and oil pressure is achieved.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
the hydraulics will leak down after the engine has been stopped for a while . The noise on start up will be until the oil again fills the lifters. If it is getting really cold (under 32F of close to 0 c) then you may have to consider a lighter viscosity grade of engine oil (10w-20 or 15w -30) the manual will have the recommended viscosity of oil for cold areas or you can check with the oil catalogue at any auto parts store.
Make sure the oil filter is fitted with a return valve, some after market filters don't have this valve, and the oil drains back to the sump when stopped, It takes a second or two after starting to build up pressure with type of filter, so there is a rattle.
This may be from a worn lifter that is allowing the oil to drain back . Check the viscosity of the oil you are using. If you are using a cheap after market filter be aware that some filters do not incorporate an anti drain back valve in the filter and this allows the lifters to empty m.
Valve noise will be there all the time, unless the vehicle has hydrolic lifters. if it has then the lifters should be replaced. If it has adjustments you can check the clearance with a feeler gauge, but I believe the sound is more likely to be low oil pressure. this can be caused by the wrong oil filter having been fitted or the oil pump becoming weak. The third reason is wear on the connecting rod or main engine bearings. With mechanical adjustable followers the noise will be steady at all times and not disappear . As you haven't named the vehicle or engine type it's a little difficult to be explicit.
This is most likely a noisy lifter (or valve tappet). In cold weather, the clearances in the valve train open up because metal contracts due to the cold. Once the oil pressure comes up after start the noise goes away because the larger clearance fills with oil and the lifter becomes "cushioned" with the oil. The proper fix is to have the valves adjusted. I believe in your model, that is done by putting shims on the lifters. This will quiet the noisy lifters. In the short term, you can try using a lighter weight oil for cold weather. This will get the oil to the lifters faster after start up and quiet the tapping more quickly. Once the weather warms again, shift back to the normal weight.
I suppose it would be good to make certain that you have adequate oil in your engine... but as far as the oil viscosity: 20w as number representing the oil at its thinnest, is not 'thinner oil'. 5w-30 would be thinner... If there's concern of the lifters getting enough lubrication, an alternate route is the oil additive made by "Lucas Oil", it causes the oil to stick to the parts & surfaces... it's pretty decent stuff that has been used as an additive in our 8 cars for years.
ENGINE CLICKING NOISES A clicking or tapping noise that gets louder when you rev the engine is probably "tappet" or upper valvetrain noise caused by one of several things: low oil pressure, excessive valve lash, or worn or damaged parts. First, check the engine dipstick to see if the oil level is low. If low, add oil to bring it back up to the full mark. Is the engine still noisy? Check your oil pressure. A low gauge reading (or oil warning light) would indicate a serious internal engine problem that is preventing normal oil pressure from reaching the upper valvetrain components. The cause might be a worn or damaged oil pump, a clogged oil pump pickup screen or a plugged up oil filter. Using too thick a viscosity of motor oil during cold weather can also slow down the flow of oil to the upper valvetrain, causing noise and wear. COLLAPSED LIFTER NOISE Worn, leaky or dirty lifters can also cause valvetrain noise. If oil delivery is restricted to the lifters (plugged oil galley or low oil pressure), the lifters won't "pump up" to take up the normal slack in the valvetrain. A "collapsed" lifter will then allow excessive valve lash and noise. VALVE LASH NOISE If you can rule out lubrication-related problems as a cause, the next step would be to remove the valve cover(s) and check valve lash. On older import engines, mechanical lifters require periodic valve lash adjustments (typically every 30,000 miles). Too much space between the tips of the rocker arms and valve stems can make the valvetrain noisy -- and possibly cause accelerated wear of both parts. To measure (and adjust) valve lash, you need a feeler gauge. The gauge is slid between the tip of the valve stem and rocker arm (or the cam follower or the cam itself on overhead cam engines) when the piston is at top dead center (valve fully closed). Refer to a manual for the specified lash and adjustment procedure. Also, note whether the lash spec is for a hot or cold engine (this makes a big difference!). On engines with hydraulic lifters, oil pressure pumps up the lifters when the engine is running to maintain zero lash in the valvetrain. This results in quiet operation. So if the rocker arms are clattering, it tells you something is amiss (bad lifter or worn or damaged parts) or the rocker arms need adjusting.
Let me know if you have any other questions. Thanks for rating my response and for using FixYa!