Last post on Sep 02, 2013 at 12:12 PM
You are in the Hyundai Elantra
What is this discussion about?
Hyundai Elantra, Hatchback, Sedan
Go to NHTSA to file a safety complaint.
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#2656 of 3420 Re: Loud Engine - need advice! [ahj1]
Jan 07, 2007 (10:24 pm)
It's kind of tough to help you without hearing the noise, but I asked your question on another forum and got several suggestions to consider:
* There was a recall on the exhaust manifold due to cracking. If your noise is an exhaust noise, that could be it. (I had an Escort that had a cracked manifold and the term "jalopy" came to mind in terms of the sound.) I tend to think this isn't your issue since two different dealers didn't identify it.
* There is a Technical Service Bulletin regarding *some* aftermarket oil filters causing noise in the engine, including at least potentially in the valves (you mention "hydraulics"; I'm guessing you mean hydraulic valve lifters). If you've used aftermarket filters, especially (from what I hear) Fram, this may be your problem. Hyundai filters have a bypass valve so that when there is a period of high oil flow through the engine, the filter element is bypassed to ensure an adequate oil supply; not all aftermarket filters that can fit on the Elantra have a bypass valve. Without the valve you can get oil starvation. If you've used aftermarket filters and suspect this is your issue, start using OEM oil filters from here out. It may improve things, but maybe not. (Complete text of the TSB at the end of this post.)
* If you have a crack in the intake, it can make the car sound noisier. Starting from the engine, there is a tube connecting to the air filter box, then another tube that goes into a resonator (in the left front fender, between the headlamp and the wheel well), and finally a "snorkel" tube just behind the left headlamp. The resonator makes the intake of the engine quieter, so if there is a crack in it or between it and the intake manifold, you might get additional noise. (Some people take the air box off and put on aftermarket air filters and it makes the car louder.)
Here is the oil filter TSB:
Page 1 of 1
Technical Service Bulletin
Subject USE OF AFTERMARKET ENGINE OIL FILTERS CAUSING ENGINE KNOCKING NOISE
Group ENGINE MECHANICAL
Date JULY, 2005
Model ALL MODELS
CIRCULATE TO: [ ] GENERAL MANAGER
[X] SERVICE ADVISOR [X] SERVICE MANAGER [X] WARRANTY MGR [ ] SALES MANAGER
[X] PARTS MANAGER [X] TECHNICIAN
Some vehicles may experience an engine knock noise with the use of an aftermarket oil filter. Aftermarket oil filters may use different materials, construction and specifications
than genuine Hyundai oil filters, which may lead to pressure variations within the engine, thus contributing to an engine knocking noise.
Perform an oil change on the vehicle and replace the aftermarket oil filter with a genuine
Hyundai oil filter.
Normal warranty procedures apply. This is not a warranty repair.
#2657 of 3420 New Head Design
Jan 08, 2007 (5:37 am)
Although it's common knowledge that the 2.0L Beta engine in the 2007 Elantra received some tweaks, including a new cylinder head design, I wasn't aware the late production runs of the 2006 Elantra also received the new head.
I just noticed TSB 06-20-004 dated November 2006 for the Elantra, and it covers 2.0L Cylinder Head and Timing Belt Systms - Part Update. Here's the info:
"An updated cylinder head, timing belt tensioner, and tensioner bolt have been implemented since June 15, 2006 production on all 2006 and 2007 model year 2.0L equipped vehicles. These new parts change the 2.0L timing belt system to an automatic adjustment type from the previous fixed adjustment type."
Vehicles affected include:
2006MY - Elantra 2.0L (Produced from 6/15/2006 - current)
2006MY - Tiburon 2.0L (Produced from 6/15/2006 - current)
2006MY - Tucson 2.0L (Produced from 6/15/06 - current)
So, it looks like those who bought final production units of the 2006 Elantra received not only the new head design used on the 2007 Elantra, but it's new automatic belt tensioner.
BTW . . . the new automatic tensioner system cannot be fitted to the old cylinder head. Darn . . .
#2658 of 3420 Re: hyundai parts [doohickie]
Jan 08, 2007 (8:17 am)
)) "Some aftermarket oil filters fit the Elantra, but they don't have the bypass valve. This can lead to oil starvation and shorten engine life." ((
Very true - if it were true... The only oil filters which do not come with bypass valves are for some GM applications (and only because the affected GM motors have an internal bypass valve mounted in the engine block), and none of those will even fit a Hyundai engine's threaded mounting nipple. There has to be some provision for bypassing excessive internal pressure buildup in an oil filter because that's the only way to assure the filter cannister won't burst and that the engine will always have a continuous supply of oil in the event the paper filtration media clogs. (Of course clean oil flowing throughout an engine under load is preferable to dirty oil, but dirty oil is always far, far preferable to no oil at all. ) The problematic Fram oil filters from one Fram factory had bypass valve calibrations that were only marginally within Hyundai's specs - and they may've been responsible for the "knocking" noise that some owners complained about. (Hyundai was coyly silent in identifying the miscreant brand(s) - which suggests to this observer the company may've been really been slyly promoting sales of its replacement oil filters than delivering a needed advisory about defective competitive products - especially if naming names might've resulted in the company facing litigation...) In any case, the noise was a pressure shock noise, NOT a rod knock, valve clatter, or piston slap, and pressurized oil was always available throughout the engines. One final note: The use of aftermarket brand oil filters is not a basis for an automaker to deny a warranty claim unless it can prove the individual example caused the failure. (Merely saying XYZ's oil filter caused an engine failure is not proof.) This isn't hearsay - it's guaranteed under the Moss-Magnuson Consumer Protection Act of 1965 and administered by the Federal Trade Commisson as part of that agency's interstate commerce enforcement provisions. The oil filter companies will (and do) reimburse car owners to repair the damage or replace engines caused by failures of their products in service. In that regard the aftermarket industry is held to the same accountability standard as OEM oil filter suppliers. Fram has no higher a failure rate than other filter manufacturers despite some internet Fram-bashing hysterics' claims to the contrary. Fram is a major supplier to Honda America of Honda oil filters - most replacement oil filters sold through Honda dealerships are manufactured in Fram's Canadian plant. (If a Honda oil filter says, "Made in Canada", it's a Fram made filter.) Purolator not only sells through aftermarket channels under its own name, it's also a supplier of certain Bosch Premium* and the supplier of Pep Boys "ProLine" oil filters and its parent company is also a supplier of otherwise identical filters as OEM branded filters to U.S. Toyota and Nissan assembly plants. Ford Motorcraft oil filters available at retail are supplied by Purolator (though built specifically to Ford specifications requring a base-plate end bypass valve) though Motorcraft OEM filters installed on Ford assembly lines are supplied by another company - Hastings, I think. Champion Labs (no relation to Champion Spark Plug Co.) supplies WalMart "SuperTech" brand oil filters, entry level Bosch oil filters, as well as most if not all AC-Delco oil filters currently. Champion Labs also makes the ten-bucks-a-pop K&N oil filters. My point is don't diss the aftermarket suppliers - they're often trusted premium brand and OEM suppliers, too. For those who nevertheless insist on using genuine Hyundai oil filters, rejoice and be exceeding glad - they are very well designed and executed, so use 'em with confidence.
*Bosch Premium (with "Filtech™" media) and Purolator PureONE (with the company's own "Micronic Filtration" media) oil filters compare very favorably in their filtration efficiency. They seem to be priced virtually identically, too.
#2659 of 3420 Re: hyundai parts [ray_h1]
Jan 08, 2007 (8:38 am)
Thanks for the info. Do you know who make Advance Auto Parts housebrand Totalgrip oil filters?
#2660 of 3420 Re: hyundai parts [acura03g]
Jan 08, 2007 (8:45 am)
#2661 of 3420 Re: hyundai parts [ray_h1]
Jan 08, 2007 (8:50 am)
I heard so too. and its inside does look the same as Purolator Premium Plus, although parts number is the same as Fram. So I wasn't sure. Is there a link to this?
The reason I am interested in this is that Totalgrip is often onsale for $1.44 a peice. If it's a Purolator Premium Plus, then it's a great deal.
#2662 of 3420 Re: Loud Engine - need advice! [ahj1]
Jan 08, 2007 (10:54 am)
Are you talking about the anti-drainback valve? Not all filters have that, but the Hyundai and AC Delco application definitely do. This was an issue a while back on some GM AC Delco filters. GM quickly revised the part and changed the number. I know for a fact that the 4.8, 5.3, and 6.0L v8 engines were affected in '99, '00.
#2663 of 3420 Re: hyundai parts [ray_h1]
Jan 08, 2007 (6:31 pm)
In one case, I do know who manufactures the Elantra's air filter element - Mann of Germany, no less. This may not be true will all of them, but in this case it was. Mann is an excellent filter manufacturer as well.
#2664 of 3420 Re: hyundai parts [ray_h1]
Jan 08, 2007 (7:52 pm)
Thanks for the info. I was close, but not quite right, eh? I guess you gotta take everything you see on the internet with a grain of salt.
#2665 of 3420 Engine vibration. normal?
Jan 09, 2007 (10:14 am)
Mine is 07 SE auto. 1100 miles now. Today I opened the hood to check tranny fluid level (engine was running). The engine was visibly vibrating. When I seat behind steering wheel, it can feel slight vibration on steering wheel too. Is this normal or something needs adjustment?