why different oil filters for 3.8
- Thread starter mcshooter
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just got back from autozone and their catalog only went to 2006 and showed hp2004 but checked their computer for 2007 and it shows hp1004 which is smaller. then compared the 2 for gasket size and the 1004 the gasket is about .060 smaller on dia. i would rather use the larger one. i am going to use verniers to measure the flange dia where filter attaches later as it is raining now. i just want to be sure the larger one wont leak although i have had it on for about 500 miles and no leak, it just seems strange they would go to a different size after 10 years
GM has been using tuna fish can size filters for years.
Maybe opt for a larger alternative; if the larger filter fits OK, good on you.
Other auto mfgs have been going smaller as well, in some cases, there are no larger filter that fits(threads have changed).
Maybe opt for a larger alternative; if the larger filter fits OK, good on you.
Other auto mfgs have been going smaller as well, in some cases, there are no larger filter that fits(threads have changed).
just measured the oil filter flange and both filters will fit ok, the gasket difference is .100 smaller on the small filter both on od and id //there is still plenty of contack surface on the larger filter, why they changed ??? have to ask someone from kn amd mobil1 i guess
Unfortunatly, many manufactures are going to teacup sized filters on engines that used to have larger ones.
As far as why GM has changed; economy of parts, reducing the number of filters reduces costs.
Check the threads. The HP-1004 has metric M20 x 1.5 threads, while the HP-2004 has English 3/4"-16 threads. Check the K&N oil filter compilation list elsewhere in the "Oil Filters" area. Someone very near and dear to me compiled that beast.
My question is, were you able to screw on the larger filter properly?
The computer could also be in error; it wouldn't be the first time we've seen that! I discovered that NAPA and others have been completely in error in their systems on fuel filters for certain tractors, for example, even though the company did offer the correct filter.
The trend toward smaller filters makes me a bit cynical, much like the trend toward thinner oil. But that's ...
My question is, were you able to screw on the larger filter properly?
The computer could also be in error; it wouldn't be the first time we've seen that! I discovered that NAPA and others have been completely in error in their systems on fuel filters for certain tractors, for example, even though the company did offer the correct filter.
The trend toward smaller filters makes me a bit cynical, much like the trend toward thinner oil. But that's ...
In some cases I think the OEMs are not giving the filter manufacturers the individualized data for each vehicle. For most aftermarket filters the manufacturer recommends the same filter for my 3.0L V6 Camry and 4.7l V8 Landcruiser. Toyota though still gives me a bigger filter for the cruiser since it has more space.
Then by that note, I presume your PC is an huge box and you would never have a notebook, that you don't carry a cell phone, have an Ipod or other device made with small components?
Ha ha, Mike. Electronics are a different story. No, my point is this: most BITOGers want to use larger oil filters, which would allow more safety margin and safe length of service. A frequent topic here is what the largest filter is to fit a particular application.
But the automakers are using smaller and smaller filters, sometimes because space is tight, but also because there still seems to be an unstated assumption that the service life of an engine is not expected to be more than about 100,000 miles. Of course, many owners don't do the recommended maintenance, which doesn't help.
So if smaller filters ultimately clog early and put the engine in constant bypass mode, with particles in the oil causing premature wear and ultimately wearing out the engine, the end still isn't likely to happen much before 100K miles. In the meantime the automakers have saved money with the smaller (cheaper) filters, and for those owners who do get the maintenance done, the dealers charge just as much for oil service using a small filter as a larger filter.
And if a customer holds onto his vehicle long enough for the engine to wear out after the warranty expires, why, the manufacturer will be more than happy to sell him/her a quality remanufactured engine. Then the cycle begins anew.
But the automakers are using smaller and smaller filters, sometimes because space is tight, but also because there still seems to be an unstated assumption that the service life of an engine is not expected to be more than about 100,000 miles. Of course, many owners don't do the recommended maintenance, which doesn't help.
So if smaller filters ultimately clog early and put the engine in constant bypass mode, with particles in the oil causing premature wear and ultimately wearing out the engine, the end still isn't likely to happen much before 100K miles. In the meantime the automakers have saved money with the smaller (cheaper) filters, and for those owners who do get the maintenance done, the dealers charge just as much for oil service using a small filter as a larger filter.
And if a customer holds onto his vehicle long enough for the engine to wear out after the warranty expires, why, the manufacturer will be more than happy to sell him/her a quality remanufactured engine. Then the cycle begins anew.
Most companies are downsizing their oil filters to save space and probably cost. I think it is very rare for even these small filters to get anything close to fully saturated with contaminents in even the extended normal drain intervals of new vehicles. Honda now uses a filter which used to be normal sized for a lawn tractor, and calls for changing it at every other oil change.
Oddly enough, a small filter might be a good thing if you are only changing it every other time as there would be less used oil trapped in the old filter.
Oddly enough, a small filter might be a good thing if you are only changing it every other time as there would be less used oil trapped in the old filter.
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