Loose Plugs?

[Sisuguy]

Last fall I replaced the plugs in my 2000 Boxster S, with a set of the 4+ Bosch.

The car ran well but had a slight "burble", had it been a carbureted engine I would have said its a touch rich....

Anyway, decided to replace the plugs with a different brand. As I went in to replace them I found every plug could be broken loose with maybe 5 ft.lbs. of torque max! None were leaking however. All were torqued to spec when installed.

Anyone else experienced this?

[White987S]

Same torque wrench? All 6 plugs?? Did you use anti seize on the threads??? I say operator error.

[JFP in PA]

Last fall I replaced the plugs in my 2000 Boxster S, with a set of the 4+ Bosch.The car ran well but had a slight "burble", had it been a carbureted engine I would have said its a touch rich....Anyway, decided to replace the plugs with a different brand. As I went in to replace them I found every plug could be broken loose with maybe 5 ft.lbs. of torque max! None were leaking however. All were torqued to spec when installed.Anyone else experienced this?

We install plugs just about everyday of the week, we use anti-seize on all of them, and torque them to specs with torque wrenches that are regularly tested for calibration. In all the years we have been doing this, we have never had a plug come loose. Do it properly, and there should be no issues.

[Sisuguy]

Yes, same calibrated wrench. I have been assembling engines for 30+ years I don't think it was operator error! . They were torqued on install and now uniformly loose as well...

JFP I took your advice and went with the Denso plugs this time. Does seem to be running "crisper".

[JFP in PA]

Yes, same calibrated wrench. I have been assembling engines for 30+ years I don't think it was operator error! . They were torqued on install and now uniformly loose as well...JFP I took your advice and went with the Denso plugs this time. Does seem to be running "crisper".

We like the Denso plugs and have had very good luck with them on "plug killers" like the turbo. The fact that they are the longest lived plug on the market is also a positive as the turbo cars are a multi hour job to change plugs.

[JFP in PA]

Yes, same calibrated wrench. I have been assembling engines for 30+ years I don't think it was operator error! . They were torqued on install and now uniformly loose as well...JFP I took your advice and went with the Denso plugs this time. Does seem to be running "crisper".

We like the Denso plugs and have had very good luck with them on "plug killers" like the turbo. The fact that they are one of the longest lived plug on the market is also a positive as the turbo cars are a multi hour job to change plugs because of everything that has to come off the car to get at the plugs.