Replacing valve seats e suvidha electricity bill lucknow


I see this thread is a couple months old, but I think I can answer your questions. I have two early (05 and 06) 5.7 Hemi’s vehicles and also an early (06) 6.1 Hemi. The 5.7’s are a Magnum and a Jeep Grand Cherokee Overland and the 6.1 is a 300C SRT8. Because both the 5.7’s are early ones electricity 101 episode 1, I decided to be proactive and pulled them apart and had all the seats replaced, some new valve guides (a few were bad at relatively low mileage) new PAC1235 valve springs (I have FRI Sidewinder cams in both), ported/polished and milled .030 in. to increase the compression ratio by about a half point.

I have not heard of any exhaust seats dropping, only intakes. When my head shop was cutting the intake seats out of the 76 gas card payment heads of the Magnum (83K on the engine) he had two seats start spinning in their bores when he got about half way though the cuts, indicating too loose a press fit. He said these probably would have been candidates for drops. He had no problems with any of the exhaust seats spinning. If you’ve dropped an intake seat, it is also best that you replace the intake manifold because sometimes some of the seat material gets spit back into the manifold and you don’t want that getting back into the combustion chamber. Also, as far as the exhaust seat replacement goes, the seats only cost about $2-3 a piece and the labor to cut them out and reinstall should not be that bad. You’re going to have a valve job done on all anyway and, since the heads are already off, why not spend the few extra $$$ to do the job right? Also, if you have a bunch of miles on yours, chances gas near me are you may have some bad guides too as indicated by a couple on mine with only 83K on it.

Also, for several years before on both of mine, in an effort to keep the seat drop from happening, I installed lower temperature thermostats (190*) and reset the fan start temps. as follows: low=197*; medium=203*; high=207*. Since doing this, I have never seen the engine temperature of either one go higher than 214* and that was just momentary until the fans caught up. This happened at a construction site where we sat for a half hour in 104* ambient temperature, idling with the A/C on. It never got past 208* sitting there, but when we started going again, it shot up to 214* and the fans quickly brought it back down to about 205*. In normal driving the temps. usually run about 200-205 electricity and magnetism study guide answers* and sometimes in hot, stop and go traffic they’ll get up to 207-208*.

In the BIG scheme of things la gas prices, %age wise, it’s probably not that common. On the forums and the repair shops, you’re going to hear that it’s a real big problem. When I had my 05 Hemi LX heads done (83K on the engine), the repair guy said that, when he was cutting the intake seats out, two of them started spinning in their pockets before he had them half way cut out. All the others did not have this problem. I guess it could have been possible that these two were candidates, but there is no way of telling. Since the wife and I travel a lot, we just did not want to risk being stuck somewhere with this problem and be at the mercy of some unknown to us shop. Plus, I did mine at my leisure so didn’t have to worry about a potential unforeseen problem natural gas in spanish of this nature. Bottom line, for me, it was a peace of mind thing and I don’t for a minute regret having it done. For sure it’s cheaper than the inconvenience and price of possibly a new engine. To each his/her own though. IMO, you have to assess the pros and cons based on your own judgement and circumstances. I also believe that if your cooling system is properly maintained and you run a cooler thermostat/cooling fan start temps., your risk would probably be lower.