4.8/5.3 truck pcv vs. ls1 pcv
02-24-2011, 01:09 PM
#1
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4.8/5.3 truck pcv vs. ls1 pcv What is the difference between the two pcv systems? My 4.8 work van gets the snot beat out of it and doesn't use a drop. It has 82k miles and gets 5k oil changes using conventional oil. My ls1 has 86k miles and I'm really easy on it, only get on it now and then and it uses about 1-1.5 qts. in 3000 miles whether I use conv. or synthetic.
02-25-2011, 08:16 PM
#4
Depends on the year. LS1s used the inline PCV that gunks up easily since it's laid on its side. Several how-to threads show how to reduce oil consumption by switching to a low-buck vertical PCV
Early trucks used a conventional PCV mounted directly to the drivers valve cover. Consumption was better than Fbodys, but still high compared to other engines. GM released a fix mostly to appease customers with a fixed orifice PCV which isnt a PCV at all, but a block off with a 1/16" hole drilled in it. This lasted for a few years before GM release a new valve cover design around the time GEN IV engines came out with an integrated baffle system similar to the of the LS6 valley cover. You can spot these by the tube actually sticking up on the drivers side
Cheapest PCV update is to pick up about 5 feet of PCV hose, one conventional 90* PCV and one 3/8" vacuum cap. PCV in the drivers valve cover, run the hose around the rear of the intake to the lower port behind the TB. Cap the rear port on the pass valve cover and run the front port to the upper TB port. You can use a common $2 PCV or GM's updated solid piece with this
Early trucks used a conventional PCV mounted directly to the drivers valve cover. Consumption was better than Fbodys, but still high compared to other engines. GM released a fix mostly to appease customers with a fixed orifice PCV which isnt a PCV at all, but a block off with a 1/16" hole drilled in it. This lasted for a few years before GM release a new valve cover design around the time GEN IV engines came out with an integrated baffle system similar to the of the LS6 valley cover. You can spot these by the tube actually sticking up on the drivers side
Cheapest PCV update is to pick up about 5 feet of PCV hose, one conventional 90* PCV and one 3/8" vacuum cap. PCV in the drivers valve cover, run the hose around the rear of the intake to the lower port behind the TB. Cap the rear port on the pass valve cover and run the front port to the upper TB port. You can use a common $2 PCV or GM's updated solid piece with this
