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You can go to Summit Racing and find new rocker arms and lifters, this problem is very common on the LA1 motor thou. My car's been doing it for 100,000 miles / 9 years now.
Ben at WOTTech.com has a few nice sets of valve springs. He sells the LS6 springs and a few Comp cams sets. If you are doing new springs, get the LS6 springs, they will be fine on a stock cam.
Yes the American motors like 5w30 oil. Some cars now use 0w20. I used 5w30 in my Alero, the ex wife's Altima, and mom's 2.2 OHV Cavalier. The Delta was the olny car I used 10w30 in, and that was in both engines
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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
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