I?ve got a 95 5.7 L Chevy Box truck (FI), only about 50k miles
Runs great all day on local roads, but as soon as it?s on the highway (over 55 mph) for a few minutes, the lifters atart to rattle.
There is no drop in oil pressure, and the oil I?ve changed the oil every 1,000 miles three times.
Once it?s off the highway, a few miles later it?s back to normal.
There is no drop in performance, so it must be a lifter that collapses when it gets hot?
Any ideas/suggestions?
your HEARING SPARK KNOCK !!
Tor wrote:
Spark knock .. a 10 year old truck with only 50k is probably all=20 Carboned up!
Tor wrote:
Get a can of "top engine cleaner" from your local GM dealer Part #
1050002. I havent tried it yet, but I am going to run a can thru my Seville STS with 165KLike 6 or 7 dollars and suppose to remove all the carbon and other crap from the top end of your motor.
On 7 Mar 2005 11:21:53 -0800, "tekguy4" wrote something wonderfully witty:
All it did was make mine worse. Instead of tapping, they started sticking.
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