Express2500 4.8l low compression
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Joined: Nov 2020
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Express2500 4.8l low compression
Today my express started to misfire on multiple cylinders primarily #6 and # 8 so I checked the compression and had 0psi of compression in cylinder 6. My engine only has 210000 miles. Are these engines that ****ty I thought the last was suppose to be very reliable. My question is are the valves know to prematurely fail ?
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Joined: Mar 2011
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possible camshaft problem also. what were the compression numbers on the other cylinders?
the next possible steps imo would be:
-leak down test to determine where the loss is from,,,,intake, exhaust, headgasket, rings
-vacuum gauge to see if its a valve problem
-remove valve cover....crank it over and watch for rocker arm movement
the next possible steps imo would be:
-leak down test to determine where the loss is from,,,,intake, exhaust, headgasket, rings
-vacuum gauge to see if its a valve problem
-remove valve cover....crank it over and watch for rocker arm movement
Thread Starter
CF Beginner
Joined: Nov 2020
Posts: 6
Likes: 1
possible camshaft problem also. what were the compression numbers on the other cylinders?
the next possible steps imo would be:
-leak down test to determine where the loss is from,,,,intake, exhaust, headgasket, rings
-vacuum gauge to see if its a valve problem
-remove valve cover....crank it over and watch for rocker arm movement
the next possible steps imo would be:
-leak down test to determine where the loss is from,,,,intake, exhaust, headgasket, rings
-vacuum gauge to see if its a valve problem
-remove valve cover....crank it over and watch for rocker arm movement
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TahoeMatt
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Feb 6, 2012 7:15 PM
