Express2500 4.8l low compression
November 13th, 2020, 7:25 PM
#1
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 ?
November 14th, 2020, 2:18 AM
#2
I would never buy a 3/4t van with a 4.8L engine.
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Kael (November 17th, 2020)
November 14th, 2020, 7:52 PM
#4
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
November 14th, 2020, 7:55 PM
#5
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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