Todd Savage
Newbie
posted yesterday about valve cover gaskets, but I got bigger issues than that. Started missing yesterday, so today I pulled the plugs and #1 plug was almost completely ashed over but it wasn't white ash it was tan colored ash. went ahead and pulled all 8 and two others were somewhat ashed up, but the other 5 looked ok. ran compression check and here's where the bad news comes in.
1-85 2-150
3-171 4-115
5-180 6-175
7-96 8-168
Double checked #1 just to be sure, read 85 again. squirted a little oil in cylinder, rechecked, came up to 112
Truck has 139k on the odometer. I assume it's right due to running the VIN and the mileage adds up to where it should be. Still doesn't mean it's the original engine I guess, but then it again it could be original. Here's my question. How do I determine if it's rings or a valve issue? It goes up and down the road just fine. I wouldn't have ran compression check if the 3 ashed plugs looked ok like the other 5. That's what made me want to check. Comments appreciated.
1-85 2-150
3-171 4-115
5-180 6-175
7-96 8-168
Double checked #1 just to be sure, read 85 again. squirted a little oil in cylinder, rechecked, came up to 112
Truck has 139k on the odometer. I assume it's right due to running the VIN and the mileage adds up to where it should be. Still doesn't mean it's the original engine I guess, but then it again it could be original. Here's my question. How do I determine if it's rings or a valve issue? It goes up and down the road just fine. I wouldn't have ran compression check if the 3 ashed plugs looked ok like the other 5. That's what made me want to check. Comments appreciated.