Low compression in 3 & 4 CAUSES ?????????original 27,000 miles never apart
I have a '95 fullsize with original 350 and ORIGINAL 27,000 miles...never apart.....developed a slight miss, checked compression, 3 & 4 had 50 & 55 lbs, all other cyl. had 120 lbs.......havnt taken it apart yet....Any clues or hints what to look for before I start???? thanks
burnt valves, leaking head gasket or busted piston ring lands.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
+1Originally Posted by RedHeartbeat
hopefully it's the head gasket, much easier/cheaper fix
2000 ECSB 5.3L with K&N CAI, true duals with flowmaster 40s, and 200k miles!
Sorry guys, adjoining cyl's 3 & 5, was in a hurry when posting..........that's why I thought the head gasket may be the problem
Yea adjacent cylinders so it sounds like a head gasket so u may be lucky there. But the worse thing u can do for an engine is let it sit. Fix it and run it good and often
04 RCSB 5.3, Homemade 80mm FM, TU1, TH400
Do a leak down test with the valves closed and the plugs out, that will tell you every thing you need to know.
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
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