3406E oil pressure

Mine is a 1LW and has roughly 370k on a CAT overhaul. I go down the road with 70 psi oil pressure # 1600 rpm with everything at operating temp. It idles # 40 psi hot. I'm using the Mobil Delvac oil. I used to run the Lucas in it but since its over $30 a gallon now, I never put it in anymore. I asked about using Lucas at the Cat dealer up in Denver and they don't recommend any additives.

 

My c-15 is about to hit 300k and the oil pressure is around 60psi under full throttle and 30 at idle (hmm, better check the level in the morning.) 40-55 just cruising on the interstate. I've driven 4 other cats that were about the same way if I remember right. It has some wear on it but I don't think it's a problem (yet.) Might ask a few mechanics and keep an eye on it though.

 

get an oil sample done that will tell you wear yours sounds lower than normal probably needs rods and main bearings usually can be done in one day under $1000

 

i bought my truck with 6ts 3406e in it three years from now, engine had 350k, oil pressure always 45 psi at 1600 rpm. cat dealer said it is ok as far as it stays at the same level. it is over 600k now and it is 45 psi at cruising.

 

possible the seals on the oil pump r going but that pressure is ok

 

There are no seals in the oil pump! There are end plates and bushings that wear along with mains and rod bearing that would cause 10 pound oil loss.Check your oil pressure gauge first with a known good gauge. The milage you posted is due for a bearing roll in.Check oil pump and check to see if you have the correct oilers while you have the oil pan down. You could also check oil pressure at the front cover then check it at the filer base and compare readings.

 

Pan and oil pump bolts - 55 ± 10 N·m (40 ± 7 lb ft)
Rod bolts- 90 ± 8 N·m (65 ± 6 lb ft) plus 90 ± 5 degrees (1/4 turn)
Main bolts- 260 ± 14 N·m (190 ± 10 lb ft) plus 120 ± 5 degrees (2 flats)