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View Full Version : 3800 Series II Knowledge Needed Please!


IDOXLR8
03-24-2007, 01:27 PM
I have a 1997 3800 that had a upper intake manifold fail and let coolent into the cylinders and the engine ran hot and shut down. I found no coolant in the oil so I installed a new improved upper intake and it ran great for 2 days and started having a valve tap, any ideas on what happen here? Thanks AL.
buickgs464
03-24-2007, 10:29 PM
i've changed many intakes,have seen lifter noise also.did you change oil also?possible dirt,moisture in oil.series II should all be roller cam/rockers-not adjustable.did this engine hydrolock? i have had a couple bend connecting rods,causing piston noise.good luck,dan
IDOXLR8
03-24-2007, 10:40 PM
i've changed many intakes,have seen lifter noise also.did you change oil also?possible dirt,moisture in oil.series II should all be roller cam/rockers-not adjustable.did this engine hydrolock? i have had a couple bend connecting rods,causing piston noise.good luck,dan

It did hydrolock on a restart before I installed the new intake when I tried to start it a couple times. As far as the oil I did change it but saw no coolant in the oil. I don't understand why the engine would run perfect after the repair then have a upper end oiling problem, AL.
IDOXLR8
03-25-2007, 08:07 PM
This makes NO sense!!!! I started the Olds LSS and the tap faded then is gone!!!!! ?????????? I don't get it!!!!! AL.
GSXMEN
03-25-2007, 10:30 PM
Al - You might try some Seafoam in the crankcase. I usually do half a can, put the rest in the tank.

Run it several hundred miles and then maybe have a power flush done at one of the Quick Lube places.
IDOXLR8
03-25-2007, 10:34 PM
Al - You might try some Seafoam in the crankcase. I usually do half a can, put the rest in the tank.

Run it several hundred miles and then maybe have a power flush done at one of the Quick Lube places.

Scott, this has been a wild set of events on this car! We will do a internal cleaning and see how she goes. Thanks! AL.
alec296
04-08-2007, 10:28 PM
Al - You might try some Seafoam in the crankcase. I usually do half a can, put the rest in the tank.

Run it several hundred miles and then maybe have a power flush done at one of the Quick Lube places.

seafoam= mechanic in a can
helps but sometimes it goes back to how it was
does eveyone know this trick?
IDOXLR8
04-09-2007, 11:59 AM
Well a few weeks has gone by and she is still quiet! Thanks for the continued support! :beer AL.