Hydro Lock

Tiny
ROGERLISAG
  • MEMBER
  • 1999 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 86,000 MILES
In the 3800 series buick engine I suffered hydro lock due to intake failure. Plan on changing lower and upper intake before doing so would like to know is that cause or is it the intake itself
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Tuesday, March 29th, 2011 AT 12:55 AM

5 Replies

Tiny
PROTECH1980
  • EXPERT
Very common for upper intake (black plastic) to fail on this 3.8L, what happens is there is a egr pipe that comes up into the upper intake, the pastic around the pipe gets burned over time and melts causeing the coolant channel in the intake to rupture flooding the cylinders with coolant causing hydrolock, the replacement upper intake will come with a redesigned egr pipe to prevent it from happening again.
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Tuesday, March 29th, 2011 AT 2:50 AM
Tiny
ROGERLISAG
  • MEMBER
The plastic that melts is it noticable? Did not really see any obvious signs - did not look bad?
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Wednesday, March 30th, 2011 AT 1:14 AM
Tiny
PROTECH1980
  • EXPERT
Only noticeable after removal, on the inside of the upper intake, if you pull that upper intake off and it is full of coolant underneath, that upper intake will be the culprit.
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Wednesday, March 30th, 2011 AT 1:35 AM
Tiny
ROGERLISAG
  • MEMBER
Ok we have done everything turned it over Smoke was burning off temperature was fine drove it fine. Turn on today and let run and the smoke was gone but now the check engine light came on - do you think changing the oil after all this will help? Any other helpful thoughts?
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Saturday, April 2nd, 2011 AT 7:38 PM
Tiny
PROTECH1980
  • EXPERT
YES, change the oil now, there is surely some coolant in the crankcase oil, and that is not good, get it changed because it can cause engine failure. Antifreeze is like sandpaper on bearings. The check engine light is probaly for o2 sensors because of the antifreeze in the exhaust, but you would have to get it scanned to know for sure.
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Sunday, April 3rd, 2011 AT 1:29 AM

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