# Insane crankcase vacuum

**URL:** <https://community.cartalk.com/t/insane-crankcase-vacuum/57644>\
**Category:** Maintenance/Repairs\
**Tags:** gmc, 3500\
**Created:** [November 16, 2010, 8:11pm UTC](https://community.cartalk.com/t/insane-crankcase-vacuum/57644 "2010-11-16T20:11:21Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![Tony-212](https://avatars.discourse-cdn.com/v4/letter/t/f4b2a3/32.png) [@Tony-212](https://community.cartalk.com/u/Tony-212)\
**Post date:** [October 2, 2020, 11:29pm UTC](https://community.cartalk.com/t/insane-crankcase-vacuum/57644/21 "2020-10-02T23:29:47Z")

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maybe valves not seating completely. I hear vacuum on one side of my engine bit not the other. Timing belt broke I replaced it about 9 months later high vacuum thinking valves got bent or just byrned out.

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