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Cranks but no start after replacing bent valve

Tiny
JAYNUM
  • MEMBER
  • 2003 BMW 745
  • 4.4L
  • V8
  • RWD
  • AUTOMATIC
  • 182,000 MILES
Replaced bent exhaust valve reassembled everything now car will not start only cranks. What could I have over looked or need to do? No stored codes only one pending po365 and po367 came up once then went back to po365 pending. Transmission fail-safe drive moderately showed up on dash.
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Wednesday, June 21st, 2017 AT 9:21 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

We must start by checking the compression is see if the valve timing is close.

Here are a guide to get you started.

https://www.2carpros.com/articles/how-to-test-engine-compression

Please let us know what happens.

Cheers, Ken
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Friday, February 12th, 2021 AT 10:17 AM

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