Rebuilt engine making a gulping sound?

1998 CHEVROLET BLAZER
201,000 MILES • 4.3L • V6 • 2WD • AUTOMATIC
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BRIBRI4275
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Just rebuilt the engine on the vehicle listed above. It's that 4.3l v6 vortec engine. I put it all back together and now when I try to start it, it makes a like a gulping sound. I don't know why it's doing this.
Nov 7, 2021 at 3:22 PM
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JACOBANDNICKOLAS
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Hi,

Other than the sound, is it running? Also, is it loud enough for you to record and upload?

However, the normal cause of gulping type noises is due to a timing or compression issue. So if you just rebuilt the engine, I would suggest starting with checking the compression and make sure it is correct.

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

Let me know. I just need a little more information.

Take care,

Joe
Nov 7, 2021 at 9:46 PM