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2004 chevy venture cranks but will not start after changing timing chain and it has no compression at all
2004 Chevrolet Venture

2004 Chevy venture cranks but will not start after changing timing chain and it has no compression at all

(2004 Chevrolet Venture)
Cranks but will not start has no compression timing has been replaced it is getting spark fuel pump is good it’s getting fuel to the motor it also just died while driving and it over heated everything Is turning inside the motor the water pump was turning backwards I bought the van from someone else and they put the belt on the water pump on backwards
What seems to make the problem better or worse? Nothing we have tried so far has helped
How long have you had this problem? 5 days
Tags: chevrolet, venture
1 answer & 4 comments
Popular Answer
on June 16, 2019

Firstly - the 3.4L engines simply do not give timing chain problems!

I really don’t know why that was replaced.

Lastly - it is more likely the engine has suffered major internal damage due to severe overheating.
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on June 16, 2019

IF engine gets severely overheated - the piston rings loose their ‘tension’ and thus the ability to properly seal against the cylinder walls - resulting in little or no compression.

▪️ Cylinder *leak down* testing will provide the answer ▪️

Now what you should do is add a couple tablespoons of transmission fluid to each of the ‘accessible’ cylinders and re-test compression - then post the results here for additional help.

Good luck!
on June 16, 2019

See additional information posted above.

IF no reply is posted - I can not help you fix this vehicle!
on June 16, 2019
The timing was replaced because the chain was loose and the guide was broken and it has been over heating due to the person who had it before me putting the pully bell on the water pump backwards
on June 16, 2019

All I can offer at this point is good luck!
General Diagnosis
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on June 16, 2019

Firstly - the 3.4L engines simply do not give timing chain problems!

I really don’t know why that was replaced.

Lastly - it is more likely the engine has suffered major internal damage due to severe overheating.
Sign in to reply
on June 16, 2019

IF engine gets severely overheated - the piston rings loose their ‘tension’ and thus the ability to properly seal against the cylinder walls - resulting in little or no compression.

▪️ Cylinder *leak down* testing will provide the answer ▪️

Now what you should do is add a couple tablespoons of transmission fluid to each of the ‘accessible’ cylinders and re-test compression - then post the results here for additional help.

Good luck!
on June 16, 2019

See additional information posted above.

IF no reply is posted - I can not help you fix this vehicle!
on June 16, 2019
The timing was replaced because the chain was loose and the guide was broken and it has been over heating due to the person who had it before me putting the pully bell on the water pump backwards
on June 16, 2019

All I can offer at this point is good luck!

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