94 4.3l lost compression 1-3-5

[MIFUN3]

Hi guys quick topic, need help .

Only had a few minutes to check but found no compression on 1-3-5 Checked with bore cameras valves are opening and closing, head gasket? Have access to a clean 94 silverado 1500 4.3 engine ??? Suggestions ?

 

[havoc_squad]

Did you do a leak down test yet?

That's going to tell you quickly where the direction of the air force is primarily going (head gasket, lower end, head/valves)

Don't take the engine head off or more until you identify where the relevant leakage is coming from first using a leak down test.

 

[alldodge]

Hi guys quick topic, need help .

Only had a few minutes to check but found no compression on 1-3-5 Checked with bore cameras valves are opening and closing, head gasket? Have access to a clean 94 silverado 1500 4.3 engine ??? Suggestions ?

Blown head gasket, might be an easy fix with a valve job and flatness check on original motor. The 1500 motor would be a good swap

 

[Lou C]

Those engines are pretty easy to take apart and simple to repair, I had to use an impact gun to get the cyl head bolts out because of raw water cooling in the salt water. I would do a leak down test first. You can still get reman heads for the pre vortec heads, or get yours redone if they just need to be magnafluxed checked for flatness & a valve job.