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Ask Don 'Mo Lurch' Your Own Que...
Don 'Mo Lurch'
Don 'Mo Lurch', Classic Car Mechanic
Category: Classic Car
Satisfied Customers: 20515
Experience:  Heavy Line Mech-, Mobile Electronics. Sales, Installation & Repair for 30 years. R/S, etc.
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Trying to help my son who has been told the engine in s 68

Customer Question

Trying to help my son who has been told the engine in his 68 Chevelle has lost compression in all cylinders. I had this engine rebuilt by a corvette speed shop 25 years ago (40,000 miles now) with a 3/4 cam, keith black pistons, b&b. Wanted the car I couldn't afford as a kid! I don't respect what my son tells me about the shop he has taken it too. They say 2 choices: rebuild or crate motor. I suspect BS. What should he look for to determine if it is a specific problem or it's just warn out. Could all the rings go at once?
Submitted: 1 year ago.
Category: Classic Car
Expert:  Don 'Mo Lurch' replied 1 year ago.

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sorry for the delay............
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Greetings...... “Hi, I’m Don (aka MOLurch) and I look forward to helping you!”
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1) perform a compression test yourself on ALL cylinders wet & dry.......not that hard to do
2) does the Distributor Rotor turn when cranking......If not, cam or Timing Chain is broken or bad, leaving a number of Valves open, which would cause no compression
3) if you are unable to do the above, have a "reputable" shop do it for you & this will give you a second opinion
It is highly unlikely that ALL cylinders have NO compression

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