How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Don 'Mo Lurch' Your Own Que...
Don 'Mo Lurch'
Don 'Mo Lurch', Classic Car Mechanic
Category: Classic Car
Satisfied Customers: 20901
Experience:  Heavy Line Mech-, Mobile Electronics. Sales, Installation & Repair for 30 years. R/S, etc.
Type Your Classic Car Question Here...
Don 'Mo Lurch' is online now
A new question is answered every 9 seconds

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.


sorry for the delay............
Greetings...... “Hi, I’m Don (aka MOLurch) and I look forward to helping you!”
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

IF you need more information, please ask "prior" to Rating.
Please do the right thing and leave a rating, using the rating system, so I may be credited for this Q&A.
NOTE: Do NOT Rate on how much TIME you waited, because I am not on 24 / 7 and I answer as soon as I see the question.
The question will still remain open for follow up questions if needed.
If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT today.
Please reply and let me know why, so I can help more/better.
Rating is very Important to our Service