Engine condition question
Looking to see if I am on the right track. I have a '70 GTO with a RAIII motor that runs very well. At idle you can see a very small amount t of smoke, which is not visible while driving. However, after the car sits for a bit I get a big cloud of smoke on startup.
My first thought was valve seals but the slight smoking at idle was still concerning. So, I got out my trusty 1980 Sears Compression tester and got these results, rounded to the nearest 5psi marker:
1. 155
2. 150
3. 180
4. 175
5. 150
6. 145
7. 150
8. 155
The least is only about 80 percent of the highest, so those numbers are not ideal, but is the low cylinder low enough to burn oil?
I have owned the car for a couple years and know nothing about the engine history or internals.
At this point I think valve seals are still a safe bet, especially since I am on a budget. All opinions are welcome!
John
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