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> Dealing with an engine with oil blow-by - hoping for some thoughts and coaching on options
Tdskip
post Jun 25 2019, 01:13 PM
Post #21


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OK - so here is the scoop on the '74 AZ car that has me about to learn new things.

This is the car that has the 2.0l case with 1.8 heads. Runs strong, good pulling power, no bad noises, and has good oil pressure. Came to me with a recently put together engine with no guarantees but believed to be redone heads and fresh bottom end. Price was right on everything so I bought it, no regrets.

The issue I am seeing is that the engine has too much blow-by. After a short time (under 30 miles) it started smoking very noticeably from the breather and blew out the oil seal on the breather tower.

Since then I've changed the oil and done more heat cycling and it's smoking significantly less (barely noticable now) but I still have too much blow-by. I don't think I have much to loose by driving it some more and seeing if the rings seat better but I am working on the expectation that isn't going to work.

Assuming the most likely case, which is that the rings don't seat any better, I believe I would need to pull the heads and pistons off and start again. Yes/no?

Should I be thinking of just replacing the jugs and pistons with a new set from AA or do these clean up (in general). I believe replacement is the usual approach these days.

I think I would plan to send the heads out for servicing as a precaution so I know I have good ones with good oil control going back on.

Assembly from this point should be pretty straight forward I'd think?

Thanks, appreciate the continuing education here.




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Tdskip   Dealing with an engine with oil blow-by - hoping for some thoughts and coaching on options   Jun 25 2019, 01:13 PM
rhodyguy   Does the fill tower have a hose nipple on it? Wher...   Jun 25 2019, 01:51 PM
Tdskip   Does the fill tower have a hose nipple on it? Whe...   Jun 25 2019, 02:06 PM
tejon007   OK - so here is the scoop on the '74 AZ car t...   Jun 25 2019, 05:02 PM
Tdskip   @tejon007 - thank you for the response. I didnâ...   Jun 25 2019, 05:34 PM
jcd914   Couple thoughts: Since you don't have history ...   Jun 25 2019, 10:40 PM
tejon007   Couple thoughts: Since you don't have history...   Jun 26 2019, 12:57 AM
Larmo63   The single Weber carb thing is never something you...   Jun 25 2019, 11:57 PM
914_teener   The single Weber carb thing is never something yo...   Jun 26 2019, 12:17 AM
Tdskip   The single Weber carb thing is never something yo...   Jun 26 2019, 09:53 AM
Tdskip   Breather set up - you can see where it blew out th...   Jun 26 2019, 12:30 PM
Tdskip   RE: Dealing with an engine with oil blow-by - hoping for some thoughts and coaching on options   Jun 26 2019, 12:31 PM
IronHillRestorations   Sounds like the only "magic pill" is at ...   Jun 26 2019, 03:06 PM
colingreene   you need to do a leak down test or otherwise this ...   Jun 26 2019, 03:27 PM
jcd914   you need to do a leak down test or otherwise this...   Jun 26 2019, 04:34 PM
tejon007   Interested to find out the solution...so, please s...   Jun 26 2019, 05:29 PM
Tdskip   Interested to find out the solution...so, please ...   Jun 27 2019, 11:20 AM
rhodyguy   Oil smoke from the carpet? <_< :WTF:   Jun 27 2019, 11:43 AM
Tdskip   @rhodyguy - oops! That was supposed to say â...   Jun 27 2019, 12:22 PM
Tdskip   @IronHillRestorations [b]@[url=http://www.914wor...   Jun 28 2019, 07:22 AM
tejon007   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jul 2 2019, 11:00 PM
IronHillRestorations   The biggest concern IMHO would be a broken ring, w...   Jun 28 2019, 08:51 AM
Jetsetsurfshop   I had this problem recently. My car wasn't dow...   Jul 3 2019, 01:53 PM
Jetsetsurfshop   https://youtu.be/AP65Q-l-jiM   Jul 3 2019, 02:06 PM
maf914   https://youtu.be/AP65Q-l-jiM Shane, Good video...   Jul 3 2019, 04:00 PM
Tdskip   Wow - that is way worse than what I’ve got. Bet ...   Jul 3 2019, 02:46 PM
Jetsetsurfshop   Wow - that is way worse than what I’ve got. Bet...   Jul 3 2019, 03:55 PM
Tdskip   Good morning gentlemen, happy Sunday to everyone. ...   Nov 3 2019, 08:20 AM
Tdskip   Now that the front suspension is sorted and most o...   May 4 2020, 02:51 PM
porschetub   Now that the front suspension is sorted and most ...   May 4 2020, 11:52 PM
sixnotfour   get rid of the valve thing , its not venting enoug...   May 4 2020, 03:31 PM
Tdskip   get rid of the valve thing , its not venting enou...   May 4 2020, 03:56 PM
sixnotfour   :flag1:   May 4 2020, 09:38 PM
JamesM   I think you need to back up and look at the extern...   May 5 2020, 12:47 AM
JamesM   Either one of these is what you are looking for 1...   May 5 2020, 01:22 AM
sixnotfour   Fix vent issues, all numbers will improve....Ferra...   May 5 2020, 01:02 AM
Tdskip   @JamesM - thanks for the follow-up. I think I hav...   May 5 2020, 07:01 PM
Tdskip   This looks like the right heather setup (putting a...   May 6 2020, 11:26 AM
JamesM   This looks like the right heather setup (putting ...   May 7 2020, 10:42 AM
Tdskip   Tube from the breather goes to the carburetor now....   May 6 2020, 11:49 AM
Tdskip   Plug #3 was oily, think I found the culprit.   May 6 2020, 10:19 PM
Tdskip   So - unless someone has more clever ideas (likely,...   May 7 2020, 06:32 AM
Tdskip   Ah - thanks, didn’t see the size difference. Tha...   May 7 2020, 10:43 AM
JamesM   Picture for size comparison.   May 7 2020, 10:12 PM
Tdskip   Good morning @JamesM , that makes it clear. Tha...   May 8 2020, 07:45 AM
Tdskip   Good morning gentlemen. Picked up a proper 2.0 L b...   May 30 2020, 08:05 AM
Superhawk996   Leakdown Gauge.   May 30 2020, 08:28 AM
Bleyseng   Leakdown Gauge. :agree: You have to see if its...   May 30 2020, 11:56 AM
Robarabian   Leakdown test. I had this happen on a car before...   May 30 2020, 01:05 PM
Tdskip   Thanks gentlemen   May 30 2020, 04:25 PM


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