Valve train vibration, smoke

Tiny
JASFACE10
  • MEMBER
  • 1993 MAZDA 323
  • 1.6L
  • 4 CYL
  • 2WD
  • MANUAL
  • 300,000 MILES
I noticed the oil pan leaking some and I wanted to make sure the strainer area down there was clean so I resealed the oil pan and let it cure. When I went to refill the oil system I only had about two quarts and some used oil. So I added about a quart of it but it was dirtier than I thought. When I drove it was making like a sucking strangling sound when I would go to accelerate and would not really accelerate but would pop a little and resist it. I took off the valve cover and noticed that one of the oil ports was plugged with some sediment from that old oil. I flushed and sea foamed it and and replaced the lifters (hydraulic) and it is back to making good power, but there is still a littler of that sucking sound under acceleration and it smokes at lower rpm and idles a little rough when it warmed up all the way. Also, I can hear some vibration in the valve train when I start it up. Any recommendations?
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Tuesday, August 28th, 2018 AT 10:32 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,554 POSTS
The sucking sound do you know where is is coming from? Can you take a quick video of the noise with you phone and upload it in your response? That way we do not have to guess.

Please let me know. Cheers, Ken
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Thursday, August 30th, 2018 AT 10:21 AM
Tiny
JASFACE10
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  • 2 POSTS
The valve train. That is where it is coming from. It is an issue of where I put the dirty oil.
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Wednesday, September 5th, 2018 AT 1:35 PM
Tiny
KEN L
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  • 42,554 POSTS
Can it be an engine vacuum leak? How does the engine seem to run?
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Thursday, September 6th, 2018 AT 10:15 AM
Tiny
JASFACE10
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  • 2 POSTS
I explained it all in the description.
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Friday, September 7th, 2018 AT 6:13 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,554 POSTS
Sorry, can you please shoot a quick video with your phone so we can hear the noise? That would be great. You can upload it here with your response.
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Friday, September 7th, 2018 AT 6:15 PM

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