Re: Engine rebuild, help!
Posted by moodydavid16 On 2023/9/28 10:41:41
Hello all, I am once again having a little trouble, but first a little update.
Since my last post I have gotten my engine in the car, but unfortunately I made a silly Mistake and didn’t put the lifters back in the correct order and had zero compression on most cylinders, so unfortunately I needed to take it apart again. However, the first time around I somehow got away with rebuilding it in the living room but my parents weren’t too happy with that so that wasn’t an option so I decided to send it out to a machine shop and just pay to have them do all the work over again. I gave them my shop manual for all the clearances, torque specifications, etc. I got it back again and now have it in the car once again.
Now I am having trouble starting. My first concern is that I have low compression on a few cylinders. I will attach a picture of my results (picture 1) the night before this test I put oil in the cylinders so this would be a wet test. I can tell the low compression is from blow by. My question is will this blow by go away once the rings seat?
My second question- and main concern is timing.
I am simply stumped as to what is going on with this.
I set my engine so cylinder 1 is at 6 degrees before TDC of its compression stroke. (Picture 2)
Then I ensure the distributor rotor is pointing to approximately the 7:30 position (picture 3)
I then turn the engine over until the spark occurs and it is at approximately 90 degrees AFTER TDC. (Picture 4)
Attach file:
IMG_2114.jpeg (170.75 KB)
IMG_2106.jpeg (343.46 KB)
IMG_2107.jpeg (302.97 KB)
IMG_2111.jpeg (291.26 KB)
Since my last post I have gotten my engine in the car, but unfortunately I made a silly Mistake and didn’t put the lifters back in the correct order and had zero compression on most cylinders, so unfortunately I needed to take it apart again. However, the first time around I somehow got away with rebuilding it in the living room but my parents weren’t too happy with that so that wasn’t an option so I decided to send it out to a machine shop and just pay to have them do all the work over again. I gave them my shop manual for all the clearances, torque specifications, etc. I got it back again and now have it in the car once again.
Now I am having trouble starting. My first concern is that I have low compression on a few cylinders. I will attach a picture of my results (picture 1) the night before this test I put oil in the cylinders so this would be a wet test. I can tell the low compression is from blow by. My question is will this blow by go away once the rings seat?
My second question- and main concern is timing.
I am simply stumped as to what is going on with this.
I set my engine so cylinder 1 is at 6 degrees before TDC of its compression stroke. (Picture 2)
Then I ensure the distributor rotor is pointing to approximately the 7:30 position (picture 3)
I then turn the engine over until the spark occurs and it is at approximately 90 degrees AFTER TDC. (Picture 4)
Attach file:
IMG_2114.jpeg (170.75 KB)
IMG_2106.jpeg (343.46 KB)
IMG_2107.jpeg (302.97 KB)
IMG_2111.jpeg (291.26 KB)
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