Nut124 wrote:You might be able to adequately find TDC by feeling crank resistance.
Take plugs out. At TDC the crank should turn easy, by hand a few degrees, maybe +/-5 deg or so. TDC is in the middle of this easy movement.
Timing belt needs to be out for this.
Common oil leaks?
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carpenduh
- Posts: 15
- Joined: Sat Aug 08, 2020 7:22 pm
- Your car is a: 1970 spider 124
- Location: Maine
Re: Common oil leaks?
Belt is off, I think part of the issue I had was being used to working with V8s, I was going on the assumption of TDC cylinder 1. From what I am seeing I should have been looking at number 4, correct?
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18Fiatsandcounting
- Posts: 3798
- Joined: Fri Mar 15, 2019 11:23 pm
- Your car is a: 1969 and 1971 124 spiders
- Location: San Francisco Bay Area
Re: Common oil leaks?
On these engines, cylinders #1 and #4 are at the same point, that is, if one is at TDC then the other will be as well. So, you can use either to find TDC. #2 and #3 are 180 degrees out, so they would be at BDC when #1 and #4 are at TDC.
-Bryan
-Bryan
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Nut124
- Posts: 748
- Joined: Wed Oct 25, 2017 6:39 pm
- Your car is a: 1978 124 Spider 1800
Re: Common oil leaks?
The crank does not know the difference between #1 or #4 firing. TDC1 is the same as TDC4. The head and ignition do care. The cam timing marks are indeed #4 firing. #1 in cam overlap.carpenduh wrote:Belt is off, I think part of the issue I had was being used to working with V8s, I was going on the assumption of TDC cylinder 1. From what I am seeing I should have been looking at number 4, correct?
Nut124 wrote:You might be able to adequately find TDC by feeling crank resistance.
Take plugs out. At TDC the crank should turn easy, by hand a few degrees, maybe +/-5 deg or so. TDC is in the middle of this easy movement.
Timing belt needs to be out for this.
Does the crank easy turning make sense, work for you?