Motor knock
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
-
Topic author - Posts: 32
- Joined: Sun Jan 06, 2019 12:52 pm
- First Name: Harold
- Last Name: Chambers
- * REQUIRED* Type and Year of Model Ts owned: 1925 fordor. 1923 touring
- Location: Winfield tn.
- MTFCA Number: 50278
Motor knock
I have a 25 t about 35 mph when the motor is running free I have a clapping sound when I give it gas the noises goes away when motor is holding back no noise. I have plastic gauge rods and mains they r within spec. Could it possible be a pistol slap? it has .040 over I put new pistons and rings in it.I have drove it several thousand miles sense then it's no worse or better. that noise is driving me nuts. Thanks in advance Harold.
-
- Posts: 238
- Joined: Sun Jan 06, 2019 12:09 pm
- First Name: Philip
- Last Name: Thompson
- * REQUIRED* Type and Year of Model Ts owned: 1924 touring
- Location: Graham NC
Re: Motor knock
Mind tends to make that sound when I have the spark too advanced. My chapter
Bought one of the solid-state coil testers we put new capps. And points in the coils and set them.
Now I don't need as much advance. Philip
Bought one of the solid-state coil testers we put new capps. And points in the coils and set them.
Now I don't need as much advance. Philip
-
- Posts: 12
- Joined: Wed Jan 09, 2019 9:48 am
- First Name: Frank
- Last Name: Harris
- * REQUIRED* Type and Year of Model Ts owned: 1913 Mountain Wagon
- Location: Long Beach, CA
Re: Motor knock
Some times the connecting rods can get twisted and will cause a knock. We had a 1913 that had that issue. Straightened the rods and the knock went away.
-
- Posts: 177
- Joined: Tue Jan 29, 2019 10:21 am
- First Name: John
- Last Name: Dow
- * REQUIRED* Type and Year of Model Ts owned: 1923 Touring
- Location: Leawood, Ks
- MTFCA Number: 32344
- Board Member Since: 2015
Re: Motor knock
Harold, Do you by chance have an aluminum high compression head? I do and I had a very similar loud knock as you described. It drove me crazy trying to find the cause. It turned out to be pre-ignition engine knock. I found by running 91 octane and using a little less advance the noise went away.
-
Topic author - Posts: 32
- Joined: Sun Jan 06, 2019 12:52 pm
- First Name: Harold
- Last Name: Chambers
- * REQUIRED* Type and Year of Model Ts owned: 1925 fordor. 1923 touring
- Location: Winfield tn.
- MTFCA Number: 50278
Re: Motor knock
Don't have high compression head but have high compression pistons.I will try what you did.Thanks
-
- Posts: 177
- Joined: Tue Jan 29, 2019 10:21 am
- First Name: John
- Last Name: Dow
- * REQUIRED* Type and Year of Model Ts owned: 1923 Touring
- Location: Leawood, Ks
- MTFCA Number: 32344
- Board Member Since: 2015
Re: Motor knock
Harold, I bet you have the same problem! Hopefully, you can solve it as I did. Please follow up and let us know the result.