|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
10-05-2019, 07:30 PM | #1 |
Junior Member
Join Date: Sep 2019
Location: Colorado
Posts: 28
|
#4 Piston Removal
I have a 38 ford with a bad wrist pin in #4. Is it possible to remove the piston from the bottom so I don't have to take off the head? The engine was rebuilt about 2-years ago and runs fine with the exception of #4. Compression is good and plugs clean. Any help would be appreciated. Thanks Larry
|
10-05-2019, 07:49 PM | #2 |
Senior Member
Join Date: May 2010
Location: Kerrville, Tx
Posts: 2,769
|
Re: #4 Piston Removal
Not a very good plan. The piston will not come out the bottom.
|
Sponsored Links (Register now to hide all advertisements) |
|
10-05-2019, 10:14 PM | #3 |
Senior Member
Join Date: Oct 2011
Location: Shelton, WA
Posts: 3,800
|
Re: #4 Piston Removal
What is the concern about removing the intake and 1 head? Do it right.
|
10-05-2019, 10:50 PM | #4 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,572
|
Re: #4 Piston Removal
i drove an old 77 white truck for ten years with a knock that had been going on for years before i got in it, thought to be a wrist pin. cummins 250 diesel, probably 100k miles of knocking and still ran fine when they sold it. just a fun story, but i agree with the others-take the head off and see for sure whats going on
|
10-06-2019, 08:26 AM | #5 |
Senior Member
Join Date: May 2010
Location: Chester Vt
Posts: 8,860
|
Re: #4 Piston Removal
How do you know it's a wrist pin??
|
10-06-2019, 09:58 AM | #6 |
Senior Member
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,426
|
Re: #4 Piston Removal
Sponsored Links (Register now to hide all advertisements)
|
10-06-2019, 01:25 PM | #7 |
Senior Member
Join Date: May 2010
Location: so cal, placerville, vegas
Posts: 1,394
|
Re: #4 Piston Removal
|
10-07-2019, 06:34 AM | #8 |
Senior Member
Join Date: May 2010
Location: Auburn, MA
Posts: 2,106
|
Re: #4 Piston Removal
Even if it could come out from the bottom it won't be going in easy from the bottom.
I once reconditioned a rod for an MG or Triumph, I forget by getting the piston low enough to remove the wrist pin. Needed a special pair of snap ring pliers. There was not ebough room to get the piston past the webbing.
__________________
“The technique of infamy is to start two lies at once and get people arguing heatedly over which is true.” ~ Ezra Pound |
10-07-2019, 07:13 AM | #9 |
Junior Member
Join Date: Sep 2019
Location: Colorado
Posts: 28
|
Re: #4 Piston Removal
Looks like it will come out from the top. I was just trying to look at all options. Experience tells me it is a wrist pin. It has had the noise for quite a while and never gets any worse. It does not sound like piston slap as I have had an engine with that problem. Thanks for the responses. Larry
|
10-07-2019, 07:19 AM | #10 | |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,312
|
Re: #4 Piston Removal
Quote:
|
|
10-07-2019, 07:10 PM | #11 |
Senior Member
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,627
|
Re: #4 Piston Removal
Ditto Ron. What is the basis for your diagnosis? Valve noise can be mistaken for wrist pin. Check the valve clearance on #4 before you tear it down.
|
10-08-2019, 07:40 PM | #12 |
Junior Member
Join Date: Sep 2019
Location: Colorado
Posts: 28
|
Re: #4 Piston Removal
sdI have been using the "if it ain't broke don't fix it for a few years" and it may last a few more years. Thanks for the responses. Larry
|
10-08-2019, 09:05 PM | #13 |
Senior Member
Join Date: May 2010
Location: Star, MS
Posts: 4,024
|
Re: #4 Piston Removal
I bought a running '57 Ranchero with a 292 back in the 70's. It had a little light tap in the top end. I ran the engine for quite a while. Then one day I was driving about 65 mph and suddenly I heard "th-th-th-BANG". I mashed the clutch, looked in the rear view mirror, and saw oil in the road behind me. The rod had broken below the piston and wiped out the block. I could wiggle the rod stub on the piston pin when I tore it down. My theory was that the bushing wasn't level on the pin and was causing the rod to bend slightly with every stroke, resulting in fatigue/failure.
|
10-08-2019, 09:39 PM | #14 |
Senior Member
Join Date: Jun 2010
Location: Oxford New Zealand
Posts: 177
|
Re: #4 Piston Removal
Try shorting the spark on that cylinder while idling and hear if the noise changes.Cheers
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|