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| | | | Joined: Apr 2020 Posts: 102 'Bolter | | 'Bolter Joined: Apr 2020 Posts: 102 | So, I pulled the motor out of the truck since it was smoking on acceleration. Seems like it could be the rings, not sure. Compression check proved that even when I added oil to the cylinders, it did not change the compression, stayed right at 155-160 for all cylinders.
It is out of the truck and I am considering taking it to a machine shop, just not sure if I want to put that much money into it. On the other hand, I may just hone the cylinders, check bores, and install new rings.
Anyone in this area know of a good shop? Maybe around Orange or Santa Ana CA? I am in Rancho Santa Margarita, a bit further south.
Thanks!
1963 C20, 292 (4.8L). 4-speed.
| | | | | Joined: Sep 2010 Posts: 2,318 'Bolter | | 'Bolter Joined: Sep 2010 Posts: 2,318 | I thought that if you put oil in the cylinders if the rings were worn the compression would go up .Maybe just the head needs to be freshened up,but I am no expert would have been better to diagnose it while still in the truck | | | | | Joined: Feb 2004 Posts: 29,821 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,821 | Try a cylinder leakdown test instead of relying on compression alone. 155-60 is excellent compression for a stovebolt engine- - - -it sounds like you're dealing with loose intake valve guides, not ring trouble. Most likely, a valve job will put you back in business- - -no need to change the rings unless there are other problems such as badly taper-worn cylinders, which will also require reboring the cylinders and installing oversize pistons.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Apr 2005 Posts: 2,098 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,098 | George,
You said previously the truck had sat for some time. As stated above, it sounds more like valve guides and or seals.
If it needs head work or a rebuild you can contact Jay at Surf City Machine, just off Beach Blvd near Slater. 714-848-1062.
I just had some work done there on a Willys M38.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
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