The Ford Barn

32philly · 08-25-2023, 06:49 PM

1932 heads take the larger plugs like those in the Model B. Anyone have a recommendation for those ?

BobR35 · 09-27-2023, 07:20 PM

Quote:

Originally Posted by dean333

Seth, my 85hp 37 has about 70lbs compression across the board and runs like a raped ape, no loss of oil.

That's what I'm experiencing with my '35, testing lo on all cyl, one at 40, one up to 90 on the high side. Two at 80, two at 60 and two at 70. She starts up right away and I've driven her on a 100 mile trip a week ago, no problems. I just did the comp test today and now i'm concerned! Should I be? Doesn't use any amount of oil and no smoke! I'm guessing valve job in order.

BobR35 · 09-27-2023, 07:26 PM

So, I'm wondering if a cold compression test is more accurate or a hot one or does it make a difference? I know I have issues but it runs fine. Any ideas?
Thanks

GB SISSON · 09-27-2023, 07:58 PM

I was always told to do a compressin test on a fully warmed up engine. And as stated the gas pedal needs to be to the floor. I usually cut a stick that fits between the floored pedal and the seat. You said it was rebuilt but not when. 25 years setting in a garage? Either was things stick. Rings, valves etc. I always introduce some marvel mystery oil to the gas and the oil and run it hard. Has worked wonders for me. As far as you 'having issues', don't worry we all do or we wouldn't be owning and working on these old cars.

BobR35 · 09-28-2023, 10:04 AM

Thanks GB for your much appreciated info, I did the test cold and I'll do another one warm and also with the throttle open.
The car was redone in the early 90's and I've had her about 3 yrs now and put roughly 1400 miles on her. I love driving the old car to shows or just around town, gets a ton of attention!
Thanks again and I'll let you know the results when I re- test.

Seth Swoboda · 09-28-2023, 10:13 AM

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Quote:

Originally Posted by BobR35

That's what I'm experiencing with my '35, testing lo on all cyl, one at 40, one up to 90 on the high side. Two at 80, two at 60 and two at 70. She starts up right away and I've driven her on a 100 mile trip a week ago, no problems. I just did the comp test today and now i'm concerned! Should I be? Doesn't use any amount of oil and no smoke! I'm guessing valve job in order.

Drive it for as long as you can stand it. I finally got tired of adding oil, the blow by out of the breather and clutch chatter from a wet clutch disk. If your engine is giving you satisfactory proformance, enjoy it as is.

BobR35 · 09-29-2023, 02:58 PM

Quote:

Originally Posted by Seth Swoboda

Drive it for as long as you can stand it. I finally got tired of adding oil, the blow by out of the breather and clutch chatter from a wet clutch disk. If your engine is giving you satisfactory proformance, enjoy it as is.

Yes, I think that's exactly what I'm going to do Seth. I drove it 60 miles today to a friend's hanger and we did a warm compression test and results were a little different/better but still on the low side. She runs great, uses no oil and no smoke so I'm gonna keep driving her and enjoy the ride!

petehoovie · 09-29-2023, 03:47 PM

Quote:

Originally Posted by BobR35

Yes, I think that's exactly what I'm going to do Seth. I drove it 60 miles today to a friend's hanger and we did a warm compression test and results were a little different/better but still on the low side. She runs great, uses no oil and no smoke so I'm gonna keep driving her and enjoy the ride!

aussie merc · 10-01-2023, 02:17 AM

every engine is different what you are looking for is the difference between cylinders. Any difference above 10% is a concern make sure engine is at operating temp, all plugs removed and throttle is held wide open then cranks till it doesn't increase usually about 3 times .Record readings and then repeat after dropping about 5 drops of eng oil into each cylinder in turn record readings and compare should be a slight rise in compression but not dramatic

08-25-2023, 06:49 PM	#21
32philly Junior Member Join Date: Nov 2022 Location: Idaho Posts: 8	Re: Poor Compression 221 2 cyl's 1932 heads take the larger plugs like those in the Model B. Anyone have a recommendation for those ?

09-27-2023, 07:26 PM	#23
BobR35 Senior Member Join Date: Dec 2020 Location: Pt. St. Lucie, FL Posts: 104	Re: Poor Compression 221 2 cyl's So, I'm wondering if a cold compression test is more accurate or a hot one or does it make a difference? I know I have issues but it runs fine. Any ideas? Thanks

09-27-2023, 07:58 PM	#24
GB SISSON Senior Member Join Date: Jan 2014 Location: Orcas Island Washington Posts: 5,179	Re: Poor Compression 221 2 cyl's I was always told to do a compressin test on a fully warmed up engine. And as stated the gas pedal needs to be to the floor. I usually cut a stick that fits between the floored pedal and the seat. You said it was rebuilt but not when. 25 years setting in a garage? Either was things stick. Rings, valves etc. I always introduce some marvel mystery oil to the gas and the oil and run it hard. Has worked wonders for me. As far as you 'having issues', don't worry we all do or we wouldn't be owning and working on these old cars. __________________ Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1946 Tonner Pickup with 226 H six, 1979 Toyota landcruiser wagon, now wearing 1947 Ford Jailbar sheet metal. 'Rusty ol' floorboards, hot on their feet' (Alan Jackson)

09-28-2023, 10:04 AM	#25
BobR35 Senior Member Join Date: Dec 2020 Location: Pt. St. Lucie, FL Posts: 104	Re: Poor Compression 221 2 cyl's Thanks GB for your much appreciated info, I did the test cold and I'll do another one warm and also with the throttle open. The car was redone in the early 90's and I've had her about 3 yrs now and put roughly 1400 miles on her. I love driving the old car to shows or just around town, gets a ton of attention! Thanks again and I'll let you know the results when I re- test.

10-01-2023, 02:17 AM	#29
aussie merc Senior Member Join Date: Sep 2016 Location: sydney australia Posts: 1,049	Re: Poor Compression 221 2 cyl's every engine is different what you are looking for is the difference between cylinders. Any difference above 10% is a concern make sure engine is at operating temp, all plugs removed and throttle is held wide open then cranks till it doesn't increase usually about 3 times .Record readings and then repeat after dropping about 5 drops of eng oil into each cylinder in turn record readings and compare should be a slight rise in compression but not dramatic