I6 Identification? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67JimmyMO · 07-03-2021, 04:53 PM

I have been working on "restoring" a 65 K10 for use as a farm vehicle here in SW Missouri for about a year.

To date I have rebuilt the front axle (kingpins/bearings/seals), new brakes all around and rebuilt all 3 driveshafts. Also installed a mini-spool in the rear diff as this truck will never see pavement.

When I got the truck the 230 that was in it was locked up tight but I planned on beating it apart and and doing a full rebuild.

That plan changed when I took the head off and discovered the #5 piston was gone and there's a hole in that cylinder big enough to throw a small cat through!

I just recently acquired a 250 6 popper and was hoping the group here could help me identify the year of this motor. I think it may be somewhat newer as it has an OEM HEI unit in it, but I suppose that could have been added.

The code stamped near the HEI is: F0825CCF

I can provide some casting numbers too if needed, thanks.

**The Rocknrod** · 07-03-2021, 06:43 PM

Can you provide a picture of the passenger side of the engine?

67JimmyMO · 07-04-2021, 09:41 AM

Quote:

Originally Posted by The Rocknrod

Can you provide a picture of the passenger side of the engine?

I started tearing it down yesterday, let me know if you need more, thanks.

geezer#99 · 07-03-2021, 10:26 PM

This list shows 76 or 77 250 has suffix code CCF.

https://www.novaresource.org/codes.htm

67JimmyMO · 07-04-2021, 09:44 AM

Quote:

Originally Posted by geezer#99

This list shows 76 or 77 250 has suffix code CCF.

https://www.novaresource.org/codes.htm

Thanks for that geezer, I remember seeing that website in the past but couldn't find it when I was looking last week.

Everything I can see internally looks good so far, hoping I don't have to bore the cylinders and turn the crank but should know fairly soon.

factorystock · 07-04-2021, 11:02 AM

Quote:

Originally Posted by geezer#99

This list shows 76 or 77 250 has suffix code CCF.

https://www.novaresource.org/codes.htm

Integral exhaust manifold with cylinder head years.

**straight6chevyguy** · 07-04-2021, 11:48 AM

The oil dipstick is in the way!

**straight6chevyguy** · 07-04-2021, 11:49 AM

What type of head came with it?

**straight6chevyguy** · 07-04-2021, 11:50 AM

By the way, nice truck!

67JimmyMO · 07-05-2021, 05:19 PM

Here is a pic of the rest of the engine parts, as you can see the manifold is not integral with the head.

Hiding behind the dipstick is the letter "H".

Does that code F0825CCF still seem like it goes with a 76-77?

Thanks for all the input/comments so far!

geezer#99 · 07-05-2021, 07:50 PM

Some more info for you.

http://67-72chevytrucks.com/vboard/s...d.php?t=356268

67JimmyMO · 07-06-2021, 07:22 AM

Quote:

Originally Posted by geezer#99

Some more info for you.

http://67-72chevytrucks.com/vboard/s...d.php?t=356268

There are a bunch of good info links to explore there, I'm on it!

Thanks again geezer.

67JimmyMO · 10-07-2021, 06:56 PM

Making progress on the 250 6 cyl. build, it went 30 over on the pistons and 10 under on the rods and mains.

Crank, rods and pistons are installed. Heat fit the cam and crank timing gears today and installed the camshaft.

I pulled the pickup tube on the oil pump to put in the new one and wondered if there is supposed to be an rubber o-ring at the pump-to-pickup arm joint?

Would like to replace my dipstick tube also and wondered if anyone had a good source for them? Seems like I have gotten some in the past for small block Chev V8s and some of them didn't fit very well and would never tighten up.

07-03-2021, 04:53 PM	#1
67JimmyMO Registered User Join Date: Jun 2014 Location: Southwest MO Posts: 115	I6 Identification? I have been working on "restoring" a 65 K10 for use as a farm vehicle here in SW Missouri for about a year. To date I have rebuilt the front axle (kingpins/bearings/seals), new brakes all around and rebuilt all 3 driveshafts. Also installed a mini-spool in the rear diff as this truck will never see pavement. When I got the truck the 230 that was in it was locked up tight but I planned on beating it apart and and doing a full rebuild. That plan changed when I took the head off and discovered the #5 piston was gone and there's a hole in that cylinder big enough to throw a small cat through! I just recently acquired a 250 6 popper and was hoping the group here could help me identify the year of this motor. I think it may be somewhat newer as it has an OEM HEI unit in it, but I suppose that could have been added. The code stamped near the HEI is: F0825CCF I can provide some casting numbers too if needed, thanks. Attached Images __________________ 1967 GMC SWB 383 Stroker w/Saginaw 4sp 1979 Chev C30 Scottsdale Flatbed 350 4sp 2000 Chev 3500 Flatbed 454 Automatic 1978 GMC 6500 Flatbed Dump 366 5sp + 2sp 1965 Chev K10 LWB 230 4sp 1985 Chev K30 Flatbed 350 4sp

07-03-2021, 06:43 PM	#2
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: I6 Identification? Can you provide a picture of the passenger side of the engine? __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

07-03-2021, 10:26 PM	#4
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,734	Re: I6 Identification? This list shows 76 or 77 250 has suffix code CCF. https://www.novaresource.org/codes.htm

07-04-2021, 11:48 AM	#7
straight6chevyguy Senior Member Join Date: Dec 2018 Location: yamhill OR Posts: 910	Re: I6 Identification? The oil dipstick is in the way! __________________ 1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1978 chevy c20 350 4speed 1998 chevy c1500 4.3L 5speed 2002 Chevy s10 4.3L auto 4x4 Plus a Mercury & some Fords... To many projects!

07-04-2021, 11:49 AM	#8
straight6chevyguy Senior Member Join Date: Dec 2018 Location: yamhill OR Posts: 910	Re: I6 Identification? What type of head came with it? __________________ 1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1978 chevy c20 350 4speed 1998 chevy c1500 4.3L 5speed 2002 Chevy s10 4.3L auto 4x4 Plus a Mercury & some Fords... To many projects!

07-04-2021, 11:50 AM	#9
straight6chevyguy Senior Member Join Date: Dec 2018 Location: yamhill OR Posts: 910	Re: I6 Identification? By the way, nice truck! __________________ 1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1978 chevy c20 350 4speed 1998 chevy c1500 4.3L 5speed 2002 Chevy s10 4.3L auto 4x4 Plus a Mercury & some Fords... To many projects!

07-05-2021, 05:19 PM	#10
67JimmyMO Registered User Join Date: Jun 2014 Location: Southwest MO Posts: 115	Re: I6 Identification? Here is a pic of the rest of the engine parts, as you can see the manifold is not integral with the head. Hiding behind the dipstick is the letter "H". Does that code F0825CCF still seem like it goes with a 76-77? Thanks for all the input/comments so far! Attached Images __________________ 1967 GMC SWB 383 Stroker w/Saginaw 4sp 1979 Chev C30 Scottsdale Flatbed 350 4sp 2000 Chev 3500 Flatbed 454 Automatic 1978 GMC 6500 Flatbed Dump 366 5sp + 2sp 1965 Chev K10 LWB 230 4sp 1985 Chev K30 Flatbed 350 4sp

07-05-2021, 07:50 PM	#11
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,734	Re: I6 Identification? Some more info for you. http://67-72chevytrucks.com/vboard/s...d.php?t=356268

10-07-2021, 06:56 PM	#13
67JimmyMO Registered User Join Date: Jun 2014 Location: Southwest MO Posts: 115	Re: I6 Identification? Making progress on the 250 6 cyl. build, it went 30 over on the pistons and 10 under on the rods and mains. Crank, rods and pistons are installed. Heat fit the cam and crank timing gears today and installed the camshaft. I pulled the pickup tube on the oil pump to put in the new one and wondered if there is supposed to be an rubber o-ring at the pump-to-pickup arm joint? Would like to replace my dipstick tube also and wondered if anyone had a good source for them? Seems like I have gotten some in the past for small block Chev V8s and some of them didn't fit very well and would never tighten up. __________________ 1967 GMC SWB 383 Stroker w/Saginaw 4sp 1979 Chev C30 Scottsdale Flatbed 350 4sp 2000 Chev 3500 Flatbed 454 Automatic 1978 GMC 6500 Flatbed Dump 366 5sp + 2sp 1965 Chev K10 LWB 230 4sp 1985 Chev K30 Flatbed 350 4sp



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