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05-20-2017, 03:45 AM
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#1 |
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Registered User
Join Date: May 2017
Location: Harbor City,California
Posts: 8
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235 or 250
how can i tell what size straight 6 i have.. grandpa replaced the engine on his car 15 years ago and doesn't remember if he replaced with the same engine or not...
 thank you in advance,,,,this forum is great !!!
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05-20-2017, 06:00 AM
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#2 |
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Six in a row makes it go...
 
Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: 235 or 250
I'm guessing that you mean 230, not 235.
The 235 was used from 1950-1962. Then it was replaced with the 194/230/250/292 family. Here's some casting numbers. Might be other websites with better info: http://www.castingnumbers.info/site/...cks/t/Inline-6
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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05-20-2017, 08:05 AM
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#3 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: 235 or 250
Those two engines are very different. Easy way to discern them is the 235 has 2 large freeze plugs on the driver side, the 230/250 blocks have 3.
Quick way to tell a 230 from 250 is remove a spark plug and look at the pistons. 230 has flat tops with four valve reliefs, the 250 has dished pistons.
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1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
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05-20-2017, 10:33 AM
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#4 |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,280
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Re: 235 or 250
The 235's had two studs with acorn nuts holding the valve cover on. The 230/250 engines had bolts on the perimeter of the valve cover holding it on.
Correct? GRX |
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05-21-2017, 01:27 PM
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#5 | |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Quote:
__________________
1969 c-10 Step Side Long Bed. I-6 250cid = = 1969 Pontiac GTO hard top. 400, 4-speed.
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05-21-2017, 06:21 PM
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#6 |
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Registered User
Join Date: May 2017
Location: Harbor City,California
Posts: 8
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Re: 235 or 250
this block has 3 freeze plugs
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05-21-2017, 06:56 PM
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#7 |
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Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: 235 or 250
The 235 also has a single lifter cover. The 194/230/250/292 engines have two side by side covers. I believe the 292 has slightly larger covers.
216/235's have only 4 exhaust ports. The 250 has 6 exhaust ports.
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05-22-2017, 02:20 AM
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#8 | |
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Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,045
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Re: 235 or 250
Quote:
It will be easier than pulling the head and mic-ing the bore. 68Stepbed: The 292 L6 has much larger side panel lifter covers -- 6'' tall. The 230/250 covers are just under 4'' iirc.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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05-23-2017, 03:56 AM
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#9 |
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Registered User
Join Date: May 2017
Location: Harbor City,California
Posts: 8
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Re: 235 or 250
thank you .. i will check it out ,,and report back
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