Engine[six] ???????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bestchevyfan · 01-28-2010, 01:22 PM

On a six how can you tell the size [c.i.] thanks,buddy

**john** · 01-28-2010, 02:29 PM

By looking at them the 292 has taller side covers than a 250 and different r.h. motor mount placement.

Jacfourteen · 01-28-2010, 05:06 PM

what kind of six? there were also 305 V6 and 351 V6, but these were much less common.

68lwb292 · 01-28-2010, 05:14 PM

got a pic of it? Like John said if its a 250 the motor mounts will be in the middle on both sides. If its a 292 the Passenger side motor mount is moved forward in front of the fuel pump, staggered from the drivers side. On the 250 the fuel pump and motor mount is opposite of the 292.

Here's a 292.

Here's a 250

pritch · 01-29-2010, 10:53 PM

Or, you could do what I did and tear it all down to find a broken piston, go buy a new piston, then discover that some PO had slipped in a 230 in place of the 250

(Different pistons, of course)

But it got worse. After getting the correct piston, I decided to do the bearings while it was apart. Since there were no oversize markings on the old bearings, I assumed they were standard and bought same. Got it all put back together and back in my Panel. The dang thing started up on the first crank and life was good-but-5 pounds of oil pressure! Sure enough, the crank had been ground 10 under.

On the bright side-I have a whole set of standard size bearings with 5 minutes on them, and a brand new 250 piston

Moral to the story: (and it's been said over and over) Never assume anything!!!

68 C-10 Panel · 01-30-2010, 12:37 PM

Yes, never assume anything...!!!! Ha I posted some questions up here a while ago about a vacuum issue I was having and didn't get one response. So being the persistent bastard I am I trudged on blindly. By the time I tracked down the little -temp vacuum switch- with the 3/8"npt not the 1/2"npt, I with the help of the napa guy came up with some crappy info. Now this is my first 67-72 chevy so its all been a learning experience. Anyways the P.O. switched the darn head on my 250 with a integral head off a 73-79 Nova. Just what I needed another boat anchor. Thats why there was no hook up for the manual choke.But no big deal, a $30 switch sets me off to get a 300 dollar head and I can return it to original. Oh and did we mention ......never assume anything

01-28-2010, 01:22 PM	#1
bestchevyfan Registered User Join Date: Jun 2002 Location: new market, alabama Posts: 1,330	Engine[six] ???????? On a six how can you tell the size [c.i.] thanks,buddy

01-28-2010, 02:29 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Engine[six] ???????? By looking at them the 292 has taller side covers than a 250 and different r.h. motor mount placement. Attached Images __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

01-28-2010, 05:06 PM	#3
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: Engine[six] ???????? what kind of six? there were also 305 V6 and 351 V6, but these were much less common. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's

01-28-2010, 05:14 PM	#4
68lwb292 Ex-Minitrucker Join Date: Apr 2009 Location: Bushnell, FL Posts: 301	Re: Engine[six] ???????? got a pic of it? Like John said if its a 250 the motor mounts will be in the middle on both sides. If its a 292 the Passenger side motor mount is moved forward in front of the fuel pump, staggered from the drivers side. On the 250 the fuel pump and motor mount is opposite of the 292. Here's a 292. Here's a 250 Last edited by 68lwb292; 01-28-2010 at 05:25 PM.

01-29-2010, 10:53 PM	#5
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	Re: Engine[six] ???????? Or, you could do what I did and tear it all down to find a broken piston, go buy a new piston, then discover that some PO had slipped in a 230 in place of the 250 (Different pistons, of course) But it got worse. After getting the correct piston, I decided to do the bearings while it was apart. Since there were no oversize markings on the old bearings, I assumed they were standard and bought same. Got it all put back together and back in my Panel. The dang thing started up on the first crank and life was good-but-5 pounds of oil pressure! Sure enough, the crank had been ground 10 under.On the bright side-I have a whole set of standard size bearings with 5 minutes on them, and a brand new 250 piston Moral to the story: (and it's been said over and over) Never assume anything!!! __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

01-30-2010, 12:37 PM	#6
68 C-10 Panel Registered User Join Date: Apr 2009 Location: MI Posts: 88	Re: Engine[six] ???????? Yes, never assume anything...!!!! Ha I posted some questions up here a while ago about a vacuum issue I was having and didn't get one response. So being the persistent bastard I am I trudged on blindly. By the time I tracked down the little -temp vacuum switch- with the 3/8"npt not the 1/2"npt, I with the help of the napa guy came up with some crappy info. Now this is my first 67-72 chevy so its all been a learning experience. Anyways the P.O. switched the darn head on my 250 with a integral head off a 73-79 Nova. Just what I needed another boat anchor. Thats why there was no hook up for the manual choke.But no big deal, a $30 switch sets me off to get a 300 dollar head and I can return it to original. Oh and did we mention ......never assume anything __________________ 68 C-10 Panel (fixing) 250-6,3ott 93 k1500 pickup DD "When a man is old enough to figure out his dad was right, he has a son who thinks he's wrong" Charles Wadsworth



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