Inline 6 Cylinder Q's... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Canadian694x4** · 05-22-2004, 11:21 PM

I was looking at a few local junker's that had inline 250's. A few question's came to mind...

Anyone have an Inline 250 that know's what kinda Gas mileage they get outta it? Is it much better than a stock 350/307/283 V8 of our era?

Are parts to rebuild these a pain in the A$$ to find/replace?
I ask because the ones I've seen have all been pretty much striped down to the block almost in some cases...

Thanks

Brian

Longhorn Man · 05-23-2004, 12:07 AM

From what I have read on here and been told from one owner I knew in tx (He had a 67 LWB w/250/car 3 speed) the MPG isn't much better than the norm on small blocks.
While there are some getting quite a bit more, most seem to get 10 - 15 on the open road with small blocks.

ronh72c10 · 05-23-2004, 12:15 AM

Parts for a standard rebuild are easy enough to find, I picked up a rebuild kit for the 250 in my wife's truck. It was only $122Us (plus the usual UPS cross border gouging fee) for a re-ring, bearing, gasket and oil pump set. Actually I put the short block back together in the last two days.

As far as milage goes, never drove it long enough to find out. And don't remember what my 72 Chevelle got.

Ron

**Canadian694x4** · 05-23-2004, 01:12 AM

Thanks for the Info Guys!

pritch · 05-23-2004, 01:57 AM

My panel has a 250 w/three on the tree. I got just under 20 mpg over the three tank of gas I've ran through it. I mentioned before the trouble I had with my tow vehicle when I was coming home from '68 Suburban's in Phoenix. Long story short, I had to drive the panel the last 250 miles home, plus to work the next four days (60 miles each way) while our crack (head) mechanics changed the fuel pump on the F*rd.

One question I have on that 250-someone put a chrome valve cover on mine (and it leaks oil like most do-I've changed the gasket and it still leaks, just not as much) Anyway-this valve cover has 3 holes. One on top in the rear that the pvc is hooked to, one on top in the front that has a breather cap and one on the drivers side front that just has one of those expanding plugs in it. This plug leaks, and that breather leaks too, although it is mostly blow-by I think. Do stock v/c's have this third hole in the side? And if so, what's it there for? And why do I need a breather and a pvc? If I put a cap where the breather is, it blows off. OK, maybe that's four or five questions.

PanelDeland · 05-23-2004, 10:13 AM

A 250 won't do much better than the 307/350. They are still moving the same weight,they have the same gear ratio and they are of a lower compression ratio.You could probably get alittle more out of it if you wanted to run 3.08 gears with the stock 3 or 4 speed manual,but you would have lousy acceleration and might use enough more gas starting off to offset any gains unless it was all hiway driving with few starts.It would also be harder on the clutch when you took off.
I get about 15-18 mpg out of my 250 but I don't run it too hard since it's a stock 6 it probably won't turn 12 sec 1/4's anyway.

Longhorn Man · 05-23-2004, 12:16 PM

Pritch,
When you have a PVC, you need sopme sort of fresh air intake, a breather or a tube going into your air filter.
I would guess you valve cover is supposed to have one PVC valve, one oil fill cap, and one breather.

bluec10 · 05-26-2004, 01:32 PM

Almost all the parts that you need for your L6 can be found at Canadian Tire. As far as rebuild kits...get in touch with Piston Ring/Autovalue. Just thought I'd add a Canadian perspective.

oldsub86 · 05-26-2004, 03:06 PM

If you plan to go inline, get the 292. I think it is a better motor and the mileage won't be much different. It has more torque.

beaterC10 · 05-26-2004, 03:27 PM

Yea, I second the vote for finding a 292. The 250's I have owned were uninspiring in performance and mileage. The 292 didn't get any better mileage but man, what a torque monster that thing was.

notmycity · 05-27-2004, 09:34 AM

Quote:

Originally Posted by beaterC10

Yea, I second the vote for finding a 292. The 250's I have owned were uninspiring in performance and mileage. The 292 didn't get any better mileage but man, what a torque monster that thing was.

The 292 is most certainly a torque monster! Also, even though mine needs some top-end TLC, I'm averaging over 20mpg with the 3 speed trans, and though I'm "new" to the classic chevy truck arena, I have owned several old chevys with 250's in them and I found they too averaged over 20 mpg if you drive them right. My one Chevelle came with a 250 and my milage was cut in half when I threw a sb v8 in it........went from about 20-25mpg to about 10-12mpg. I expect even better mpg after I tweak this ol' farm hand

I was seriously considering molesting my recently purchased "farmer's special" to a v8, but after a few recent rapes at the gas pump I'm going to do what I can to keep her a 292. Definitely try to find a 292 for economy and lots of balls for a six! Good luck.......

724wdcopper · 05-27-2004, 10:00 AM

look up cliffordperformance.com for dress and hard parts, manifolds, headers, superchargers . . . you name it! also, inliners international has some good info on putting a little more juice to those great engines. thought of building one for my street rod 1929 chev coupe ( a 250 ) until i took the block and head to the machine shop and they told me they were completely worn out! guess that's what you get with a free engine! still have some parts if you're interested - HEI distributor, factory finned aluminum valve cover (marine), AC bracket, etc. heath_harmon@hotmail.com.

**'68OrangeSunshine** · 05-28-2004, 03:30 AM

Try:
www.inliners.org

292's ROCK!

**guyryan100** · 05-28-2004, 08:30 AM

I have a running 250 here in the garage still bolted to a 3-speed tranny. Come pick it up if you want it! (Might be a bit of a drive to Atlanta).

05-22-2004, 11:21 PM	#1
Canadian694x4 Born To Lose Club Join Date: Feb 2003 Location: Calgary, Alberta/Oxenden, Ontario, Great White North Posts: 13,307	Inline 6 Cylinder Q's... I was looking at a few local junker's that had inline 250's. A few question's came to mind... Anyone have an Inline 250 that know's what kinda Gas mileage they get outta it? Is it much better than a stock 350/307/283 V8 of our era? Are parts to rebuild these a pain in the A$$ to find/replace? I ask because the ones I've seen have all been pretty much striped down to the block almost in some cases... Thanks Brian __________________ Brian Smith - "Born To Lose" 1969 Chevrolet K10 LWB Fleetside - Proud Owner For 22 Yrs - 1 of 208 Built & Sold In Canada!- 283 V8/350TH/NP208, 2" All Spring Lift, 32" Good Year MT/R's. 1972 GMC K2500 Custom LWB Fleetside - Proud Owner For 3 Yrs - 1 of 571 Built & Sold In Canada! - 350 V8/SM465/NP205, 4” Rough Country Lift, 33” Interco TSL Thornbirds 2007.5 GMC Sierra SLE 2500HD 4x4 - Proud Owner For 17 Yrs- 6.6L V8 Duramax Diesel/Allison 1000, 2" Lift, 33" Mickey Thompson MTZ's. 2008 Yamaha Raptor 700r - Proud Owner For 15 Yrs - ITP Mud Lites. 2015 John Deere 1025R - Proud Owner For 8 Yrs - 24HP Diesel/H120/54D/260B/SB1154.

05-23-2004, 12:15 AM	#3
ronh72c10 Senior Member Join Date: Jul 2003 Location: Mount Forest, Ontario, Canada Posts: 978	Parts for a standard rebuild are easy enough to find, I picked up a rebuild kit for the 250 in my wife's truck. It was only $122Us (plus the usual UPS cross border gouging fee) for a re-ring, bearing, gasket and oil pump set. Actually I put the short block back together in the last two days. As far as milage goes, never drove it long enough to find out. And don't remember what my 72 Chevelle got. Ron __________________ 72 Chevy C10 (rust repaired, starting body work) 72 GMC 3/4ton 4x4 72 Chevy C20 Suburban 38 Ford Tudor Humpback Sedan (from the darkside) 67 Pontiac Parisienne 55 Studebaker Commander 2dr Hardtop (Starliner) My Youtube channel with Video Updates!

05-23-2004, 01:12 AM	#4
Canadian694x4 Born To Lose Club Join Date: Feb 2003 Location: Calgary, Alberta/Oxenden, Ontario, Great White North Posts: 13,307	Thanks for the Info Guys! __________________ Brian Smith - "Born To Lose" 1969 Chevrolet K10 LWB Fleetside - Proud Owner For 22 Yrs - 1 of 208 Built & Sold In Canada!- 283 V8/350TH/NP208, 2" All Spring Lift, 32" Good Year MT/R's. 1972 GMC K2500 Custom LWB Fleetside - Proud Owner For 3 Yrs - 1 of 571 Built & Sold In Canada! - 350 V8/SM465/NP205, 4” Rough Country Lift, 33” Interco TSL Thornbirds 2007.5 GMC Sierra SLE 2500HD 4x4 - Proud Owner For 17 Yrs- 6.6L V8 Duramax Diesel/Allison 1000, 2" Lift, 33" Mickey Thompson MTZ's. 2008 Yamaha Raptor 700r - Proud Owner For 15 Yrs - ITP Mud Lites. 2015 John Deere 1025R - Proud Owner For 8 Yrs - 24HP Diesel/H120/54D/260B/SB1154.

05-23-2004, 10:13 AM	#6
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	A 250 won't do much better than the 307/350. They are still moving the same weight,they have the same gear ratio and they are of a lower compression ratio.You could probably get alittle more out of it if you wanted to run 3.08 gears with the stock 3 or 4 speed manual,but you would have lousy acceleration and might use enough more gas starting off to offset any gains unless it was all hiway driving with few starts.It would also be harder on the clutch when you took off. I get about 15-18 mpg out of my 250 but I don't run it too hard since it's a stock 6 it probably won't turn 12 sec 1/4's anyway. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

05-26-2004, 01:32 PM	#8
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Almost all the parts that you need for your L6 can be found at Canadian Tire. As far as rebuild kits...get in touch with Piston Ring/Autovalue. Just thought I'd add a Canadian perspective. __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

05-23-2004, 12:07 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	From what I have read on here and been told from one owner I knew in tx (He had a 67 LWB w/250/car 3 speed) the MPG isn't much better than the norm on small blocks. While there are some getting quite a bit more, most seem to get 10 - 15 on the open road with small blocks.

05-23-2004, 01:57 AM	#5
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	My panel has a 250 w/three on the tree. I got just under 20 mpg over the three tank of gas I've ran through it. I mentioned before the trouble I had with my tow vehicle when I was coming home from '68 Suburban's in Phoenix. Long story short, I had to drive the panel the last 250 miles home, plus to work the next four days (60 miles each way) while our crack (head) mechanics changed the fuel pump on the F*rd. One question I have on that 250-someone put a chrome valve cover on mine (and it leaks oil like most do-I've changed the gasket and it still leaks, just not as much) Anyway-this valve cover has 3 holes. One on top in the rear that the pvc is hooked to, one on top in the front that has a breather cap and one on the drivers side front that just has one of those expanding plugs in it. This plug leaks, and that breather leaks too, although it is mostly blow-by I think. Do stock v/c's have this third hole in the side? And if so, what's it there for? And why do I need a breather and a pvc? If I put a cap where the breather is, it blows off. OK, maybe that's four or five questions.

05-23-2004, 12:16 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Pritch, When you have a PVC, you need sopme sort of fresh air intake, a breather or a tube going into your air filter. I would guess you valve cover is supposed to have one PVC valve, one oil fill cap, and one breather.

05-26-2004, 03:06 PM	#9
oldsub86 Registered User Join Date: Dec 2002 Location: Canada Posts: 695	If you plan to go inline, get the 292. I think it is a better motor and the mileage won't be much different. It has more torque. __________________ 1968 Chevy - 292 with a powerglide

05-26-2004, 03:27 PM	#10
beaterC10 Senior Member Join Date: Jul 2003 Location: Indianapolis, IN Posts: 1,277	Yea, I second the vote for finding a 292. The 250's I have owned were uninspiring in performance and mileage. The 292 didn't get any better mileage but man, what a torque monster that thing was.

05-27-2004, 10:00 AM	#12
724wdcopper graphic designer Join Date: May 2004 Location: Spokane, Washington Posts: 841	look up cliffordperformance.com for dress and hard parts, manifolds, headers, superchargers . . . you name it! also, inliners international has some good info on putting a little more juice to those great engines. thought of building one for my street rod 1929 chev coupe ( a 250 ) until i took the block and head to the machine shop and they told me they were completely worn out! guess that's what you get with a free engine! still have some parts if you're interested - HEI distributor, factory finned aluminum valve cover (marine), AC bracket, etc. heath_harmon@hotmail.com.

05-28-2004, 03:30 AM	#13
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,567	Try: www.inliners.org 292's ROCK! __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

05-28-2004, 08:30 AM	#14
guyryan100 Registered User Join Date: Sep 2001 Location: Cumming, GA Posts: 485	I have a running 250 here in the garage still bolted to a 3-speed tranny. Come pick it up if you want it! (Might be a bit of a drive to Atlanta).



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