is it worth it? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tim21391 · 09-20-2010, 08:54 PM

i have a 402 in my truck.. rebuilt probably 5-7 years ago.. it runs fine now.. but i have had to replace gaskets here and there.. so my question is.. would it be worth it if i pulled it. check the cylinder wear if its still good and pistons are still good give them a good parts wash bath. install bearings and new cam and lifters and gaskets and everything? my idea.. im sure its got carbon build up and get one of the summits rebuild kits for like 400 bucks and hopefully give it a few miles per gallon this way? or shall i just leave it and wait til a major problem occurs.. take about half tank to drive 60 miles

**fine69** · 09-20-2010, 08:58 PM

Quote:

Originally Posted by tim21391

i have a 402 in my truck.. rebuilt probably 5-7 years ago.. it runs fine now.. but i have had to replace gaskets here and there.. so my question is.. would it be worth it if i pulled it. check the cylinder wear if its still good and pistons are still good give them a good parts wash bath. install bearings and new cam and lifters and gaskets and everything? my idea.. im sure its got carbon build up and get one of the summits rebuild kits for like 400 bucks and hopefully give it a few miles per gallon this way? or shall i just leave it and wait til a major problem occurs.. take about half tank to drive 60 miles

Use the old adage, DON'T FIX IT IF IT AIN'T BROKE.
If it runs fine why mess with it?

tim21391 · 09-20-2010, 09:00 PM

just seein if by cleaning the stuff would get me better mpg.. i want a different cam tho. i want a bigger one to give me the more loping sound

Jacfourteen · 09-20-2010, 09:06 PM

doing some tuning would probably give you more of a boost in MPG than doing a rebuild. What carb are you running and how is it jetted? What ignition are you running? These both can be tuned to optimize mileage.

Jacfourteen · 09-20-2010, 09:08 PM

Also forgot to ask what tranny and rear are you running? OD and/or taller gears could help out too.

71swb4x4 · 09-20-2010, 09:11 PM

The $400 you spend would take a long time to make up in whatever fuel economy you did find. Not to mention that it will cost you WAY more than $400. We all konw what happens when you pull an engine to do a quick "refresher". One thing leads to another and pretty soon you are spending $2,000 trying to save $500 in gas.

GASoline71 · 09-20-2010, 09:38 PM

If you want a "lopey" cam... you can forget good MPG...

Gary

09-20-2010, 08:54 PM	#1
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	is it worth it? i have a 402 in my truck.. rebuilt probably 5-7 years ago.. it runs fine now.. but i have had to replace gaskets here and there.. so my question is.. would it be worth it if i pulled it. check the cylinder wear if its still good and pistons are still good give them a good parts wash bath. install bearings and new cam and lifters and gaskets and everything? my idea.. im sure its got carbon build up and get one of the summits rebuild kits for like 400 bucks and hopefully give it a few miles per gallon this way? or shall i just leave it and wait til a major problem occurs.. take about half tank to drive 60 miles __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796

09-20-2010, 09:00 PM	#3
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	Re: is it worth it? just seein if by cleaning the stuff would get me better mpg.. i want a different cam tho. i want a bigger one to give me the more loping sound __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796

09-20-2010, 09:06 PM	#4
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: is it worth it? doing some tuning would probably give you more of a boost in MPG than doing a rebuild. What carb are you running and how is it jetted? What ignition are you running? These both can be tuned to optimize mileage. __________________ 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

09-20-2010, 09:08 PM	#5
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: is it worth it? Also forgot to ask what tranny and rear are you running? OD and/or taller gears could help out too. __________________ 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

09-20-2010, 09:11 PM	#6
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: is it worth it? The $400 you spend would take a long time to make up in whatever fuel economy you did find. Not to mention that it will cost you WAY more than $400. We all konw what happens when you pull an engine to do a quick "refresher". One thing leads to another and pretty soon you are spending $2,000 trying to save $500 in gas. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

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