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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 4x4Cowgirl on January 02, 2010, 10:01:58 pm

Title: Lifters
Post by: 4x4Cowgirl on January 02, 2010, 10:01:58 pm

Does anyone know what the lifter outside diameter is on some stock 350 lifters? I'm looking at replacing my lifters. Are there any other specs I need to know when ordering new ones?

Title: Re: Lifters
Post by: malibu795 on January 02, 2010, 10:10:37 pm

.845 iirc

SBC lifter are all the same diamete through out the years... from introduction to with the LSx motors came out

Title: Re: Lifters
Post by: 4x4Cowgirl on January 02, 2010, 10:12:01 pm

O ok well I was lookin on Summit and they had 4 different choices for diameter so I had no clue which one it was.
THANKS A LOT FOR YOUR HELP  ;D

Title: Re: Lifters
Post by: malibu795 on January 02, 2010, 10:17:37 pm

http://www.summitracing.com/parts/SUM-HT817/

there you go young lady

Title: Re: Lifters
Post by: 4x4Cowgirl on January 02, 2010, 10:18:46 pm

would these work?

http://www.summitracing.com/parts/NAL-5234890/

 ??? ???

Title: Re: Lifters
Post by: malibu795 on January 02, 2010, 10:24:08 pm

yes they can... those are hydrualic roller lifters... they are made to go with billet steel camshafts... you have a hydrualic flat tappet camshaft. and a cast steel camshaft

they arent ideal for what you are after unless your motor is already a hydraulic roller camshaft motor...  in which they lifters are re-usable were as a flat tappet they are matted to the camshaft after breakin is done

pushrod length are different between the two as well

Title: Re: Lifters
Post by: 4x4Cowgirl on January 02, 2010, 10:25:54 pm

Alrighty then.... I guess it all depends on what I find out about this motor when I tear it apart. But supposedly its just supposed to be a stock 350. So I just need flat tappet lifters?

Title: Re: Lifters
Post by: malibu795 on January 02, 2010, 10:40:15 pm

do you know what year the block is? it would give you a good idea weather the block is a 2-peice rear main (normally flat tappet) or 1 piece(roller tappet)

and yes

Title: Re: Lifters
Post by: 4x4Cowgirl on January 02, 2010, 10:45:23 pm

We are thinkin that my block is an early 80's... and we think its a 2 piece but shoot who knows. LOL. I'm gettin the engine stand tomorrow so hopefully I can have this motor out and torn apart soon. Too many questions to figure out without actually lookin at it and knowing for sure. LOL.

Title: Re: Lifters
Post by: malibu795 on January 02, 2010, 10:49:16 pm

there are block number casted into the back left side of the block.. right next to the tramsion mounting flange/end of block..

take that number can cross reffrence it here http://www.chevymania.com/ it will give you and idea of what you got.

Title: Re: Lifters
Post by: 4x4Cowgirl on January 02, 2010, 10:52:29 pm

Okie doke. I appreciate all your help  ;D

Title: Re: Lifters
Post by: malibu795 on January 02, 2010, 10:56:01 pm

darn no thumbs up emocon :(

Title: Re: Lifters
Post by: 4x4Cowgirl on January 02, 2010, 11:02:58 pm

LOL we need some more options on those smilies!  :D :D

Title: Re: Lifters
Post by: eventhorizon66 on January 03, 2010, 11:57:57 am

I have to ask, why are you only replacing the lifters?  Like malibu795 mentioned, with flat tappet cams each lifter is mated to one cam lobe.  You need to replace the cam and lifters as a set.  If it is a stock 350 you will have flat tappet lifters and those are the only type you can use.  When you fire the motor for the first time with a fresh cam and lifter set, you will need to break in the cam (2000 rpm for 20 min is the rule of thumb) to mate the lifters and cam lobes.

Title: Re: Lifters
Post by: malibu795 on January 03, 2010, 02:17:32 pm

seams she got a camshaft with no lifters

Title: Re: Lifters
Post by: eventhorizon66 on January 03, 2010, 02:41:40 pm

Oh, gotcha.

Title: Re: Lifters
Post by: 4x4Cowgirl on January 03, 2010, 11:49:58 pm

Yeah, I just got the camshaft is all... That's why I'm lookin for lifters