305 rebuild questions
Thread Starter
Member
Joined: Jun 2003
Posts: 319
Likes: 0
From: Lansdale Pa
Car: 90 RS
Engine: 305 TBI - LT1 Cam
Transmission: T56
Axle/Gears: Stock Crap
305 rebuild questions
So I've yanked out the engine and tore it down and it looks like I need a new timing set. Am I correct that my 305 has a roller cam?
My main goal was to just replace all the gaskets and get it back on the road. Is there anything else I should really do while I have the engine out? I really don't want to put to much money into this engine, I'd rather save it for a 350.
thanks all!
My main goal was to just replace all the gaskets and get it back on the road. Is there anything else I should really do while I have the engine out? I really don't want to put to much money into this engine, I'd rather save it for a 350.
thanks all!
Supreme Member

Joined: Nov 2008
Posts: 1,545
Likes: 10
From: South Carolina
Car: 85 2M6, 87 'Bird 88 'burb
Engine: LX9, LG4, L05
Transmission: F23, 700r4, 700R4
Axle/Gears: 3.63, 2.73, 4.10
Re: 305 rebuild questions
if you're going to put a 350 in, now is the time to do it if you have the motor out. check with some of your local machine shops, they might have a rebuilt 350 waiting for a home, it'd prob be cheaper than rebuilding the 305.
Thread Starter
Member
Joined: Jun 2003
Posts: 319
Likes: 0
From: Lansdale Pa
Car: 90 RS
Engine: 305 TBI - LT1 Cam
Transmission: T56
Axle/Gears: Stock Crap
Re: 305 rebuild questions
I would love to just get rid of the 305 right now, but I really don't have the money for the 350 and all that it entails.
Right now I am looking at a new gasket kit and a new timing chain set as the only parts I need to "rebuild" the 305. Unless people have some other inexpensive things to do to the engine while I have it out, which is the main reason for this thread.
I really just want to get it back on the road in good running condition.
Right now I am looking at a new gasket kit and a new timing chain set as the only parts I need to "rebuild" the 305. Unless people have some other inexpensive things to do to the engine while I have it out, which is the main reason for this thread.
I really just want to get it back on the road in good running condition.
Supreme Member

Joined: Nov 2008
Posts: 1,545
Likes: 10
From: South Carolina
Car: 85 2M6, 87 'Bird 88 'burb
Engine: LX9, LG4, L05
Transmission: F23, 700r4, 700R4
Axle/Gears: 3.63, 2.73, 4.10
Re: 305 rebuild questions
you should have a factory roller cam, but why do you have your engine out in the first place?
Thread Starter
Member
Joined: Jun 2003
Posts: 319
Likes: 0
From: Lansdale Pa
Car: 90 RS
Engine: 305 TBI - LT1 Cam
Transmission: T56
Axle/Gears: Stock Crap
Re: 305 rebuild questions
I decided to yank the engine for a couple of reasons:
1. I took it in to the shop because it was stalling out and wouldn't restart when it got to operating tempature, my mechaninc suspected a blown head gasket.
2. It had been loosing power over the last couple of years and has 135k miles.
3. It definetly needs new gaskets in a couple of places because it is covered in gunk.
4. I wanted to remove the AIR system, install headers, and remove the AC.
5. I wanted to get my hands dirty.
1. I took it in to the shop because it was stalling out and wouldn't restart when it got to operating tempature, my mechaninc suspected a blown head gasket.
2. It had been loosing power over the last couple of years and has 135k miles.
3. It definetly needs new gaskets in a couple of places because it is covered in gunk.
4. I wanted to remove the AIR system, install headers, and remove the AC.
5. I wanted to get my hands dirty.
Thread Starter
Member
Joined: Jun 2003
Posts: 319
Likes: 0
From: Lansdale Pa
Car: 90 RS
Engine: 305 TBI - LT1 Cam
Transmission: T56
Axle/Gears: Stock Crap
Re: 305 rebuild questions
Trending Topics
Thread Starter
Member
Joined: Jun 2003
Posts: 319
Likes: 0
From: Lansdale Pa
Car: 90 RS
Engine: 305 TBI - LT1 Cam
Transmission: T56
Axle/Gears: Stock Crap
Re: 305 rebuild questions
So I guess I'll keep this thread going since my next question is along the same lines.
How do I go about cleaning up the block and heads to get them ready for reassmebly/new parts and paint?
How do I go about cleaning up the block and heads to get them ready for reassmebly/new parts and paint?
Supreme Member

Joined: Nov 2008
Posts: 1,545
Likes: 10
From: South Carolina
Car: 85 2M6, 87 'Bird 88 'burb
Engine: LX9, LG4, L05
Transmission: F23, 700r4, 700R4
Axle/Gears: 3.63, 2.73, 4.10
Re: 305 rebuild questions
how far have you taken the motor down? bare block? are you installing new bearings and rings?
Thread Starter
Member
Joined: Jun 2003
Posts: 319
Likes: 0
From: Lansdale Pa
Car: 90 RS
Engine: 305 TBI - LT1 Cam
Transmission: T56
Axle/Gears: Stock Crap
Re: 305 rebuild questions
I've taken it down to a short block, I don't really want to mess with the bottom end.
Supreme Member

Joined: Nov 2008
Posts: 1,545
Likes: 10
From: South Carolina
Car: 85 2M6, 87 'Bird 88 'burb
Engine: LX9, LG4, L05
Transmission: F23, 700r4, 700R4
Axle/Gears: 3.63, 2.73, 4.10
Re: 305 rebuild questions
try a wire brush and some degreaser, that should clean it up fine.
you might consider a cam swap since you have it torn down, you can prob get an LT1 cam fairly easy, cheap and improve perfomance.
you might consider a cam swap since you have it torn down, you can prob get an LT1 cam fairly easy, cheap and improve perfomance.
Thread
Thread Starter
Forum
Replies
Last Post
84z96L31vortec
Tech / General Engine
7
Aug 20, 2017 12:16 AM
84z96L31vortec
North East Region
1
Aug 10, 2015 08:27 PM






