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Last Updated: May 12, 2014 added pics of PCV valve.

 

 

 

Click on thumbnail for larger photo below

 

For 1970, a new forged-steel crankshaft was used with drop-forged steel connecting rods. 

Forged-aluminum 11.0:1 pistons made by TRW. Fitted with a dual snorkle Smog cleaner. 

My build date is 05E which decodes as May 5th week.

 

 

Engine Rebuilt pics below

 

 

 

 

 

HP-360 @ 6000 rpm and Torque 380 @ 4500 rpm

 

    

Total timing set @ 36* @ 4000 rpm with vacuum disconnected.    

 

1970 LT1 Cam 3972178 

 

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intake duration of 317 degrees

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exhaust duration of 346 degrees

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overlap of 96 degrees

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Lift - Intake - .4586" (includes lash - .024")

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Exhaust - .4850" (includes lash - .030")

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rocker arm ratio of 1.5 to 1)

 

 

Heads - Casting 3972186 Part No 3987376

 

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cast iron

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2.02 inch diameter intake valves

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1.60 inch diameter exhaust valves

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64cc combustion chamber

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screw-in rocker arm studs with hardened steel pushrod guide plates

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intake valve 2.02 in.

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exhaust valve 1.60 in.

 

 

Induction

 

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cast-aluminum, high-rise, dual plane intake

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780-cfm 4 barrel carb with1.686 inch diameter primary and secondary throttle bores

 

 

 

 

 

 

Water Pump 3953692

 

 

 

 

 

 

Oil Pan / Windage Tray

 

 

 

 

 

Radiator

 

They are not 1970 Z/28 specific so it might help those who are looking to look at other 1970 Camaros besides a Z/28.

A 1970 307 cid-T350  Camaro used the same rad as a 1970 T400 Z28.

Look beyond the Z28 mentality and you might find what you are looking for.

 

4-spd rad pics

 



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Rad Caps

 

Overflow jugs were not used in 1970, but you can add one.

 

Without an overflow jug

 

 

With an overflow jug. Make sure the arrow points to the tube or the water will not drain back into the rad.

 

 

 

Oil/Filter

 

 

 

 

 

 

 

GM EOS 992869

 

  

AC Delco EOS 992869 contains 6221 ppm of ZDDT and 5762 ppm of Phosphorus.

ACDELCO Part No. 992869

 
GM Part No. 992869

 
Category Lubricants / Lubrifiants

 
Product Name Engine Oil Supplement / Supplément d'huile pour moteur

 
Description English ACDelco Engine Oil Supplement is a multi-purpose additive concentrate designed to help eliminate lifter sticking, reduce valve train noise, reduce camshaft lobe scuffing, and reduce break-in wear. The use will maintain the additive levels in oil to promote designed-in oil detergency, disperancy and wear protection, especially under severe service conditions such as high load and high operating temperatures. Not for diesel applications.

 

 

 

 

 

Oil I use with enough ZDDP to protect the flat tappet engine. I do add 1 bottle of GM EOS with the Valvoline oil. 

Joe Gibbs Hot Rod oil does not need EOS. If you add anything it will disturb the chemistry. 

I started to use ZDDPlus to non synthetic oil to be better on the pocket book. 

 

GM stopped selling AC PF25 and PF35 oil filters which did not have the anti drain back valve. 

Napa Gold 1061 is the replacement for the PF35 oil filter and it also does not have the anti drain back valve. 

SB and BB Chevy's already has an anti drain back valve in the oil filter spin on adaptor.

 

 

Break in your cam with Joe Gibbs BR Oil, Viscosity typical of SAE 15W-50

 

 

Prime Tool

 

 

Cam/Lifters

 

Wiped 3 lobes on the solid lifter cam due to lack of ZDDP after about 43,000 miles. It was a slow wear.

Pic on the right, shows the 1st lifter (2E) good compared to the other 3 concaved lifters.

 

 

New Crane Solid Lifters Part # 99250-16

 

 

Felpro 1604 Cork/Rubber with Steel Core Valve Cover Gaskets

 

 

Valve Cover inside numbers

 

 

PCV Valve

 

 

 

 

Fuel Pump Plate

 

 

 

Master Cylinder and Cover

 

Original MC will have 2 bleeders. Due to leaks I replaced mine with a new one from NAPA.

 

 

 

Wire Gutter 8.25" in Length

 

 

 

Valve Stem O Ring Oil Seal

 

Compress spring, Grab keeper locks with magnet, Remove spring, Remove old oil valve seal O ring

Install new O ring on stem, then push in groove with wooden coffee stir stick

 

 

 

Stock Pushrod          

 

 

 

3927186 Heads

 

cc check - 64.25 cc

 

 

 

Using 1.52 Comp Magnum Roller Tip Rockers, part # 1412-16 after my cam swap

 

 

 

What's a CE block?

 

 

 

Underhood insulation was part of the Z87 customer interior option.

 

Available from Chuck Sharin at http://www.nastyz28.com/forum/index.php

 

 

Factory metal hood insulation clips

 

 

 

 

 

Side Cowl Weatherstrip

 

 

 

 

 

Balancer

 

 

Balancer Fully Installed and timing tab

 

If you need to add the 180* mark on your balancer for setting valves then get yourself a seamstress measuring tape

and using masking tape, tape the start end of the measuring tape on the balancer line which is TDC to #1 cyl and

place a mark 12.5" around for your 180* location for a 8" balancer.
 

 

 

Pulleys

 

 

Crank Pulley

part # 3956668 CG

 

 

Water Pump Pulley

part # 3947824BV

 

 

 

Fan Belt

 

 

 

 

               

Accelerator Cable

 

 

           

3972296 Accelerator Cable?

 

 

 

1100 mi LA automatic 70 Z28 showing the accelerator cable

 

 

 

Accelerator cable/spring/bracket

 

 

336969 Accelerator cable at interior and engine side

 

To change the cable at the inside rod end,

Laying on the carpet, squeeze the back of the plastic lock and push it towards you and it'll pop out.

There are slits on the back that compress so it can come out of the hole frontward and locks into place

when you push it back on. The plastic piece has a slit in it so the cable can be slid out and the new one

slid back in.

 

 

 

 

Brake Vacuum Hose

 

 

 

 

 

Rad Support Rubber Mounts and Hoses

 

Used for both upper and lower locations. Same part #, 2 upper and 2 lower per car.

 

                            

Small block part # 371189         Big block part # 6264100

 

 

GM Upper rad hose 3970124 and Lower Rad Hose 360647

 

Heater hose clamp

 

 

           

 

Gas Cap

 

gas cap front.jpg (22441 bytes) gas cap rear.jpg (20798 bytes)                      

 

 

 

 

Oil Dipstick

 

 

 

Washer Jug

 

 

 

Spark Plug Diag

 

 

 

Wiper Motor