Inline Tube - 1969 Pontiac GTO Bobcat Engine Detail
When the engine was tested and the inspector stamped OK on the front of the head, we have seen these inspector stamps in numbers 1-9 and even upside down. The WW block sticker was to identify the engine to the line worker. It was much easier to see the big sticker than the small WW id below the sequence number stamp next to the sticker.
Since this is a 69 Ram Air IV although similar to the standard engine a few items are different. The valve cover breather tube is gray phosphate, the wires are date coded and the factory wire looms give that factory look.
This is a aftermarket oil sending unit but painted to match the original with the correct brass elbow. We used a standard white filter but the oil filter should be painted along with the bolts since it was on the engine assembly. The filter has no marking since they were bought at the factory in bulk but was also on the engine and should have blue over spray on it. The edges of the manifolds and the spark plugs would also have blue paint on them. The manifolds had a phosphate grey type of coating to protect them but would also have blue engine paint on the edges.
The distributor was also part of the engine assembly and should have blue paint over the plated hold down and bolt and the base of the distributor. Many of these parts had light spray that over the years has been covered with grease and oil.
The Ram Air Aluminum intake and water neck was spared the paint. The bolts were nature platingís of silver and black zinc and phosphate. The stud in the front of the water neck was standard on all engines weather they used it for power steering or not for manual. The black square indent plug was on Manual trans cars in place of the vacuum unit. We have the correct tower clamps and tin coated fuel line. The PVC original valves had a olive green plating and standard fuel hose connecting them to the brass intake fitting.
The throttle bracket was gray phosphate on the RA4 and engine color on the RA3 and standard engines. The throttle cable and bracket was put on later and the hold down is silver and the cable is has the tag PB that is noted on the build sheet. Coil bracket is silver zinc and the coil is black. The throttle return spring is blue and if additional tension is needed a yellow smaller dia. Spring is added. The power brake booster vacuum hose is clipped to the tang on the throttle bracket.
The preheat tube that runs from the shroud to the air cleaner is black but has also been seen in silver with black paint over it. The originals were metal and the reproduction is black paper with a metal core and is more durable. The tube is held to the shroud with a pinch style clip. The shroud is gray phosphate and the folded metal style is RA4 and the molded shield is RA3. We have seen this shroud in black, silver and grey phosphate. It is held in place by the head stud with slotted silver nuts. The end holes of the exhaust manifold are also larger for expansion and are the only ones that use the lock tabs.
The negative battery cable runs to the stud of the head and the special star washer is applied first then the battery cable and finally the nut. Again we see the slotted nut that holds the preheat shroud to the engine head stud.
The engine alternator has the stamp XC that is for the standard 37 amp unit and has the black plastic cap that protects the power end stud from coming in contact with metal. The cap is also commonly seen in red. The bolt that holds the Alt at the engine bracket is a built in washer bolt that we have another washer behind so we do not scratch all the paint when it is tightened down.
The harmonic balancer was on the engine at the time of paint so the balance bolt would have blue paint on it and the black pulley bolted on after paint. Notice the pulley bolts are black. The AC delco fuel pump is held on with the correct TR bolts and special aluminum washers. The fuel hose has the green fuel clamp and the red fuel return clamp with the correct fuel hose markings on the hose. The belt is a smooth non cogged belt. The fuel metal line is tin coated and preformed. The water pump bolts should have the indented star bolts painted over blue. All brackets were put on after engine paint so the bolts would be silver or black zinc.
The dip stick tube would be blue and the dip stick was natural since it was put in after engine paint. The manifolds had a gray phosphate coating but would have engine blue overspray on the head edge that would of most likely burned off after a few hours of running the engine.
This is a solid motor mount on the left side only the original would be metal and rubber. The tube above it is for the battery cable to run and keep it off the hot manifold. The motor mount bolts to the block have the special indented heads and inspection marks to let the inspector know they are tight. The starter brace runs from the engine block motor mount to the front o f the starter. This brace help to hold the starter in place. The starter body is black and the end cap is bare metal.
The starter body is black and the rest bare metal. The starter solenoid has a heat shield if you got RA exhaust manifolds to keep the heat from this part. The starter also has silver starter bolts and one galvanized starter shim.
This shows the correct manifold color and the manifold bolts with the circular head markings. The end bolts holes in the manifolds are for expansion and use the locks that have not been bent over yet. You can just barely see the RA IV inner heat shield. There is an inner shield to contain the heat around the manifold and keep it away from the wiring harness.
The RA IV has a separate heat crossover for the choke and a second heat riser tube. The front and the rear of the intake manifold use the standard bolts and the center bolts have no built in washer but have a separate thick washer to hold it all in place. All RA IV had the wiring gutter bracket because on the RA 4 it has an extra hole on the left side to hold the heat riser collar. The choke is held in place with a Philips screw with a lock washer. Chrome valve cover cars use silver zinc bolts with built in washers. The carb has been sent out to be re-plated and a new white strip vacuum hose installed. The carb bolts are black phosphate.
The RA IV used a heat shield on the under intake crossover to keep heat from the intake gas. It used small hex head screws to hold the shield halves together. The shield is silver zinc and had the thick washers to hold the crossover to the engine block. The silver zinc intake fitting is for the air cleaner vacuum.
The air cleaner base is gloss black with the RA foam seal. The vacuum switch is light green and the vacuum hose that runs from the switch through the air cleaner base is black with a white stripe. This hose has the white union that connect it to the under hood pan vacuum actuators. Also notice the green date code on the air cleaner base. Every original Pontiac air cleaner has this factory date code stamp.
Inline tube supplied all the engine tubes, brackets, fittings, bolt kits, ink stamps, wire looms and marking pencils. These are the detail items that make a good engine complete.
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