TOKYO: Toyota Gazoo Racing (TGR) will reproduce and reissue parts for the 4A-GE engine of the Corolla Levin and Sprinter Trueno (AE86).
Joining the GR Heritage Parts lineup are a cylinder head sub-assembly and a cylinder block sub-assembly for the two AE86 vehicle models.
TGR said the GR Heritage Parts Project is an initiative to reproduce discontinued service parts and reissue them as new genuine parts "to meet customers' desires to keep on driving their beloved cars full of memories."
Currently, more than 200 parts for eight vehicle models are being reissued and resold under the project.
TGR said the AE86's cylinder head sub-assembly features combustion chambers with additional machining that lessens the untouched cast surface area, reducing differences among individual engines that arise from slight variances in compression ratios.
The intake ports undergo a coating process to reduce pre-polishing surface irregularities.
Cam cap knock pins, which were originally only partially used, have been added throughout for improved assembly workability.
Meanwhile, the AE86's cylinder block sub-assembly features cylinder bores that undergo a modern honing process to improve bore machining precision.
Durability has been improved through the use of higher-rigidity cast iron and simulation-based modification of the crank-cap structure.
Also, certain intake and exhaust ports of the cylinder head sub-assembly have been given thicker walls.
The cylinder block sub-assembly also now includes bosses and ribs for transverse mounting, enabling its installation not only in the AE86 but also in front-wheel-drive vehicles.
An AE86 with an engine assembled using these parts and that has been restored using currently sold GR Heritage Parts, will be exhibited at the "Initial D 30th Anniversary 2days", at Fuji Speedway (in Japan's Shizuoka Prefecture) on Sept 13 and 14.
Customers can preorder the two new GR Heritage Parts at the event's GR Heritage Parts booth.
