Toyota MR2 AW11
Crank tolerances were within 0.035-0.050mm, conrod pins were 0.035mm according to plastigauge.
For sheer fun I measured conrod pins with my micrometer and all four were bit more than 41.99mm (very near to 41.995)
Decided to go with ACL std sized bearings.
This is where we start. One oil pump with small gearset, a.k.a. late model oil pump. Stock gears are marked with dots, I dont know why.
Remove stock gears and wash everything with care.
Insert Toda gears.
Lubricate freely. I used Red Line installation goop.
After this I checked the gear cover still fits and added a drop of Permatex thread locker into screw threads. The thread locker I used is good up to +150C.
Torque to 10Nm. All done 🙂
A box full of valves has arrived!
Intake + exhaust valves in separate boxes
New vs. old
As much information as possible about toyota 4A-GZE 365cc injectors. This post will get some updates later.
Nozzle. This type might do twin stream to both intake channels.
Bottom seal diameter is around 16mm. I forgot to measure the height.
Toyota calls this part insulator, injector vibration. Part number 23291-41010
Part number is 23250-16061. There are some differences between injectors, mine seem to be marked white so the complete part number for my injectors is 23250-16061-04.
Older 4A-GZEs had 23250-16060 injectors. I’m unsure how they differ from these.
From bottom seal center to upper seal center (c-to-c) is around 62mm
Side view
Total length is 72,5mm
Connector. Dirty AF.
The rubber thing next to connector and “below” top o ring should be Grommet (For fuel injector) – part number 90480-13005.
The widest point is 21mm
Nozzle diameter is 10,4mm
Another nozzle picture
Top o-ring diameter is 11,5mm. Toyota calls this one Ring, O (For fuel injector) – part number is 90301-07001.
Thickness is 2mm
The other wide bit at the bottom of the injector, 16mm.
Nothing really spectacular here, they’re awesome. Pistons fit too 🙂
Here is the corroded exhaust camshaft getting polished
…and testfitting it
Brand new intake camshaft
Quick test with the coil on plug. This is one of those long Lexus COPs that are used in RX300. It fits but some fabrication is needed.
…and last, one of the three corroded valves. One might think that the corrosion would be on the exhaust valves, but for some reason it only affected intake valves.
At least three valves were corroded. While cleaning them, the hard coating just flaked off. Shit luck. Ordered a full set of supertech standard size valves.
All clouds have silver bla blaaa. Luckily I found a set of 20v head cam followers. My 20v head was missing those. Also, found a set of 1SZ-FE cam followers. I’ll try to see if I could get those work on my 16v head as solid cam followers.
Got IN/EX HKS 272 degree 8.1mm lift camshafts with HKS springs. IN was brand new but EX had been sitting somewhere where it had attracted rust. Someone then had machined the camshaft and it was really good. Garage neighbor gave a hand and polished the bearing surfaces for me.
Auto Verdi sent me four conrods, which felt like they were made by elves out of mithril.
…and just got a pile of plastigauge so I can check bearing tolerances. For proper tightening torque, I have to wait a little bit longer. Ordered a high tech torque wrench from germany, but it hasnt arrived yet.
Critical things I’m still missing:
…was that all?
Checking pistons and rings:
Gap on fourth cylinder is 0.35mm.
Pistons seem to fit into block. That is a good thing.
A package from Manon Racing Products arrived, containing Toda timing belt and oil pump gears, N2 style additional timing belt tensioner (or guide) and a crank girdle.
Timing belt tensioner. Fitment is very good.
And the crank girdle. A serious piece of hardware. I needed only some stiffening but now the engine will be bombproof.
Veeery nice 🙂
At last! I though I had lost forever my inexperienced driver sign. I left it in the most secure place I could imagine: behind the two posters of Widrics race car.
My Raybrig shirt found its final resting place:
It has been signed by Raybrig’s race queens, who invited me into some kind of raffle. I won something and I had to choose between three things and one of the things was the t-shirt. The shirt is still hanging on the wall in the picture below:
I wanted to see Kazumi Kondo!
Yes
Tokyo Auto Salon 2006
The four longnoses going towards Makuhari messe. LtR: Maladar, Monsieur Parkour and k-0ne.
A bit later k-0ne slipped into something more comfortable:
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