Tag: 4a-gze

The tide has turned part 2

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After the crank got stuck, I disassembled everything:

Bearings looked still good and the molybdenium coating was not affected.

Little bit of measuring – picture below is staged 😀

While having the girdle plate on and everything tightened, the crank bore shrunk to 51,98mm. Didnt expect to see chunks of steel deform so much that the crank line bore would be out of spec (it should be 52mm)

Well, this meant a trip to machinist. Assembled everything back and made sure that the block and girdle were ready for the crank line honing.

Before honing:

…and after honing:

Plenty of cleaning ahead, but the machinist said that the inside diameter  is now 52.03mm.

The crank was also checked for straightness. Weirdly enough, it was 0.03mm out of straight, but now only 0.02mm. For some reason being stored for a year made it little bit more straight 😀

 

The tide has turned part 1

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I reached the turnaround point! Now I’m putting things back together and going towards working engine 🙂

There were problems, though.

New ACL bearings coated in solid molybdenium for extra slippery and first start safety.

Crank test fit. Stock bolts and oil pump.

Rear main seal bracket and the seal itself. Below, the gasket for the bracket.

Seal in place. Left side you can see the 22221 number which indicates the crank line bore sizes.

Glueing the crank girdle to place with Permatex Supra Grey. Main bolts swapped to ARP studs and nuts.

This is where the problems started.

I left the gasket goop to dry for an hour and came back to tighten the main stud nuts. I quickly glanced the ARP installation procedure and thought that it is funny how ARP recommends the tightening torque to be the same as Toyota stock, which is 60Nm. Tightened everything in three steps and then I tried to rotate the crank. It wasnt turning as freely as I hoped.

I checked everything. Removed nuts, removed studs and checked everything possible. Tried tightening again to 60Nm but no dice. There still was a point where the crank felt like it was stuck. Then I read the ARP installation document again and to my horror ARP recommendation wasnt 60Nm, instead it was 60ft/lbs, which is around 80Nm.

The crank seized totally. It only turned a bit when I helped it with the biggest rubber mallet I could find in our garage. Shit shit shit fuuuuuck.

Solid lifters for 4A-G

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The solid lifters are a nightmare 😀 I cant seem to get the gaps measured even with the thinnest solid one available. My gap tool thingy gives me unreliable results for some reason.

The thinnest is 5.12mm tall, and Im supposed to get minimum of 0.15mm gap on the intake side and 0.20mm on the exhaust side.

We’ll see. I wouldnt like to admit defeat here, because a lash cap lifter kit from supertech is megaexpensive

New pistons from Matrix Garage

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As the title says 🙂 Also, I got two Cometic MLS headgasket to choose from.

The box assistant was with me at the unboxing. Weirdly enough, her food comes in a box that is similar in size to this box. Wonder if she was actually looking for food? I know she has good memory.

One of the pistons. Designed by Yoshi at Matrix Garage, manufactured by Traum Pistons. These are MG’s shelf pistons, 81.5 oversize and with stock 1.2mm headgasket CR should be 10.5:1.

I’m going to use a 0.76mm headgasket. CR should be somewhere around 10.9:1 with that.

Some deburring is still needed. I’m going to get the same coatings on these pistons what I got for the previous ones.

4A-G headgaskets

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Some of the headgaskets available, both 16V and 20V. Cometic hgs are available in every color of the rainbow and I didnt list them all.

Edit: added Toda. I didnt know they had HGs 🙂

Edit 2: the information below can be outdated or wrong.

16V

Toyota 11115-16070 ?? 1.2mm (original)

Supertech HG-T4GE-83-1T 83mm 1mm 
Supertech HG-T4GE-83-1.3T 83mm 1.3mm

Je gasket TY1001-039 81mm 1mm

HKS Stopper 2302-RT001 82mm 0.6mm
HKS Stopper 2302-RT002 82mm 1mm
HKS Stopper 2302-RT003 82mm 2mm

HKS Bead 2301-RT008 82mm 0.7mm
HKS Bead 2301-RT009 82mm 1mm
HKS Bead 2301-RT024 82mm 1.6mm
HKS Bead 2301-RT010 82mm 2.0mm

TRD 11115-AE814 82.5mm 0.8mm metal
TRD 11115-AE802 82.5mm 1.1mm carbon
TRD 11115-AE824 82.5mm 0.5mm metal

Cometic C4166-040 83mm 1mm MLS
Cometic C4166-045 83mm 1.14mm MLS
Cometic C4166-051 83mm 1.3mm MLS
Cometic C4166-080 83mm 2mm MLS
Cometic C4166-120 83mm 3mm MLS <-seriously?

Cometic C4170-040 81mm 1mm MLS
Cometic C4170-045 81mm 1.14mm MLS
Cometic C4170-051 81mm 1.3mm MLS
Cometic C4170-080 81mm 2mm MLS
Cometic C4170-120 81mm 3mm MLS <-seriously? 

Power Enterp … 82.5mm 0.7mm bead

Toda 12251-4AG-006 82.5mm 0.6mm stopper
Toda 12251-4AG-008 82.5mm 0.8mm stopper 
Toda 12251-4AG-010 82.5mm 1.0mm stopper 
20V

TRD 11115-ae001 82.5mm 0.8mm

Cometic H1090SP3040S 81.5mm 1mm ??

Cometic C4605-040 83mm 1mm 
Cometic C4605-051 83mm 1.3mm 
Cometic C4605-060 83mm 1.5mm

Cometic C4604-040 81mm 1mm 
Cometic C4604-051 81mm 1.3mm

HKS Stopper 2301-RT038 82.5mm 0.6mm