Research note
Engine assembly bolt sizes (2026-10-27)
98 5VZ-FE (EPC catalog 671460, VZN185L, built 11/1995–08/2000) + the 88 3VZ-E oil pan (EPC 671440, VZN61LV).
Sizes come from Toyota part numbers: 915xx/916xx 9XXXX-G DD LL → DD = diameter, LL = length (checked against parts with published sizes). Pitch comes from FSM SS-2: M6 = 1.0, M8/M10/M11 = 1.25. 90xxx numbers carry no length.
Before buying, measure the old bolt. Anything marked "one source" or UNVERIFIED rests on a single listing or none.
Bottom end
| Part | Qty | P/N | Size | Head / washer | Torque | Status |
|---|---|---|---|---|---|---|
| Baffle plate bolt | 3 | 91621-60612 (→90080-11589) | M6×1.0×12 | hex, captive flat washer | none in FSM (use SS-2) | EPC + decode |
| Baffle plate nut | 2 | 90179-06080 (→90080-17237) | M6×1.0 | flange nut, on studs 90116-06119 | – | EPC |
| Strainer brace bolt | 2 | 91621-60612 | M6×1.0×12 | hex, captive flat washer | 7.5 N·m | EPC + decode |
| Strainer nut | 2 | 90179-06036 (→90179-06299) | M6×1.0 | hex nut, on pump studs 15183-65010 | 7.5 N·m | EPC; new gasket 15147-62020 |
| Rear oil seal retainer bolt | 6 | 91611-60616 (→91611-B0616) | M6×1.0×16 | hex, captive split lock washer | 8 N·m | EPC + decode (same P/N on the 88 3VZ-E) |
| Oil pump bolt ① | 4 | 91511-60820 (→90080-10169) | M8×1.25×20 | flange | see A/B note | EPC + decode |
| Oil pump bolt ② | 3 | 91511-60840 (→91511-J0840) | M8×1.25×40 | flange | see A/B note | EPC + decode |
| Oil pump bolt ③ (top-left corner) | 1 | 91512-61030 | M10×1.25×30 | flange | see A/B note | EPC + decode |
| 5VZ pan bolt | 15 | 90119-06727 (→90080-11177) | M6×1.0×10 | w/ washer | 7.6 N·m | one source (yotashop) |
| 5VZ pan nut | 4 | 90179-06080 | M6×1.0 | flange nut | 7.6 N·m | EPC. Pre-08/2000 = 15 bolts + 4 nuts; the FSM's 17 + 2 is the later layout |
| 88 3VZ-E pan bolt (this build) | 15 | 90119-06206 | M6, length UNVERIFIED | w/ washer | 7.6 N·m | EPC P/N only. Use the 88 bolts kept with the pan |
| 88 3VZ-E pan nut | 4 | 90179-06036 | M6×1.0 | nut | 7.6 N·m | EPC |
Oil pump A/B: unresolved. FSM LU-16 shows 1 bolt A (20 N·m) at the top-left boss, and 7 B (42 N·m). The EPC puts the single M10 at that same top-left corner, which would mean M10 = 20 N·m and M8 = 42 N·m. 42 N·m is exactly the SS-2 value for an M8 10T flange bolt (5 lines on the head). A 6T M8 (2 lines) is 21 N·m. Rule: read the head marks (SS-1) and torque per SS-2. Never put 42 N·m on an M8 with fewer than 5 lines.
Top end
| Part | Qty | P/N | Size | Washer | Torque | Status |
|---|---|---|---|---|---|---|
| Head bolt, 12-point (TTY) | 16 (8/head) | 90910-02077 | M11×1.25×96, 53 mm thread | plate washer 90201-11028 ×16 | 34 N·m + 90° + 90°, oiled | P/N EPC; size aftermarket only (Fel-Pro ES72168, Ajusa). FSM gives no max length → replace |
| Head bolt, recessed (8 mm Allen) | 2 | 90110-08013 | M8×100 | none | 18 N·m, oiled | P/N; length one source |
| Valve cover bolt | 16 (8/cover) | 90109-06275 | M6×1.0×25 | seal washer 90210-05007 ×16 | 6 N·m | qty/torque FSM; size one source |
| Water pump → block | 7 | not found | not found | – | 20 N·m | FSM qty/torque only. Measure old bolts or buy Toyota KIT-1052B. The 3 studs on the pump (90116-08270, M8) are for the water inlet |
Sources: catcar.info EPC (671460 groups 15-01, 11-05; 671440 group 11-05); toyotapartsdeal 1998 4Runner cylinder head + water pump lists; overlandmetric.com Toyota hardware database; yotashop (90080-11177, KIT-1054, 90116-06119, 90179-06299, 90109-06275, 90210-05007, 90110-08013, KIT-1052B); LGP/Ajusa 81046700; FSM LU-15/16, SS-1, SS-2, SS-27, EM-35, EM-50/51, EM-56, EM-98, CO-8.