Thread: The 4BD1 Part Numbers Reference

The military 110s currently being sold have a different Master Cylinder from the earlier civilian model. The civvie has a Girling product and the ex-army ones have a PBR.

If you ever need a new rubber seal for the lid of one of these it is P7154 manufacturer/distributor IBS Brake Parts - tr $22.14 - retail $32+.

Originally Posted by HotWired

Im just after the part no. for injector seals and tappet cover gasket.

I think the turbo tappet cover I have is an older style (shown below). Gasket is different to original and has little tabs to locate it.

Thanks for your help.

Sean

Which injector seals?

For the '-T' engine, the rocker cover gasket part number is 894462-5590.

Here are scraps from the parts book. Item number from the diagram is 49-1. In the parts list look for '49 1' in the first column 'Key No' There are several parts for the matrix to identify the particular 'year' and 'engine type' for your turbo engines the type is 'TRBG' (4BD1TRBG), and notice the same part number (second column) for the early and late type 'TRBG'

Injector seals:
Item 8, Isuzu part number 515315-0030
Item 15, Isuzu part number 915339-0510

Thanks for that.

Engine is a factory fitted 4BD1. The part number for tappet cover looks like the one I have.

I am after the top injector seal (no. 15).

Quick question about no. 8, is this the tappered steel bit above the nozzel of the injector?

Originally Posted by HotWired

Thanks for that.

Engine is a factory fitted 4BD1. The part number for tappet cover looks like the one I have.

I am after the top injector seal (no. 15).

Quick question about no. 8, is this the tappered steel bit above the nozzel of the injector?

There are no tappet covers shown in those pics, only rocker covers and the acoustic cover for the rocker cover

Seal 8 is the copper seal that goes at the bottom of the hole for the injector and seals against the combustion pressure. Seal 15, excludes dirt from getting between the injector body and the hole.

Edit: the tappet covers fit over the tappet chest on the left side of the engine block.

Originally Posted by Bush65

There are no tappet covers shown in those pics, only rocker covers and the acoustic cover for the rocker cover

Seal 8 is the copper seal that goes at the bottom of the hole for the injector and seals against the combustion pressure. Seal 15, excludes dirt from getting between the injector body and the hole.

Edit: the tappet covers fit over the tappet chest on the left side of the engine block.

Even I knew that.

Lol thanks for the correction

Originally Posted by eeyore

Despite using various brands & different sources, I've found that often the oil filter elements (LR # 1878102201 to suit OEM civilian 4BD1 N/A) are packaged with the wrong sized o-ring. The small o-ring for the large bolt that clamps the housing to its base is correct, but the large o-ring for the base itself is usually both (slightly) too large in OD and too small in section. This happened again with my last filter purchase, and since I've re-used the old o-ring three times already, I decided I'd better buy some separately.

The correct size o-ring, sourced from CBC Bearings, is:
Part No. BS242
ID 101.6mm
OD 107.95mm
Section 3.53mm

I've fitted one of these CBC 0-rings with a new filter and no leaks. Oh, and if you're in Canberra, CBC Fyshwick are now out of stock but are willing to order more in. Cost is about $2 ea.

HTH

My new Sakura oil filter has this problem. It came with lots of different o-rings for various applications of the filter, but none are remotely close to the correct fit for the filter housing.

FYI the ID of the correct o-ring of 101.6mm = exactly 4". (I was curious if the random decimals equated to something sensible).

The section you've listed in "mm" is bigger than the results I get for that o-ring. Most listings say 1/8" section.