186S

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Page created by August 25th 2007:

Recently restored Holden 186S. Click to Enlargen. Photo by Blissy.

[edit] 186S:

186 Cubic Inches Displacement, 6 cylinders.
Bore 3.625"
All the red sixes have the same 3.00" stroke except the 201, 202 and 3.3 which have a 3.25" stroke.

Blue and black 3.3's also have a 3.25" stroke.

These engines were originally fitted to HR Holdens, then HK-T-G. They used adjustable valve gear.

The Red Baron's Shed
Red Baron dissembles Blissy's 186s images
Richard Zurawski's Shed

Holden 186S engine. Click to Enlargen. Photo by Blissy.

The Red Baron rebuilds Blissy's 186s

Blissy's Shed

X2 and 186S Header Part Numbers
Submitted by 72GTRXU1 on Mon, 07/05/2007 - 12:56.

Holden 186S engine badge as fitted to HR Holdens with dual throat Stromberg Carburettors. Click to Enlargen. Photo by Old Holden.

I have been consulting with Dr Terry and others on the Torana forum and this is what we have come up with.
X2 Front 7428493
X2 Rear 7428495
186S 161S
173S LC XU1 Front 7433655
186S 161S
173S LC XU1 Rear 7430583
LJ XU1 Front 7428493
LJ XU1 Rear 7430583
There are 3 front sections: (A) Plain X2 (B) Heat riser drilled and (C)Heat riser Blank. As can be seen, the X2 Front and the LJ XU1 Front have the same Part Number. We assume that the Plain one (A) has been replaced with the Blank heat riser (C).
Any of the 3 different front sections will fit any of the motors including the X2. However where the auto choke is to be used - part number 7433655 (heat riser drilled) must be used. The rear X2 will not fit any other vehicle except the X2 unless a custom engine pipe is fabricated. The X2 rear flange points more downward rather than more rearward.
I hope this helps
72GTRXU1 aka Bazza

Holden 186 engine. Click to Enlargen. Photo by The Red Baron.

Red 186 Identification chart.

MODEL	Introduced mm/yy	Finished mm/yy	Engine prefix	Capacity CuIn (cc)	Power bhp (kw)@rpm	Torque ft.lbs.(Nm)@rpm	Compression
HR	4/66	1/68	186A	186(3048)	126(94)@4200	181(245)@1600	9.2
HR	4/66	1/68	186X2	186(3048)	145(108)@4600	184(249)@2200	9.2
HK	2/68	5/69	186P	186(3048)	126(94)@4200	181(245)@1600	9.2
HK	2/68	5/69	186S	186(3048)	145(108)@4600	184(249)@2200	9.2
HT	5/69	7/70	186H	186(3048)	130(97)@4400	181(245)@2000	9.2
HT	5/69	7/70	186S	186(3048)	145(108)@4600	184(249)@2200	9.2
HG	7/70	7/71	186H	186(3048)	130(97)@4400	181(245)@2000	9.2
HG	7/70	7/71	186S	186(3048)	145(108)@4600	184(249)@2200	9.2


	Holden 186S engine badge as fitted to HK-T-G Holdens with dual throat Stromberg Carburettors. Click to Enlargen. Photo by Old Holden.

Holden 173 Engine disembled, typical of all Red 6 Engines. Note the Rockers are Adjustable because it is a 149 Head. Standard 173 Heads use Non-Adjustable Rockers. Image by Bubsy. Click to Enlargen.