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Author Topic: 186 Head wanted urgently!  (Read 14859 times)

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Offline Rothu

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186 Head wanted urgently!
« on: August 21, 2009, 05:52:00 PM »
Anybody have a good 186 head with hardened valve seats?

I've found the problem with mine was a leaking head gasket and a recessed exhaust valve on No. 1 cylinder. The head is off and I'm shopping around for prices on replacing just one valve.
BUT, if there is a good head out there, cheap, then I'll just replace the head itself.


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1976 SWB CF, 186 block, LPG customised VK EFI self ported Head, LPG converted Ram tube manifold, Extractors, Supra 5 speed, Falcon hwy Diff, HQ Disc brakes, Commodore 3 core cross-flow radiator, HEI, 90 litre LPG.
It can drive up a wall in 5th gear and across the Sun without overheating!

Offline JOE RYAN

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Re: 186 Head wanted urgently!
« Reply #1 on: August 21, 2009, 06:06:55 PM »
Since you have the head off tip the head on its side with the manifold inlet and exhaust ports facing up' then pour 50mm approx of kerosene into each valve port, if any valve is damaged or not seated properly the kero will leak out almost immediately. The kero will not have any adverse effect when the head is replaced on the motor. Check out the price of new valves I bought a couple about 18 mths ago from a engine recondictioner and they cost about $20 each

Cheers
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Offline Rothu

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Re: 186 Head wanted urgently!
« Reply #2 on: August 21, 2009, 06:16:07 PM »
Thanks joe,
The valve is so recessed that it's likely the seat has completely gone!
On top it sits about 4mm higher than the others, causing the pushrods and rocker to keep it open all the time.
so seat replacement is necessary and I don't have that equipment to do it.
Hence asking for a head if it's too expensive for just one valve seat..
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1976 SWB CF, 186 block, LPG customised VK EFI self ported Head, LPG converted Ram tube manifold, Extractors, Supra 5 speed, Falcon hwy Diff, HQ Disc brakes, Commodore 3 core cross-flow radiator, HEI, 90 litre LPG.
It can drive up a wall in 5th gear and across the Sun without overheating!

Offline Rothu

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Re: 186 Head wanted urgently!
« Reply #3 on: August 22, 2009, 06:47:43 AM »
Either a 186 or 202 recoed for gas head.
Need it urgently!
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1976 SWB CF, 186 block, LPG customised VK EFI self ported Head, LPG converted Ram tube manifold, Extractors, Supra 5 speed, Falcon hwy Diff, HQ Disc brakes, Commodore 3 core cross-flow radiator, HEI, 90 litre LPG.
It can drive up a wall in 5th gear and across the Sun without overheating!

able

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Re: 186 Head wanted urgently!
« Reply #4 on: August 22, 2009, 01:21:16 PM »
im in geelong and my beddy come with a 186 and its sitting in the back yard....

i don't know what condition its in but it was running when i pulled it out. my bedford had spent a few years sitting in the open before i bought her.

do you want me to take the head off and take a pic of the underneath to see if its any good?

im not experienced enough to be able to tell you.

ps. it was running on straight petrol
« Last Edit: August 22, 2009, 01:26:48 PM by able »
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Offline ben

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Re: 186 Head wanted urgently!
« Reply #5 on: August 22, 2009, 07:07:14 PM »
i have 2 i86's at epping. one was supposed to be a good motor one is supposed to be not a good one.

you can have it if you want.

i dont bother with hardened valves. i run straight gas until i blow a valve then pull a head off something else. red heads are expendble lol

actually put a 173 head on it. you sohuld get one of them for free also!! and youll get more compression and more power and the motor will take it being run on gas.


ben
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Offline Rothu

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Re: 186 Head wanted urgently!
« Reply #6 on: August 23, 2009, 11:33:25 AM »
Ben,
I'll definitely grab the "good" engine! ok, a 173 head you reckon? Why would it "take it" being on straight gas? Who's got one?

Able,
thanks, but don't use your time to pull the head off.
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1976 SWB CF, 186 block, LPG customised VK EFI self ported Head, LPG converted Ram tube manifold, Extractors, Supra 5 speed, Falcon hwy Diff, HQ Disc brakes, Commodore 3 core cross-flow radiator, HEI, 90 litre LPG.
It can drive up a wall in 5th gear and across the Sun without overheating!

Offline eddy

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Re: 186 Head wanted urgently!
« Reply #7 on: August 23, 2009, 04:41:02 PM »
my old dad used to tell me that all the time, "dont use your time to pull the head off" never did know what he was referring to ?  ;)
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ekm ...... never lead with your chin, let others lead with theirs

Offline Warren

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Re: 186 Head wanted urgently!
« Reply #8 on: August 23, 2009, 09:48:42 PM »
Quote from: eddy on August 23, 2009, 04:41:02 PM
my old dad used to tell me that all the time, "dont use your time to pull the head off" never did know what he was referring to ?  ;)

Thhats why you wear glasses :D
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I used to be vague..................Now I'm not so sure

Offline ben

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Re: 186 Head wanted urgently!
« Reply #9 on: August 24, 2009, 07:58:07 AM »
if you up the compression (by putting a smaller head on your engine) if your running petrol you can run into troubles with pinging, but if your running gas it can run at a higher compression.

i dont really know much about it just what people tell me.
 
a bloke told me he ran a 161 head on a 202 for 4 years on petrol and it went like stink.

im not sure id go that far.

pm me your number bro.

cheers
ben
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