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Richard/SIA
Richard Brengman
No. Nevada
(361 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Buick V6 experts, 3.8 head to 225 block?
Posted by: Richard/SIA
Date: June 18, 2020 01:37AM

Been away for while but now sort of back into a British V conversion, Buick V6 and Saginaw 4-speed into TR4 chassis and Dio Tipo body.
Trying very hard to keep it late 60's "period correct".
Hoping there may be a Buick V6 expert or two here?
Seems the old V6's may have more use here than anywhere else with the exception of some Jeep forums.

Trying to hop-up an old Buick 225 V6 without spending silly money, custom cam & lifters are already over $400.00.
Originally this was just going to be a quick rings & bearings, like that EVER works out.

Got it apart and decided that the crank will need to be ground, the cam is not good enough, the "Ported" 225 heads are unlikely to flow enough........
Yep, mission creep is getting to me pretty badly.

I have John Thawley's Buick Free Spirit Power Manual but it's from 1980 and pretty much out of date as virtually no referenced part numbers are still available.
He refers to all pre-79 heads as boat anchors, implying that the '79 up heads will work on earlier blocks, but then mentions that  "..problems are encountered in effecting a head gasket seal due to enlargement of some water passages".
Hmm, I do have a vertical mill, so should be able to "O-Ring" as needed?

These were very popular engines to build years ago ,they went into everything imaginable.

The '79 up heads flow a LOT more than the earlier version. I've confirmed that they do bolt up.
Next I will compare head gaskets, I've already noticed some holes in early heads that are not there in late, for oil?

And for the nay-sayers, sure, a later engine would be "Easier" to do, if you discount all the ECU, VVT, CAT, Sensors, etc. complexity.
This is to be a budget 60's period correct build as much as possible, a head upgrade will not be apparent to casual observation.
So, anyone know HOW to adapt the later heads, or the definitive reason WHY it cannot be done?

I do have intakes for both types of heads.


mgb260
Jim Nichols
Sequim,WA
(2058 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Buick V6 experts, 3.8 head to 225 block?
Posted by: mgb260
Date: June 18, 2020 10:30AM

Richard, I've never mixed odd and evenfire parts but I would lay the later gaskets on the block and compare. I remember there was some welding required. You have to use the evenfire intake with the heads too. What did you end up with on your fuel injection and IRS?


Richard/SIA
Richard Brengman
No. Nevada
(361 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Re: Buick V6 experts, 3.8 head to 225 block?
Posted by: Richard/SIA
Date: June 18, 2020 01:20PM

Past year+ has been a soap-opera with moving home and shop, so nothing done on the Trick-6.
Now working to complete and sell this TR/Buick/Dio Tipo in order to fund building a shop on my own property.
Paying shop rent leaves too little for building my cars.
Constant advice is to just give up the cars and shop, then do WHAT with my time?

Today I am looking into the possibility of making my own copper head-gaskets.


7sand8s
Dennis Miller

(28 posts)

Registered:
09/21/2008 10:47PM

Main British Car:


Re: Buick V6 experts, 3.8 head to 225 block?
Posted by: 7sand8s
Date: June 18, 2020 04:33PM

Some info about the V6:
[www.novak-adapt.com]


mgb260
Jim Nichols
Sequim,WA
(2058 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Buick V6 experts, 3.8 head to 225 block?
Posted by: mgb260
Date: June 18, 2020 07:16PM

Richard, Since the newer heads use pushrod oiling it doesn't matter if the block to head oiling holes are covered. You just don't want water leaks or blockage.


Richard/SIA
Richard Brengman
No. Nevada
(361 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Re: Buick V6 experts, 3.8 head to 225 block?
Posted by: Richard/SIA
Date: June 24, 2020 11:20PM

Planning to drill and tap the block oil passages for plugs.
Mostly to reduce the possibility of their contributing to head gasket failure.
Blasted Kung-Flu is slowing everything up.
Block cleaning should be ready Thursday.
Then I may do some clean-up of casting flash, ream oil galleries, etc.


Richard/SIA
Richard Brengman
No. Nevada
(361 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Re: Buick V6 experts, 3.8 head to 225 block?
Posted by: Richard/SIA
Date: June 27, 2020 01:55AM

Got the block back and casting flash ground off.
Block was pretty good to begin with, heads are nastier.
Now sorting my reamers to find what I need to open up oil galleries.



roverman
Art Gertz
Winchester, CA.
(3060 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Buick V6 experts, 3.8 head to 225 block?
Posted by: roverman
Date: July 16, 2020 07:31PM

Hi Richard,
this be an odd-fire/ gallop motor ? IF you can find the "Buick Racing Engine Book, from Buick, is best of best.

On my build list, a 4.1L block, have a new forged 3.625" crank, H beam rods and Stg.II alum heads. All together, I guess a Stg. 1.5 ?
Cheers, Art.


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