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Engine repower
Submitted By: kiwipete
Date Created: 06-29-2005
Description: This is the plan:
I have an old Volvo Penta AQ200 / Chev 305 core in my shed that I am going to re-build up to Volvo AQ225D spec and repower my boat with it next winter.
(A V8 always sounds better than a 6 cyl. Right?)
I have been quite succesful in getting most of the trim bits I need to build this up.
So far I have found 5 Exh manifold sets, An intake assy with correct Q'jet carb and flash arrester, engine mount brackets, Damper for the flywheel, Raw water pump assy, Correct oil pan and matching dipstick / tube set.
TradeMe has taken a big hit on this while I gather up all the bits I need to make this look like a Factory Engine of the correct period.
I will photo doc this once the block comes back from the engine shop and the assembly process begins.
Read on.....
Related Projects: SHANANA
    (Engine repower)
    Dinghy repaint
Tools / Materials: Go to the Boating Store


Rebored engine block on the stand.
My newly freshened and rebored (+.030" OS) engine block mounted onto the stand.
The top decks have been machined and everything is trued up as new.
The crankshaft was ground to .010" us on the mains, B/E are STD.
Camshaft is a new Sealed Power CS274 std cam

Lower Left side view of block.
The crank has been finally installed to the block.
The long main brg cap bolts are to secure the windage tray which will be fitted later in the assembly process.

Engine Block, Underside view


Left Bank, Top view.
The bare surfaces have all been sprayed with LPS Metal Protector Spray to stop any humidity corrosion forming on the surfaces of the block.
This cleans off with Kerosene and leaves a nice clean surface to work with afterwards.

The boss is watching me ( I 've got to keep moving)
All the pistons are installed and the RH head is fitted.
Actually the hound has not got a clue as to what I'm doing, but he still needs to give it all a big woofing. (According to him)

Rear View


Ready for the next Head
Just got to clean the top block surface and clamp down the Left Head.

Both heads are on and the intake assy is installed.
That was a problem, one of the bolts pulled out the threads before it had reached the required torque and then the race was on to get the Helicoil insert installed and the manifold refitted before the sealants went off.
The problem was really due to the manifold bolts all being too short (1") so I replaced all with 1,1/4 NC so that wont be an issue again.
New valve train all the way back to the camshaft.

Ready for the tinware


Top view.
My 'new' Mallory electronic distributor.
Another TradeMe bargain.
The flexplate shown was fitted to check fit a new Delco Mercruiser Marine starter. Unfortunately I need to have a 13" flywheel for this application so this starter wont be used.
I have located a Nippon Denso starter now with multibolt pattern that will fit up to a 13" flywheel

All the parts are coming together slowly. All the tin ware has been galvanised to protect the bits from salt attack.
Overhauled carby is sitting in place.

RH side Upper view


Nearing final stages
The sump is now fitted and the oil system primed ready to go.
I have fitted a Mallory points type distributor for startup so I dont risk frying up the electronics in the other new Mallory.
My old buddy is not going to miss getting in the picture.

Water pumps fitted in place now.
The Sea water pump has been overhauled but the Block recirculating pump is yet to be serviced.

Nearly time for startup.


RH side
You can see the oil pan clearly in this shot.
Big problems here as I was not able to get an oil pan with the dip stick on the RHS.
I had the piece cut out of the left and grafted into the right side.
Cast Aluminum pan - easy right?
The welding caused to sump to pull in from each end so it had to be cut down both sides and pulled back straight before rewelding.
It had been repaired previously as the damage appeared to be from a con-rod departure.
It is now all straight and true again so hopefully there will not be any leaks.

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