MKI / MKII S type 240 340 & Daimler 1955 - 1967

3.8 L auction win!

Old Jun 8, 2020 | 10:13 PM
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Default 3.8 L auction win!

I was the winning bid today on a 3.8L engine from a Mark 10. I plan to swap it into my 240 (which is finally running great). It should fit, right!

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Old Jun 9, 2020 | 06:25 AM
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As the 2.4 litre engine is a "cut-down" 3.4 litre block, and the 3.8 litre is a bored out and linered 3.4 litre block, it should fit perfectly, but it probably won't take the triple cars that the Mark 10 had as the engine bay is a lot smaller on the Mark 2 bodies.
Don't forget the back axle ratio may not suit the larger engine revs wise.
 
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Old Jun 9, 2020 | 07:14 AM
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Hi Jim Beirne,
You bought an engine that has been sitting for 30 years. If I was you I would put a boriscope down the spark plug holes and check out the cylinders. I would also want to find out why every other cylinders compression is in the 130"s and the rest are in the 170's. If the valves are sticking or the rings are broken you could make a big mess of the engine quickly.

Lets us know how things go.

How are you shipping it from the west coast to the east coast? If you don't mind me asking what does that cost?
 

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Old Jun 9, 2020 | 07:15 AM
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Fraser is correct re carb fitment - the large aluminum air box will foul the inner fender at the points noted. The top edge will be just below and under the upper fender, so the inner fender needs to be opened up all the way to the top if you want to retain this intake. You'll also need some throttle linkage as I recall. It looks like you have some compression variances approaching 30% which seems high - perhaps someone who knows these motors will comment. Good luck with the project - I installed a straight port head on a Mark 2 a few decades back and it worked well.


 
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Old Jun 9, 2020 | 07:26 AM
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I'll probably replace the air box with pancake air filters like in this example
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The front carb looks to be a starting carb. A leak down test is in order, hopefully just some sticking valves.
 
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Old Jun 9, 2020 | 08:15 AM
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Hi Jim
Sounds like you have a plan. Let us know how it goes.

 
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Old Jun 10, 2020 | 09:03 AM
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Originally Posted by Jim Beirne
The front carb looks to be a starting carb.
The front carb is a carb just as the rear and middle carb's are. They all do the same thing which is throw gallons of fuel and air in to the plenum chamber which divides the mixture to the six cylinders.
There might be a starting carb or to give it its correct name the Automatic Enrichment Device (AED) but this is small barrel with an electric solenoid attached. I think I am right in saying it is different on the 240 which had Solex carbs not SUs and had a manual choke set up. I think they changed back to SUs but retained the manual choke. Please correct me if I am wrong.
 
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Old Jun 10, 2020 | 09:33 AM
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My 1968 240 has 2 SU HS6 AUD 256 manual choke carbs. The 3.8L I won is from a Mark X and has HD8's. My understanding is that a starting carb's jet is set up rich and is used in place of a choke. If you look carefully at the photos you will see a solenoid structure that is connected to a temp sensor that closes off the carb once it comes up to temp.



 
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Old Jun 10, 2020 | 01:28 PM
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You are right Jim that is the AED which is connected to the front carb and takes its fuel feed from the front carbs float bowl but all three carbs are set up the same and the AED does not have any influence over the working of the front carb. My S Type has two HD6 carbs and the AED which I have converted so I can switch it on and off from the cockpit rather than relying on the sometimes unreliable Otter switch.
Your compression problems might be a sticking valve but unlikely or you would have no or very little compression. It might be coked up valve seats which are leaking and would benefit from a decoke and valve seat re grind (you do not need hardened valve seats fitted as the XK engines all had them fitted from new. Just in case your local engine builder tries to pull a fast and expensive one on you) or if the engine has been sat for a long time it could be sticking piston rings and a good soaking with diesel down the bores might cure that.
 
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Old Jun 15, 2020 | 08:00 PM
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Ready to ship @ 770 lbs. I was going to pay for insurance until I read: "Used engines/motors (defined as any machinery which is used to propel a vehicle, boat or personal craft) and all used transmissions are excluded from coverage"!
 
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Old Jun 16, 2020 | 07:19 AM
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You just don't realize how heavy the XK engine is until you have to pick it out of the engine bay or in this situation ship it. My complete Lotus seven only weighed 1200lbs (550kilos) with half a tank of fuel.
 
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Old Jun 18, 2020 | 08:32 AM
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Cost to ship across country via YRC Freight - $385.
 
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Old Jun 25, 2020 | 06:30 PM
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It has survived the trip from Oregon in one piece. A little over a week in transit to New Jersey. Now I have to decide what to do with it next. Shops around here are charging $125/hr! I can work cheaper than that.
 
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Old Jun 28, 2020 | 09:23 AM
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Now that looks like one BEAUTIFUL engine.
 
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Old Jun 28, 2020 | 10:33 AM
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Hi Jim,
That shipping cost was a lot lower than I would expect. Was the engine shipped from a resident to a resident, shop to a terminal or terminal to terminal? A little details of the shipping would be helpful. I would have expected the shipping to cost 2 to 3 times what you paid.
 
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Old Jun 28, 2020 | 10:38 AM
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Hi Jim,
One more question, was the trans shipped too for the $385?
 
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Old Jun 28, 2020 | 03:58 PM
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I was not interested in the auto trans so he gave me a $400 credit, and made shipping easier. I hope to put a 5 speed on it.
The pick up address was an equipment company and the destination was a local shop. After delivery they ask for a review at I gave a positive one. Then they hit me with $100 surcharge saying the pickup address was residential! I think I'm gonna stop doing reviews.
 
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Old Jun 28, 2020 | 04:15 PM
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Originally Posted by Jim Beirne
I was not interested in the auto trans so he gave me a $400 credit, and made shipping easier. I hope to put a 5 speed on it.
The pick up address was an equipment company and the destination was a local shop. After delivery they ask for a review at I gave a positive one. Then they hit me with $100 surcharge saying the pickup address was residential! I think I'm gonna stop doing reviews.
Hi Jim,
Did you google the address that the motor was picked up from and see if it was a residential address? That's one of the reasons that I don't give a review for a week or two after I have work done around the house, ebay auctions etc.

Do you know which 5 speed you might use?
 
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Old Jun 28, 2020 | 09:53 PM
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Yes, On Google Maps it's a heavy equipment business! I disputed the charge. I'm not holding my breath.
The shop I shipped the engine to has a number of ford engines with Tremtec T-5's attached but I know you need a bell housing, adapter plate and rear mounts ect. I was looking at the kits from The Driven Man, I wonder if they would sell the kits minus the tranny?
 
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Old Jun 29, 2020 | 06:11 AM
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Hi Jim
Here is a bell housing I would use.
https://www.5speeds.com/modbell.html
 
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