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Engine woes. ! !

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JT7196
Posts: 1054
Joined: Sat Feb 13, 2016 7:22 am

Re: Engine woes. ! !

Post by JT7196 » Mon Jan 14, 2019 11:23 pm

x

bop
Posts: 106
Joined: Mon Feb 15, 2016 3:26 am
Location: Alberta Canada

Re: Engine woes. ! !

Post by bop » Wed Jan 16, 2019 6:13 am

Hi Al,
I am slowly rebuilding my Daimler 15 engine which looks to be a similar build to yours. The following is how I replaced the pistons/rings on my engine. (Note crankshaft was removed)

1.Put piston into cylinder from the top (using ring compressor), with only the bottom oil ring installed below wrist pin (may not need to put any rings in depending on piston type)
1a.JPG
Make sure piston wrist pin hole is visible!
2. Feed con rod through bottom of engine. Install wrist pin. Slide assembly down so bottom of piston is flush with bottom of cylinder. Now tighten wrist pin bolt (75 in/lbs) and bend over locking tabs.
111a.JPG
Move assembly back up the cylinder so ring groves are visible.
11a.JPG
Install piston rings and using ring compressor slide piston assembly part way down cylinder. Do same for all cylinders
3. Install crankshaft and main bearings. Move first con rod down until it reaches crankshaft at bottom of stroke. Install con rod bolts and tighten bearing cap. Do same for all cylinders

I'm Canadian "Hey", so pardon the terminology! Wrist pin = gudgeon pin etc.

Tar Bob

JT7196
Posts: 1054
Joined: Sat Feb 13, 2016 7:22 am

Re: Engine woes. ! !

Post by JT7196 » Wed Jan 16, 2019 9:53 am

Hi Bob, thanks for the super pictures etc, I’m pretty sure the it is impossible to fit the Pistons this way on the “Eleven” engine, as the Conn Rod is not long enough to allow the Gudgeon Pin to be inserted fron the top.
When I strip the engine for inspection, I’ll experiment just to make sure, but I’m pretty sure I’m right .
We will see. ! !
Will remove and strip engine on my return from Australia at the end of February.
I will also take some pictures, which may help others when stripping / rebuilding their engines.

Cheers Alan :D U

PS , It may be possible if I were to purchase a set of Pistons without the Oil Control Ring below the Gudgeon Pin.
We shall see.........😊
Last edited by JT7196 on Fri Jan 18, 2019 6:11 pm, edited 2 times in total.

grahamemmett
Posts: 662
Joined: Mon Feb 08, 2016 8:12 pm
Location: Northwich, Cheshire
Contact:

Re: Engine woes. ! !

Post by grahamemmett » Wed Jan 16, 2019 12:00 pm

I have to say, the shared expertise on this forum is incredible. A wonderful repository of knowledge.
Graham Emmett
Northwich, Cheshire
Joint DB18 Registrar (with Marcel Renshaw)
DB18 1949 LCV522 (Yes that one with the P100s)
https://www.db18.org

bop
Posts: 106
Joined: Mon Feb 15, 2016 3:26 am
Location: Alberta Canada

Re: Engine woes. ! !

Post by bop » Thu Jan 24, 2019 7:40 pm

Hi Al,
Stumbled across this topic on the old forum
http://archive.dloc.co.uk/forum/topic.a ... am,bearing
It might give you some ideas

Bob

Rolf B.
Posts: 85
Joined: Wed Apr 05, 2017 7:07 pm
Location: 68309 Mannheim, Germany

Re: Engine woes. ! !

Post by Rolf B. » Wed Feb 27, 2019 10:42 am

Hello Al,

after the complete rebuild of the engine of my 1933 Daimler 15 Sports Coupé the engine was refitted in the car and the cooling system filled with Evans coolant. Round about one hour later we - my son and I - saw coolant seepage from the side of the head gasket at several points, but without having had run the engine after refilling the cooling system. We've used an original new old stock gasket and not a reproduction one, because we've thought this should be the more secure version. This seems to be the same appearance as you've described about your LA 11 engine in your post dated Dec 11 2018.

I would be pleased to get your experience with your ideas to stop the waterseepage, because we've had never before such a phenomenon after rebuilding an water cooled engine.

Kind regards
Rolf B.

JT7196
Posts: 1054
Joined: Sat Feb 13, 2016 7:22 am

Re: Engine woes. ! !

Post by JT7196 » Fri Mar 01, 2019 9:34 pm

Hi Rolf. I wish that I knew the answer to that one, I’ve been plagued by this problem for Years !!
On the last rebuild I coated the Gasket with Wellseal both sides and allowed to dry for a few minutes to “ Flash off” but still am getting slight leakage, like you, I also only use NOS Payne Gaskets, the last one ,I actually annealed, hoping that it would seal better, but to no avail, I’m afraid.
Does anybody out there know the answer ? ?

Cheers Al 😊

Ps, I have also tried Squires Compound , ( Hylomar) ,alway thought that this was the best, but when stripping the Engine I noticed that it does tend to intrude into the waterways etc as it’s quite thick
, so used Wellseal instead on the subsequent rebuild .
Cheers Al 😊😊

Rolf B.
Posts: 85
Joined: Wed Apr 05, 2017 7:07 pm
Location: 68309 Mannheim, Germany

Re: Engine woes. ! !

Post by Rolf B. » Sat Mar 02, 2019 9:55 pm

Hello Al,

thank you for your reply. This afternoon we demounted the cylinderhead and located the reason for the coolant seepage from the side of the head gasket. The lower threads of the studs are mounted in open thread holes of the engine block. These open thread holes reaches into the water jacket of the engine block. The engine coolant is penetrating through the gaps between the threads of the engine block and the threads of the studs.

As the highest point of the radiator is round about 1 ft. over the cylinder head, there is hydrostatic pressure which allows the coolant to reach the head gasket and even higher points. We found coolant oozing out of the threads where the cylinder head nuts are tightend at the upper threads of the studs. The leaking coolant out of this points was running all over the top of the cylinder head.

But back to the head gasket. The coolant which is penetrating through the lower threads of the studs can enter sideways into the asbestos like material of the cylinder head gasket, because the head gasket don't have these eyelet rings for the studs which reach into the water jacket as all the other wholes for the combustion chamber and the studs do have which are fixed in the engine block in blind holes.

Then we do have another reason for the leaking. When overhauling the engine we found all the threads for the studs in the engine block are in bad state and we fitted Helicoil threads. Now we do have three threads in one fixing. The thread in the engine block, the thread of the Helicoil and the the thread of the stud. So coolant has much more chance by hydrostatic pressure to follow less resistance.

Next step of our work is to close all the gaps between the threads in the engine block, Helicoils and studs by Loctite 542 thread sealing. So under normal circumstances we will stop the flow of coolant through thegaps of the lower thread fixings of all the studs.

I hope we had found the answer for troubleshooting.

Cheers
Rolf B.

JT7196
Posts: 1054
Joined: Sat Feb 13, 2016 7:22 am

Re: Engine woes. ! !

Post by JT7196 » Sun Mar 03, 2019 5:41 pm

Hi Rolf, now I think you have hit the proverbial Nail on the Head, re the water seepage through the Head Gasket , via the Stud Holes, neve actuall gave it a thought, so will investigate when I remove the Cyclinder Head, as I’m having to remove and strip the Engine ....... don’t ask. !!

Cheers Al
Last edited by JT7196 on Fri Mar 08, 2019 8:54 am, edited 1 time in total.

Rolf B.
Posts: 85
Joined: Wed Apr 05, 2017 7:07 pm
Location: 68309 Mannheim, Germany

Re: Engine woes. ! !

Post by Rolf B. » Sun Mar 03, 2019 6:15 pm

Hello Al,

please keep me up to date about your investigations and results.

Best regards
Rolf B.

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