Rajo-head questions
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Topic author - Posts: 20
- Joined: Mon Feb 04, 2019 11:37 am
- First Name: Anton
- Last Name: Seelmann
- * REQUIRED* Type and Year of Model Ts owned: Touring 19; Speedster 13/Rajo; Pickup 21; Tudor 25; Touring 25/Fronti; Touring 1909
- Location: Germany
- MTFCA Number: 26014
- Board Member Since: 2005
- Contact:
Rajo-head questions
I am currently starting a complete overhaul of my 13 Speedster with Rajo-Head and need your help.
First question: is it possible to check the valves for opening and closing with respect of piston travel. Or is there another method and if so, with which values?
Secon question: How tight should the head bolts be (first time, second time and finally)?
Many thanks to everyone
[image][/image]
First question: is it possible to check the valves for opening and closing with respect of piston travel. Or is there another method and if so, with which values?
Secon question: How tight should the head bolts be (first time, second time and finally)?
Many thanks to everyone
[image][/image]
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- Posts: 463
- Joined: Mon Jan 07, 2019 12:32 am
- First Name: Erik
- Last Name: Barrett
- * REQUIRED* Type and Year of Model Ts owned: 1913 speedster 1924 touring 1925 dump truck
- Location: Auburn, Ca.
Re: Rajo-head questions
I set valves at .012” intake and .014” exhaust at TDC compression stroke. Torque head at 25, then 40, then 50 lbs/ft. if you are using the early block. Go to 55 lbs/ft if you are using a later block. Retorque several times until it holds torque.
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- First Name: Joe
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Re: Rajo-head questions
I used stud so less chances of pulling threads on the block, the studs have fine thread on the top side and used hardened washers.
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- Posts: 1056
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- First Name: Joe
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Re: Rajo-head questions
I know they are not the engines I use to play with but I would hate to lift the head on compression.
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Topic author - Posts: 20
- Joined: Mon Feb 04, 2019 11:37 am
- First Name: Anton
- Last Name: Seelmann
- * REQUIRED* Type and Year of Model Ts owned: Touring 19; Speedster 13/Rajo; Pickup 21; Tudor 25; Touring 25/Fronti; Touring 1909
- Location: Germany
- MTFCA Number: 26014
- Board Member Since: 2005
- Contact:
Re: Rajo-head questions
Erik, many thanks for your answer/service. Early block is 1913? Engine-number: C171352; its a canadian serial number from August 1918 (Bruce Mc. Calley). I will start my project tomorrow. May I ask again if there are major problems?
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- Posts: 463
- Joined: Mon Jan 07, 2019 12:32 am
- First Name: Erik
- Last Name: Barrett
- * REQUIRED* Type and Year of Model Ts owned: 1913 speedster 1924 touring 1925 dump truck
- Location: Auburn, Ca.
Re: Rajo-head questions
Certainly, and as suggested it is a good idea to use studs and nuts. Dan McEachern has them.
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- Posts: 215
- Joined: Sun Jan 06, 2019 12:55 pm
- First Name: Walt
- Last Name: Berdan
- * REQUIRED* Type and Year of Model Ts owned: '18 Speedster had 25 touring and 26 coupe
- Location: Bellevue, WA
- MTFCA Number: 16421
Re: Rajo-head questions
Not sure if this helps but if Dan is out of stock on the studs, and if the deck height is the same as on a Fronty, the long studs for a Model A engine work just fine. I used them with my Fronty so I could ensure full use of the threads in the block without needing to do any grinding or modifying of head bolts. BTW, with the studs having fine threads, I still torque to 50 fl/lbs on the nuts which would be a higher torque value than I would trust torquing bolts in the block. Other opinions may vary but this has worked fine for me.
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- Posts: 1190
- Joined: Sun Jan 06, 2019 11:08 am
- First Name: DAN
- Last Name: MCEACHERN
- * REQUIRED* Type and Year of Model Ts owned: too many. '14 touring, 2 depot hacks, 2 speedsters
- Location: ALAMEDA,CA,USA
Re: Rajo-head questions
Eric's advice is pretty much spot on the money. Studs are nice, but you need to have sufficient fire wall clearance to get the head on and off and that might not be possible in this case looking at the picture. You really need to measure your head for the correct length studs as some heads have been surfaced a bunch etc. Walt is correct that long A head studs will work in many instances but. I have a pretty fair assortment of studs in stock for various heads, but it all depends on the length you need.
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- Posts: 42
- Joined: Wed Feb 06, 2019 11:52 am
- First Name: Reuben
- Last Name: Kugel
- * REQUIRED* Type and Year of Model Ts owned: 1915 Touring 1926 RAJO Speedster
- Location: Pewaukee WI
- MTFCA Number: 49871
- MTFCI Number: 24323
Re: Rajo-head questions
I have the same head on my 26 Speedster. Anyone have a good way to get to the 5 bolts that are behind the exhaust/intake manifold for a re-torque? I have a very expensive NOS copper gasket and would hate to remove the manifold for re-torque. Thanks
1915 Touring
1926 RAJO Speedster
1926 RAJO Speedster
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- Posts: 1190
- Joined: Sun Jan 06, 2019 11:08 am
- First Name: DAN
- Last Name: MCEACHERN
- * REQUIRED* Type and Year of Model Ts owned: too many. '14 touring, 2 depot hacks, 2 speedsters
- Location: ALAMEDA,CA,USA
Re: Rajo-head questions
You probably have no choice, but resealing the manifold gasket should not be an issue. Some hi temp RTV will seal it. Since MOST of the clamp pressure to seal the cylinder bores is done by the two rows of bolts directly adjacent to the cylinders, retorque those for sure if you don't want to pull the manifold, but it certainly would be best to retorque all of them. In hindsight, with a new head gasket- put a junk manifold gasket on there until you pull it to retorque the head and then put on the manifold gasket of choice, but you're past that point now.
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Topic author - Posts: 20
- Joined: Mon Feb 04, 2019 11:37 am
- First Name: Anton
- Last Name: Seelmann
- * REQUIRED* Type and Year of Model Ts owned: Touring 19; Speedster 13/Rajo; Pickup 21; Tudor 25; Touring 25/Fronti; Touring 1909
- Location: Germany
- MTFCA Number: 26014
- Board Member Since: 2005
- Contact:
Re: Rajo-head questions
where can I buy a manifold seal as in the picture for my 8-valve Rajo?
And thanks to Erik Barret, Joe Bell, Walber, Dan McEachern for your comments.
Sorry for my Bavarian English
And thanks to Erik Barret, Joe Bell, Walber, Dan McEachern for your comments.
Sorry for my Bavarian English
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- Posts: 1190
- Joined: Sun Jan 06, 2019 11:08 am
- First Name: DAN
- Last Name: MCEACHERN
- * REQUIRED* Type and Year of Model Ts owned: too many. '14 touring, 2 depot hacks, 2 speedsters
- Location: ALAMEDA,CA,USA
Re: Rajo-head questions
Anton- no one makes new intake/exhaust gaskets for that Rajo head. Simply reuse the old one with some high temperature RTV around the port openings. If you need a new one, your only option will be to cut one from hi temperature gasket material. McMaster-Carr offers some Kevlar material that works quite well, and something similar should be available in Germany.
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Topic author - Posts: 20
- Joined: Mon Feb 04, 2019 11:37 am
- First Name: Anton
- Last Name: Seelmann
- * REQUIRED* Type and Year of Model Ts owned: Touring 19; Speedster 13/Rajo; Pickup 21; Tudor 25; Touring 25/Fronti; Touring 1909
- Location: Germany
- MTFCA Number: 26014
- Board Member Since: 2005
- Contact:
Re: Rajo-head questions
Dan, thanks for your answer!
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- Posts: 127
- Joined: Tue Jan 08, 2019 8:23 pm
- First Name: Andrew
- Last Name: Webb
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Re: Rajo-head questions
Is that a model 30 or c35 Rajo please ?
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- Posts: 117
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- First Name: John P.
- Last Name: Steele
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Re: Rajo-head questions
It's a Model C
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Topic author - Posts: 20
- Joined: Mon Feb 04, 2019 11:37 am
- First Name: Anton
- Last Name: Seelmann
- * REQUIRED* Type and Year of Model Ts owned: Touring 19; Speedster 13/Rajo; Pickup 21; Tudor 25; Touring 25/Fronti; Touring 1909
- Location: Germany
- MTFCA Number: 26014
- Board Member Since: 2005
- Contact:
Re: Rajo-head questions
It is a model C (but stamped is T or bad stamp?) 35; production-number 8546
my speedster at the moment
my speedster in december 1919 with my dog Mona (she has a racing driver license)
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- Posts: 42
- Joined: Wed Feb 06, 2019 11:52 am
- First Name: Reuben
- Last Name: Kugel
- * REQUIRED* Type and Year of Model Ts owned: 1915 Touring 1926 RAJO Speedster
- Location: Pewaukee WI
- MTFCA Number: 49871
- MTFCI Number: 24323
Re: Rajo-head questions
Anton-
I got a NOS gasket for my C-35 head from Olson's Gasket in Washington.
Phone: 360-871-1207
Not cheap, but if want original he's the only place I found.
Good luck
I got a NOS gasket for my C-35 head from Olson's Gasket in Washington.
Phone: 360-871-1207
Not cheap, but if want original he's the only place I found.
Good luck
1915 Touring
1926 RAJO Speedster
1926 RAJO Speedster