I have a MF 35 1960 3 cyl perkins I totally rebuilt, started up and engine sounds great. I am getting blowby on all three combustion chamber caps. The old cap gaskets were circular, and the ones I replaced are shaped like the cap (copper). I took them off and put on new cap gaskets (shaped like the cap) and this time sprayed the copper gasket spray like you use on the head gaskets. I made sure it was all clean on the caps and the head, (surface and inside the hole). Torqued it all up to specs again and started, after about 30 seconds I got blowby on one and within a minute all 3 caps were getting blowby. Can anyone help me with this one, frustrating? thanks, John
MF35 3 cyl perkins combustion caps blowby
- Thread starter shrievy
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shona13
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- Massey Ferguson 148 .Chamberlain Super 70. Caterpillar D4. Chamberlain 354 FEL.Toro 268 rideon kubota L2002fel
G,Day shrievy.
If you still have the old copper gaskets and they look o.k. heat them red hot ,on the gas stove will do if you have nothing else red hot and let them cool of this will soften the copper ,put them on and paint wheel silver paint on the cap and both sides of the gasket put the cap on and tighten up before the paint dries I have done this before and it worked .
Happy Days .
Hutch
If you still have the old copper gaskets and they look o.k. heat them red hot ,on the gas stove will do if you have nothing else red hot and let them cool of this will soften the copper ,put them on and paint wheel silver paint on the cap and both sides of the gasket put the cap on and tighten up before the paint dries I have done this before and it worked .
Happy Days .
Hutch
shona13
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- Massey Ferguson 148 .Chamberlain Super 70. Caterpillar D4. Chamberlain 354 FEL.Toro 268 rideon kubota L2002fel
G.Day Rford .
I have worked on a lot of engines with Indirect fuel injection and I will try to keep this explanation as short as possible.
Basically the precombustion chamber aids ignition of the diesel fuel ,that is the atomised diesel is injected Partially to the main combustion area that is on top of the piston and the rest is injected into the precombustion chamber which is usually a spherical chamber with an access hole ,slot or transfer port leading to the main combustion area on top of the piston .
Being a compression ignition engine as a diesel is the air inside the precombustion area reaches higher temperatures very quickly due to the relatively small area of the chamber and consuequently when the atomised fuel is introduced , will encourage a positive reaction sending an explosive CHARGE via the precombustion chamber into the main combustion area resulting in a very efficient return on the ammount of fuel used.
Worth noting is the use of a PINTLE type fuel injector which provides a non directional and very precise volume of fuel, this also aids combustion in less than favourable conditions, especially in severely cold environments.
although more popular nowadays. I still feel comparing Direct injection with Indirect that the Indirect injection diesel is more fuel efficient and has a much more usable range of power when it comes to situations where the tractor is put to task, plowing as an example.
I hope this helps and goes towards answering your question.
Regards .
Hutch
P.S.
Answer to you question precombustion caps primarilly give access to the combustion area to allow maintenance and I would say machining during manufacture, the caps are sealed as in the case of the M.F 35 with copper washers or copper gaskets, Providing the caps are checked and are flat and the washers have been anealed they will GENERALLY seal although I have fitted all new parts and they still do not seal !!!!
I have worked on a lot of engines with Indirect fuel injection and I will try to keep this explanation as short as possible.
Basically the precombustion chamber aids ignition of the diesel fuel ,that is the atomised diesel is injected Partially to the main combustion area that is on top of the piston and the rest is injected into the precombustion chamber which is usually a spherical chamber with an access hole ,slot or transfer port leading to the main combustion area on top of the piston .
Being a compression ignition engine as a diesel is the air inside the precombustion area reaches higher temperatures very quickly due to the relatively small area of the chamber and consuequently when the atomised fuel is introduced , will encourage a positive reaction sending an explosive CHARGE via the precombustion chamber into the main combustion area resulting in a very efficient return on the ammount of fuel used.
Worth noting is the use of a PINTLE type fuel injector which provides a non directional and very precise volume of fuel, this also aids combustion in less than favourable conditions, especially in severely cold environments.
although more popular nowadays. I still feel comparing Direct injection with Indirect that the Indirect injection diesel is more fuel efficient and has a much more usable range of power when it comes to situations where the tractor is put to task, plowing as an example.
I hope this helps and goes towards answering your question.
Regards .
Hutch
P.S.
Answer to you question precombustion caps primarilly give access to the combustion area to allow maintenance and I would say machining during manufacture, the caps are sealed as in the case of the M.F 35 with copper washers or copper gaskets, Providing the caps are checked and are flat and the washers have been anealed they will GENERALLY seal although I have fitted all new parts and they still do not seal !!!!
Last edited:
shona13
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G.Day Rford .
read my reply to shrievy?????????????.
Hutch.
read my reply to shrievy?????????????.
Hutch.
shona13
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- Massey Ferguson 148 .Chamberlain Super 70. Caterpillar D4. Chamberlain 354 FEL.Toro 268 rideon kubota L2002fel
G,Day Rford .
!!!!!! Simplify??.
Hutch.
!!!!!! Simplify??.
Hutch.
Yep...I'm not real sharp and when it comes to diesel engines not experienced either. Actually I was wrong in what I was thinking. Combustion caps are not the copper gaskets between the injector and the head. They are some triangular shaped cover that are next to the exhaust manifold on the indirect injection engines. They have an exhaust-type looking gasket, which is what was leaking. Here is a picture. They are the blue triangle pieces under the injectors and next to the exhaust manifold.
I've tried to attach a photo I stole off another site.
shona13
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- Massey Ferguson 148 .Chamberlain Super 70. Caterpillar D4. Chamberlain 354 FEL.Toro 268 rideon kubota L2002fel
G,Day R ford .
These are the wrong colour Massey caps are RED !!!.
Hutch.
These are the wrong colour Massey caps are RED !!!.
Hutch.
