My 998 mini engine is fitted with a Torquemaster inlet manifold (Minispares part no.C-AHT770) with a servo take off hole on the top. The take off hole had a 5/8unf plug in it which has disappeared causing the engine to stop. I'm hoping that the plug has unscrewed itself back out of the hole somehow but the question is - can the 5/8 plug, (Minispares part no. 5-8UNF) be screwed all the way through the hole & drop into the inside of the manifold. I'm not sure if the hole in the manifold is threaded all the way through, or if it tapers towards the inside. Any info would be very welcome, as it will save me having to remove the manifold to check inside!!
Missing Inlet Manifold Blanking Plug!
Started by
Mayfair_Bateson
, Nov 29 2011 10:42 PM
6 replies to this topic
#1
Mayfair_Bateson
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Stage One Kit Fitted
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Posted 29 November 2011 - 10:42 PM
#2
charliedurrant
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Posted 29 November 2011 - 10:49 PM
Hi,
What a worry. From memory I think the plug will go through. I thread locked mine and seemed to remeber that I could continue to turn it into the manifold - hence the thread lock. I'm away from it at the mo otherwise I'd check, sorry, hopefully someone else will know for sure.
Charlie
What a worry. From memory I think the plug will go through. I thread locked mine and seemed to remeber that I could continue to turn it into the manifold - hence the thread lock. I'm away from it at the mo otherwise I'd check, sorry, hopefully someone else will know for sure.
Charlie
#3
Wil_h
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Up Into Fourth
Posted 30 November 2011 - 08:18 AM
I guess it's more likely to fall in than out, but yes they go straight through, I threadlocked mine.
When you say stoped, do you mean phyiscally jammed, or just won't run?
Either way, safest bet is to whip the manifold off and have a look, easy job.
When you say stoped, do you mean phyiscally jammed, or just won't run?
Either way, safest bet is to whip the manifold off and have a look, easy job.
#4
alsy
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Speeding Along Now
Posted 30 November 2011 - 10:17 AM
This has happened to me, the screw isnt tappered.. so it MAY have fallen into the engine. (it did with me 
) youll need to take the head off.. and have a hunt in all the chambers.. seen as mine was sitting there helpless ruining the engine.. also dont plug it up with a spark plug that has eletrical tape around it and carry on driving it,. it will cost you alot more then you hoped for .
Ideally you'll want to get the head skimmed as at some point it may of been over heating and warped it, and get all the valves checked for damage.. Its quite alot of work.
) youll need to take the head off.. and have a hunt in all the chambers.. seen as mine was sitting there helpless ruining the engine.. also dont plug it up with a spark plug that has eletrical tape around it and carry on driving it,. it will cost you alot more then you hoped for . Ideally you'll want to get the head skimmed as at some point it may of been over heating and warped it, and get all the valves checked for damage.. Its quite alot of work.
#5
dklawson
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Posted 30 November 2011 - 02:37 PM
Alsy, are you saying the plug got into the bores in the block? It really, really should not have. A 5/8" diameter plug is much to large to pass through the valves unless it broke into many pieces by being beaten by the valves... or bent the valve head severely. Is that what happened to your engine/head?
Regardless, it sounds like the OP should at least pull the manifold and look to see if the plug is sitting in one of the inlet ports. Perhaps they will be lucky and be able to "pluck" the part out with forceps without there being other damage.
Regardless, it sounds like the OP should at least pull the manifold and look to see if the plug is sitting in one of the inlet ports. Perhaps they will be lucky and be able to "pluck" the part out with forceps without there being other damage.
#6
Mayfair_Bateson
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Posted 30 November 2011 - 10:17 PM
Good news! Whipped the inlet manifold off and found the plug in the inlet port in the cyl head! What a pain it was to get out!! Managed to pull it out with double sided sticky tape on my finger, got a new plug with a head on it and also loctited it in to be doubly sure it wouldn't come out again. Would advise buying the other plug off Minispares (part no. ADP210) and not using the blanking plug without a head (Minispares part no. 5-8UNF) unless using loctite! Thanks for the replies, Matt
#7
charliedurrant
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Posted 30 November 2011 - 11:22 PM
Good news! Whipped the inlet manifold off and found the plug in the inlet port in the cyl head! What a pain it was to get out!! Managed to pull it out with double sided sticky tape on my finger, got a new plug with a head on it and also loctited it in to be doubly sure it wouldn't come out again. Would advise buying the other plug off Minispares (part no. ADP210) and not using the blanking plug without a head (Minispares part no. 5-8UNF) unless using loctite! Thanks for the replies, Matt
Good to see it was all sorted. Interesting that minispares push the allen key type blanking plug and not the ADP210
see http://www.minispare...=0&tc=1#submenu and then click on the 'this kit contains' tab. I bought the allen key type aswell! I've alerted minispares to this thread.
Charlie
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