HELP ....

[Guest]

My dear old Perkins 4-99 has a Glow plug cold start insert in the air-intake that has a diesel feed to it. When energised the valve allows a small drip of diesel onto the glow element and it 'catches fire' - this flame gest sucked into the engine and away it goes ! Sounds 'orrible ... but true and works a treat ..... till the valve got blocked !

The previous owner never fitted the diesel reservoir to use it and disconnected the wiring. So I temporarily fitted a piece of 3/8 plastic pipe to the inlet stem and filled it with diesel. Connected the wires to a switch and presto it worked.... until I left the switch ON and the plug got too hot, melted the pipe and a bit of of plastic got stuck in the valve. Now it glows but no fuel goes through !!!!!

Has anyone any idea how I can remove the blockage ? I've tried to remove with a pin etc. but no luck. The plug cannot be dismantled etc. etc. only removed intact from the intake.

has anyone a glow plug of this type spare / lieing around their garage / workshop that I could have ??

Finally can anyone give me a diesel engine wiring diagram based on an average set-up ...... twin battery, alternator charged via 1-B-2-Off switch .... as the prat who wired mine up has the Alternator light permanently aglow !!!!

 

[dickh]

Sorry, can't help regarding the glow plug problem but for the wiring diagram go to www.adverc.com - they do battery controllers and I'm sure they show 2 or 3 wiring diagram.


dickh
I'd rather be sailing...

 

[vyv_cox]

Dissolve it out

Depends upon the type of tubing but few will resist acetone for long. Cellulose thinners is a mixture of solvents that probably contains various acetates and toluene. This may be the best that can be purchased for this job by the amateur. I thought you were laboratory-based, Nigel. Can you get something a little stronger?

 

[Guest]

Re: Dissolve it out

I've tried all sorts of 'crap' to get it out, but the plastic actually got that hot that it literally carbonised !!!!

I will try some 'orrible potions in my arsenal, but was reluctant to do it as I do not want to corrode / attack the element !!

The plastic in question is standard blue-clear garden variety 3/8 pipe. So the solvent will work, but also I would assume that the valve must be operating to allow the solvent to 'pass through' .... which now brings us to a delicate situation ..... the glow plug gets bl--- hot to activate the valve ... so literally could cause a small fire with the solvent !

 

[hutch]

Adverc wiring diagrams are v. basic and don't show the wiring for the alternator charging light. Suggest try contacting Sabre Engines whom I have found very helpful in the past. They provided me with the engine wiring diagram for a 4.236M.

 

[aztec]

you can get a new one from lucas, it's called a thermostart, i remember these fitted to markhandler forklifts fitted with perkins engines. as i recall these were fitted with a diesel supply straight from the lift pump and only opened when hot, when working it works a treat. hope this helps.

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[Guest]

It works absolutely great .... OK some are a little frightened that it oftens ignites the fuel with a loud POP and smoke trickles out of the air-intake ..... but I can say that the engine for many years was started on Easy-start and I thought and many agreed - including engineers that probably it would need ES for the rest of its life .... but no, a dribble of diesel onto the plug and it fired up first turn ! Amazing.

Now all I have to do is get the old one clear of the plastic or buy another one !! My 4-99 is the older type that has feed from a small reservoir supposed to 7 - 12" above the intake. Later models were fed from the 'return-line' to the tank.

I fitted a length of 3/8 plastic pipe to act as the reservoir ... fine till I left the plug on for over an hour !!! melted the pipe and blocked the minute valve hole !!!!!

Anyway - thanks all.