RP7 started my diesel - but why?
Submitted: Friday, Jul 21, 2006 at 18:46
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F4Phantom
This morning I had not started my diesel since a cold 0 degree morning. Anyway it cranked fine, plenty of battery and engine speed but it just would not start. After a very long time of continous craking and retrying it was clear something was wrong and it was never going to start. So I got the RP7 (WD40 or whatever brand) and sprayed the engine bay around the fuel system, I also sprayed into the
snorkel. Anyway, she started like a petrol engine first crank!! WHAT?? Can anyone explain in a chemical/physics sense what happened?
Thanks
Reply By: Notso - Friday, Jul 21, 2006 at 18:51
Friday, Jul 21, 2006 at 18:51
WD40 is a hydrocarbon compound, it also probably uses LP gas as a propellent. I'm too lazy to duck out to the garage to check.
AnswerID:
184701
Follow Up By: Notso - Friday, Jul 21, 2006 at 18:52
Friday, Jul 21, 2006 at 18:52
OOPs I mean RP7, same sort of stuff
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441421
Reply By: Exploder - Friday, Jul 21, 2006 at 19:04
Friday, Jul 21, 2006 at 19:04
WD40, RP7 all that stuff is the >
Same as “Start Ya basted” or Aerostart It’s a hydrocarbon
Another one I have heard was Primer “T” loctight being used> was told that one by a hydraulic fitter who used it a few times on cold mornings on
mine sites.
AnswerID:
184702
Reply By: Bros 1 - Friday, Jul 21, 2006 at 19:28
Friday, Jul 21, 2006 at 19:28
F4Phantom,
Nothing wrong with a burning rag held near intake as a last resort. (diesel)
Cheers,
Bros.
AnswerID:
184709
Follow Up By: F4Phantom - Friday, Jul 21, 2006 at 19:52
Friday, Jul 21, 2006 at 19:52
I am guessing if your glow plugs are bad this will solve that problem. I changed my plugs a year ago, i suppose they could be up for another change.
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Follow Up By: Truckster (Vic) - Friday, Jul 21, 2006 at 23:56
Friday, Jul 21, 2006 at 23:56
your glow plugs are 12 mths old, they wont need changing for another 5 years....
the GQ ones are original, and thats a 91 model
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Follow Up By: F4Phantom - Saturday, Jul 22, 2006 at 00:13
Saturday, Jul 22, 2006 at 00:13
When I put the plugs in new the engine started on a cold day first time like a petrol, now it cranks a bit which is why I was thinking they could be hammered. This post is different than just normal cranking, the thing was never ever going to start in a billion years of cranking.
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Follow Up By: G.T. - Monday, Jul 24, 2006 at 17:26
Monday, Jul 24, 2006 at 17:26
A rag which has been wetted with petrol ( not soaked or sopping ) held to the air intake will achieve the same effect. I was waiting for new glow plugs to arrive for my `94 2.5 Triton and did this in the morning each day. It started during the day with no problems after it had warmed up. My lawnmower petrol supply suffered though! Regards G.T.
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Reply By: Member - Bruce and Anne - Friday, Jul 21, 2006 at 20:33
Friday, Jul 21, 2006 at 20:33
If you have to use aero start a lot and it is not the glow plugs than you might need to talk to CEM ( Cost Effective Maintenance) there advertisers here. There product has worked for me in a marine deisel that was hard to start and would not rev out to what it should have.
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Reply By: blown4by - Friday, Jul 21, 2006 at 22:16
Friday, Jul 21, 2006 at 22:16
Many of those type of sprays that are used to free up frozen bolts, etc contain a percentage of diesel fuel so that is why the engine would have started. Straight diesel fuel free's up frozen bolts just as
well but paying a lot more for it in a pressure pack can makes us feel better. Aerostart has ether in it hence the need to use it with extreme care and only when the engine is cranking.
AnswerID:
184736
Follow Up By: pilbaradisco - Saturday, Jul 22, 2006 at 00:00
Saturday, Jul 22, 2006 at 00:00
We use a whole can of Aerostart to start the Diesel electric locomotives (GE Dash 9's, V16 4400hp) at work when they have flat batteries or after a full injector change.
Glen.
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Reply By: Aandy(WA) - Saturday, Jul 22, 2006 at 00:16
Saturday, Jul 22, 2006 at 00:16
Mechanics used diesel to do the things that wd40 et all do long before someone thought of marketing it in a user friendly spray can. That's why it helped to start your engine. Make sure you wait for the glow plugs to warm up before cranking too.
AnswerID:
184752