Referb injectors

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Patrick98
Posts: 49
Joined: Thu Aug 02, 2018 7:44 pm
Location: Bt344st

Referb injectors

Post by Patrick98 » Fri Mar 15, 2019 7:45 pm

Hello again.. I had a few questions in the past relating to starting issues that I have with the DB 996. I just want to tell you all that I was going to compression test on the 996 but the compression test kit that I had didn't have the correct adapter for the injector holes.. I'll keep you updated on that matter for those who gave me advance on the previous questions.
I have reconditioned injectors ready to be put in after I compression test it and assemble the coolant system.. the question I have is when I'm putting the 'new' injectors back in should I lightly coat them in engine oil to help them slid down the injector hole for I had noticed a skinning of oil on the old injectors as I was taking them out and I don't know of that should be there or not! Any advice?? Thanks

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db2d
Posts: 2063
Joined: Fri Feb 24, 2012 10:01 pm
Location: Monmouthshire

Re: Referb injectors

Post by db2d » Fri Mar 15, 2019 11:06 pm

The most important thing is to be certain that the bores and seats are absolutely clean. If any combustion gases are leaking past the injectors carbon buildup occurs, making injector removal difficult. There is nothing to be gained by oiling the injectors in the long term, they are a loose fit in the bores. The copper sealing washers must be in good condition and can be annealed if necessary.

Patrick98
Posts: 49
Joined: Thu Aug 02, 2018 7:44 pm
Location: Bt344st

Re: Referb injectors

Post by Patrick98 » Sat Mar 16, 2019 9:31 am

The old injectors had carbon build on the tip but I don't no how long they were in there?? One injector was fairly hard to take out! The other two slid out handy enough.

Gard
Posts: 237
Joined: Sun Apr 06, 2008 2:25 pm
Location: Fairfax Vermont USA

Re: Referb injectors

Post by Gard » Thu Mar 21, 2019 1:36 pm

I understand the need to have the bores clean but wonder if a very light coat of grease will keep rust off the injector or bore?

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PoppyShan885
Posts: 64
Joined: Tue Oct 02, 2018 12:48 pm
Location: Southern Indiana, USA

Re: Referb injectors

Post by PoppyShan885 » Thu Mar 21, 2019 3:53 pm

Patrick98 wrote:
Sat Mar 16, 2019 9:31 am
The old injectors had carbon build on the tip but I don't no how long they were in there?? One injector was fairly hard to take out! The other two slid out handy enough.
So...did you not remove the fourth injector? If not, why?

Patrick98
Posts: 49
Joined: Thu Aug 02, 2018 7:44 pm
Location: Bt344st

Re: Referb injectors

Post by Patrick98 » Fri Mar 22, 2019 6:54 pm

Sorry for not being clear there.. I took the forth out, eventually.. took a bit of work.. again they all had a skinning of oil around them.

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