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General Information => Troubleshooting => Topic started by: Powered by Spearco on February 10, 2008, 05:07:06 pm

Title: Fuel coming from LDA vent, is this normal?
Post by: Powered by Spearco on February 10, 2008, 05:07:06 pm

I just finally got the chance to change the NA pump to the Turbo pump. I changed the distributor head seal and the ones at the back (cold start).
Set the timming to 1.05mm, using 155bar injectors, and that old school spearco turbo setup. It starts and runs fine but when looking under the hood after a hard run I see fuel at the LDA vent and it sprays all over my clean engine and new hoses. So I pulled the top off to check where the boost pin was at and to diag. the fuel leak, there was fuel in the top section of the LDA. Is this normal or not.
I tried to do a search for such problems but no sutch luck. I know I've seen something about it, just can't find it.
Anyone know whats going on? Is it another seal?
 Thanks, Josh

Title: Fuel coming from LDA vent, is this normal?
Post by: Powered by Spearco on February 10, 2008, 08:07:33 pm

Thanks Libby, I've never done that one before either.
I've got all the seals in the kit, but which one. :oops:  :roll:
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00335.jpg)
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00334.jpg)
Is there also some place here to find the procedure for that one.

Title: Fuel coming from LDA vent, is this normal?
Post by: fatmobile on February 11, 2008, 12:44:46 am

Yeah, search using libbybapa's name.
 He explains how to press the shaft through and maybe upgrade with bolts if yours doesn't have them.

Title: Fuel coming from LDA vent, is this normal?
Post by: Op-Ivy on February 11, 2008, 01:32:34 am

Take the pump LDA apart and compare the seals. Keep in mind the old one will most likely be a little smaller than the new.

Title: Fuel coming from LDA vent, is this normal?
Post by: Tintin on February 11, 2008, 07:49:50 am

I see the LDA seal in your bag, it is of green color in the center behind the copper washer....  anyway, It's the smallest green o-ring in your bag.

Title: Fuel coming from LDA vent, is this normal?
Post by: Powered by Spearco on February 11, 2008, 08:04:47 pm

Ok, I think I've found what and where your talking about.
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00339.jpg)
And I think that I have the screw type plugs for accessing the rod?
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00337.jpg)
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00336.jpg)
Also, is this another access for removing the hex allen key to replace the seal.
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00338.jpg)

Title: Fuel coming from LDA vent, is this normal?
Post by: Powered by Spearco on February 11, 2008, 08:22:24 pm

Thanks Libby. I'll keep posted on how it turns out. :)

Title: Fuel coming from LDA vent, is this normal?
Post by: Powered by Spearco on February 12, 2008, 09:14:11 pm

Pics of seal replacement.
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00343.jpg)
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00342.jpg)
List of peices dissasembled in order.
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00340.jpg)
Comparison of new and old seal on shaft.
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00347.jpg)
Placement of new seal.
(http://i232.photobucket.com/albums/ee10/joshmarstall/DSC00348.jpg)
Assembly is opposite.
Let me know what you think?

Title: Fuel coming from LDA vent, is this normal?
Post by: andrew.zbyrko on December 15, 2008, 06:24:40 am

I have one questions;
could you tell me size of the oring? diameter inside and outside.

Title: Fuel coming from LDA vent, is this normal?
Post by: zukgod1 on December 15, 2008, 09:08:03 am

Looks good to me aside from all the grit on the out side of the pump.

Sure would suck to get that in the pump and ruin everything down stream.

Title: Fuel coming from LDA vent, is this normal?
Post by: Smokey Eddy on December 15, 2008, 01:36:13 pm

Yes! Be very careful to keep everything really really clean. Injection shops are like an operating room, operating suits, fancy air cleaning system and so on.

Title: Fuel coming from LDA vent, is this normal?
Post by: andrew.zbyrko on December 15, 2008, 03:48:42 pm

I know about this, i have behind repair all pomp VE.
i dont now, the oring in LDA must be orginal Bosch, or I can used universal oring?
I now i can remove old oring and measure, but then I havent car to go to the shop....

[sory for my english]