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> Rebuilding Throttle Bodies, New service. No more sticky throttle!
Bartlett 914
post Jul 19 2017, 07:32 PM
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QUOTE(euro911 @ Jul 19 2017, 08:06 PM) *

QUOTE(Bartlett 914 @ Jul 19 2017, 07:44 AM) *
Hi Mark

That look really nice. I realized more people are going to expect a better finish that what I pictured. My camera does seem to make things look worse than they are. I have started to glass bead blast the parts. They are looking better. I am also replacing the nut with a silver colored zinc plated nut. I am also replacing the 2 washers with Stainless steel ones. These are also silver but will never corrode and are very smooth. I am looking into plating.
Need to be vigilant with thorough cleaning when bead blasting anything that will introduce particles into a motor's internals. Glass beads will destroy a motor's internals.

May I suggest soda blasting as Mark has done? I've seen motors destroyed due to captured, then dislodged glass beads.

I too was concerned about this. I also have soda blasting and it did an OK job. I am bead blasting the steel parts. The bodies I have blasted are followed up with a real cleaning with soap and water. I am sure they are clean
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Mark Henry
post Jul 19 2017, 07:56 PM
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Pine-sol will do a real good job cleaning the bare AL casting.
But it strips the finish off of plated parts and discolors brass.


http://www.914world.com/bbs2/index.php?showtopic=109676
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euro911
post Jul 20 2017, 02:05 AM
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QUOTE(Bartlett 914 @ Jul 19 2017, 06:32 PM) *
QUOTE(euro911 @ Jul 19 2017, 08:06 PM) *
Need to be vigilant with thorough cleaning when bead blasting anything that will introduce particles into a motor's internals. Glass beads will destroy a motor's internals.

May I suggest soda blasting as Mark has done? I've seen motors destroyed due to captured, then dislodged glass beads.
I too was concerned about this. I also have soda blasting and it did an OK job. I am bead blasting the steel parts. The bodies I have blasted are followed up with a real cleaning with soap and water. I am sure they are clean
Maybe a shake session in an ultrasonic tank (HF sells an fairly inexpensive one) would dislodge any captured beads?
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Bartlett 914
post Jul 20 2017, 07:02 AM
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QUOTE(euro911 @ Jul 20 2017, 03:05 AM) *

QUOTE(Bartlett 914 @ Jul 19 2017, 06:32 PM) *
QUOTE(euro911 @ Jul 19 2017, 08:06 PM) *
Need to be vigilant with thorough cleaning when bead blasting anything that will introduce particles into a motor's internals. Glass beads will destroy a motor's internals.

May I suggest soda blasting as Mark has done? I've seen motors destroyed due to captured, then dislodged glass beads.
I too was concerned about this. I also have soda blasting and it did an OK job. I am bead blasting the steel parts. The bodies I have blasted are followed up with a real cleaning with soap and water. I am sure they are clean
Maybe a shake session in an ultrasonic tank (HF sells an fairly inexpensive one) would dislodge any captured beads?

Good Idea. I have an expensive one. I will see if it fits
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Bartlett 914
post Jul 20 2017, 07:03 AM
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QUOTE(Mark Henry @ Jul 19 2017, 08:56 PM) *

Pine-sol will do a real good job cleaning the bare AL casting.
But it strips the finish off of plated parts and discolors brass.


http://www.914world.com/bbs2/index.php?showtopic=109676

I remember seeing this awhile back. I had forgotten about it. Thanks for the reminder.
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Dave_Darling
post Jul 20 2017, 11:35 AM
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Walnut-shell blasting is popular for cleaning ports of coking found in modern DFI-equipped engines. Some BMW and MINI models, in particular, seem to need this periodically. The blasting is done without disassembling the motor, so presumably the walnut material is harmless if it gets into the combustion chamber.

At least worth thinking about.

--DD
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solex
post Jul 25 2017, 06:52 AM
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Mark,
I'm in and sent you a message and picture of my current throttle body on Sunday, any idea on the ETA?

Thanks,
Dan
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Shadowfax
post Jul 28 2017, 06:31 AM
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Bump for a great service. Installed my refurbished TB yesterday. Thanks again for offering this (IMG:style_emoticons/default/beerchug.gif)
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solex
post Jul 28 2017, 06:59 AM
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I shadow, Shadowfax's sentiments..

I received mine last night and will install this weekend and report back.
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Bartlett 914
post Jul 28 2017, 05:24 PM
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QUOTE(Shadowfax @ Jul 28 2017, 06:31 AM) *

Bump for a great service. Installed my refurbished TB yesterday. Thanks again for offering this (IMG:style_emoticons/default/beerchug.gif)

Glad you got it OK.. Thanks for the feedback

I am running into a busy schedule so repairs may be on hold until my work schedules clears.
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solex
post Jul 29 2017, 12:03 PM
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Installed the TB today set the TPS, Dwell and Idle.

Now I have to get used to not expecting the throttle initially sticking.

Thanks Mark

New bronze bushing
Attached Image

My attempt to grease the original throttle shaft a while ago
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Top shot of the new throttle body
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Bartlett 914
post Jul 29 2017, 12:32 PM
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I am glad you like it!
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euro911
post Jul 29 2017, 02:21 PM
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QUOTE(solex @ Jul 29 2017, 11:03 AM) *
Installed the TB today set the TPS, Dwell and Idle.

Now I have to get used to not expecting the throttle initially sticking. ...
Is that like remembering exactly where there's a scratch in a song on vinyl LP album?

... (IMG:http://www.914world.com/bbs2/uploads_offsite/media.giphy.com-7300-1501359711.1.gif)
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larryM
post Jul 29 2017, 10:09 PM
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how about adding an overbore option like Ed Mazula used to do?

it makes a great midrange boost on a 2.0 type 4

apparently his biz is no longer - bigborethrottlebodies.com
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McMark
post Sep 12 2017, 10:43 AM
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Got mine back a little while ago and finally took pictures. This'll be going on my 1.7 Turbo engine when I have time for that. I thought the part I sent in was in great shape. I didn't even think it really needed rebuilding...but what I got back was even better. (IMG:style_emoticons/default/drooley.gif)

Bottom line is that pretty much everyone needs this service. (IMG:style_emoticons/default/beerchug.gif)


Pictures- I sent my own parts for zinc plating, and the TPS is for my MicroSquirt setup.


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sdthomas
post Sep 25 2017, 12:28 PM
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Mark are you still offering this service? Sent you a PM but haven't heard back.

-Shawn
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mdalcorn
post Sep 16 2022, 03:50 PM
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QUOTE(Bartlett 914 @ Jul 17 2017, 06:22 PM) *

Recently I got tired of my sticky uneven throttle body. I was stuck in construction traffic and inching forward became almost impossible. I decided to repair mine. The throttle body shaft has no bearing. It is steel against aluminum. In time the round hole becomes an oval one. This makes the throttle plate operate erratically. It even sticks when in the closed position.

I made a setup in my machine shop to repair these. I accurately locate the shaft hole and boar it to fit an oilite bushing. I have done a dozen of these so far. In my car, the difference was incredible. I expected the operation off idle to be improved which it did but I also found the operation was smoother through the operating range.

I decided I could offer this as a service. In this, I will clean the body and install the new bushings. This operation requires special machining in order to keep things aligned properly. At this point, I am not plating anything. I am only cleaning the steel components. I may offer plated parts later but not at this time. I will need a core in exchange for one I send out or I can repair yours but there will be a delay in doing this. There are some that have 2 ports and some with only one. Some have a built in return spring and the other does not. You can see the differences in the ones pictured.

If you are interested in this service, My starting price is $125.00 plus shipping





Do you still offer this service? Thank you.
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StarBear
post Sep 16 2022, 04:03 PM
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Ditto?
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TJB/914
post Sep 16 2022, 04:31 PM
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(IMG:style_emoticons/default/smile.gif)
Mark rebuilt my throttle body this summer. (IMG:style_emoticons/default/first.gif)
Quick turnaround and very reasonable price (IMG:style_emoticons/default/pray.gif) .

After installing Mark's rebuild it eliminated my annoying high idle and now it's perfect @ about 900-RPM

Tom Highly recommended & good guy.


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TJB/914
post Sep 16 2022, 04:38 PM
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QUOTE(TJB/914 @ Sep 16 2022, 06:31 PM) *

(IMG:style_emoticons/default/smile.gif)
Mark rebuilt my throttle body this summer. (IMG:style_emoticons/default/first.gif)
Quick turnaround and very reasonable price (IMG:style_emoticons/default/pray.gif) .

After installing Mark's rebuild it eliminated my annoying high idle and now it's perfect @ about 900-RPM

Tom Highly recommended & good guy.


Sorry Mark
Those are the original photo's & I don't have a finished photo, but it was excellent workmanship (IMG:style_emoticons/default/first.gif)
Tom


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