996 - how bad is this going to be...
#1
Rennlist Member
Thread Starter
996 - how bad is this going to be...
I am doing the chain guides over on my 996. I was pulling the oil pump housing off the front to access the bolts for the guides on bank 2. It did not want to come off. I thought it was hung up on the studs, and was as gently as possible prying it away from the block. Then.... snap - the tube on the housing that goes into the engine block around the pump drive snapped off at the first ring. now I have most of the tube and one ring in the block.
It appears to have pulled about 1/4" out.
I have not yet tried to move the broken piece. not sure how to approach this.
Any suggestions are really appreciated. This is very discouraging...
remainder of the tube in the block - ring stayed behind when it broke
oil pump housing
housing missing the broken off section.
It appears to have pulled about 1/4" out.
I have not yet tried to move the broken piece. not sure how to approach this.
Any suggestions are really appreciated. This is very discouraging...
remainder of the tube in the block - ring stayed behind when it broke
oil pump housing
housing missing the broken off section.
#3
Three Wheelin'
Sorry. That is bad. You do need to get the broken piece out from the block. I am not really sure how to go about that at this point. That pump goes on very early in the assembly so that the engagement of the drive pin and the oring seal is easily achieved. Maybe send a PM to Charles at LNE.
#5
Rennlist Member
Thread Starter
in the picture, i see the outer tube that sheared off #1, then another circle of steel #2, then the shaft that i think is the end of the IMS #3.
Is that ring #2 around the IMS a bushing? Is it a bearing? Is it actually part of the oil pump housing? Does it rotate or is it fixed? its not clear from any images i can find.
Is that ring #2 around the IMS a bushing? Is it a bearing? Is it actually part of the oil pump housing? Does it rotate or is it fixed? its not clear from any images i can find.
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#8
Rennlist Member
This is the thickness you have to work with, it is the same as the piece that is still in the block.....
Drill two small holes carefully in the remaining piece to screw in two small sheet metal screws to use a dent puller to yank the piece out...
Drill very straight and right in the middle because if you wander off you will damage the case or the IM Shaft...
Good luck and may the Porsche Gods be with you !!
Drill two small holes carefully in the remaining piece to screw in two small sheet metal screws to use a dent puller to yank the piece out...
Drill very straight and right in the middle because if you wander off you will damage the case or the IM Shaft...
Good luck and may the Porsche Gods be with you !!
The following 2 users liked this post by Porschetech3:
996love (08-13-2024),
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#9
Rennlist Member
Thread Starter
Porschetecc3 x thanks for the idea. Scarry to drill so close to the case. Might be my only hope. As it is so stuck as to break i wonder if it will work. .
#11
Burning Brakes
could you turn a jig that aligns with id of the shaft with drill guides for the screws used to pull part out? Pig that makes sense to you…
#12
Rennlist Member
It won't be that hard to get out, as porschetech said drill two holes the last one I did I tapped the two holes and used 4MM bolts with a horseshoe bracket that I made out of flat stock to remove the broken piece. Make sure you remove the tensioner to release any pressure on the intermediate shaft.
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#13
Rennlist Member
Thread Starter
Thanks all. Encouraging to hear that I am not the only one this happened to. I had not released the tensioner on the IMS. That is the lessons learned here I think.
Getting pieces together to tap and pull this.
Getting pieces together to tap and pull this.
#14
Rennlist Member
Thread Starter
Success. The process-
i filed down the ridge of the broken area to get a flat surface to drill in to
i then Drilled two holes and tapped them for 4mm bolts.
i took a piece of flat bar and made a “u” and tried backing the piece out with nuts on the bolts. No joy. The threads are not strong enough.
so I used a piece of square tube and some other scraps to allow me to use a gear puller to puller the “u”. That worked and it slowly came out.
lessons learned -
cheapest new pump i can dfifnd is under $400. Which it were less, but on careful inspection of the pump I find wear. I had low oil pressure at idle - about 1.25 bars- so maybe a new one will help. I already put in the 997 relief valve.
so another adventure behind me….
thanks for the advice.
i filed down the ridge of the broken area to get a flat surface to drill in to
i then Drilled two holes and tapped them for 4mm bolts.
i took a piece of flat bar and made a “u” and tried backing the piece out with nuts on the bolts. No joy. The threads are not strong enough.
so I used a piece of square tube and some other scraps to allow me to use a gear puller to puller the “u”. That worked and it slowly came out.
lessons learned -
- Before when taking the oil pump housing off, release all the chain tensioners first. This is why ithink it was so hard to remove.
- After all the bolts are out try rotating the housing around the tube to loosen it as you pullit off. Come out straight!
- be very careful in how deep you drill. One of mine went through.
be very careful to go in the center of the remaining piece. One of mine wandered off and i have a slight scratch in the case.
cheapest new pump i can dfifnd is under $400. Which it were less, but on careful inspection of the pump I find wear. I had low oil pressure at idle - about 1.25 bars- so maybe a new one will help. I already put in the 997 relief valve.
so another adventure behind me….
thanks for the advice.
The following 6 users liked this post by jdsculler:
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