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-   -   Turbo housing; seized bolt (https://www.dieselplace.com/forum/63-gm-diesel-engines/21-6-5l-diesel-engine/973468-turbo-housing-seized-bolt.html)

jnlperformance 02-02-2019 05:38 PM

Turbo housing; seized bolt
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Any ideas?

I've already torched it. Soaked in penetration oil...

Smashed it with a wrench and hammer a few times.

Contemplating welding a donor wrench to it...or cutting it. Area is too small for vice grips.

I'm noticing the wrench flexing. Ergo me welding it to the bolt.

Can't fit the closed end around it wish I could. Would likely come off then...


Ideas? It would be preferable to get it off clean... even if I loose a tool in the process. It's easier to replace a tool vs remove a bolt with a broken head.

It's the only bolt left... one I'm pointing to with a wrench.

ak diesel drive 02-02-2019 06:03 PM

grind down the box end to make it thin enough to go over it maybe?

rude robert 02-02-2019 07:38 PM

Try and tighten it a little bit then loosen it

rude robert 02-02-2019 07:38 PM

How hot did you get it

jnlperformance 02-02-2019 08:47 PM

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I got it to about 850 degrees last night (laser temp read) tried tightening too..

I guess as I was on my way to get some goodies at the toy store (a donor 1/2in wrench, among other things) ak and I had the same idea...

A good smacking and it popped loose. Feels nasty like the threads are stripped. Been working on my 5485 and 5079 pumps in the meantime while some more oil sets in..

Back to it...

sctrailrider 02-02-2019 08:47 PM

If you get the area around it red hot it should loosen some, if not just torch the head off then separate the housing and get at it with vice grips...

jnlperformance 02-03-2019 02:13 PM

I got it off. Ak and I were on the same page there lol

I don't like torching cast items until it's red, risk of cracking at those temps.

By playing it safe I managed to save the housing :)

jnlperformance 04-11-2019 01:05 PM

turbo housing blues...
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Learned some lessons from the prior unit... did some things differently on this one. I could tell this one was going to be a bit more difficult by how the first few bolts came off on the downpipe housing. All has gone swell except for the SAME TWO BOLTS!

Tried heat, pressure, hammer, jolts. The works. Just about everything short of...

Mounting in the vice. Maybe attempting to turn the compressor housing with some carefully placed taps simultaneously with two hammers. I tried with one hammer last night out of vice. No go.

Sacrificing an open end wrench or a steel bar and welding to the bolt head. Arduously difficult to remove the donor metal to turn the bolt out without damaging the housing...

Taking sctrailriders way of it and getting at it post removal. I guess there would be enough meat left to weld a nut on and get it that way....

jnlperformance 04-11-2019 01:15 PM

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I'll definitely take some fresh ideas on those bolts ^^^ :HiHi:

Anyone know where I can get these? Just in case...

They're steel. Stainless or not I have no idea.

jnlperformance 04-11-2019 04:08 PM

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One down one to go..

jnlperformance 04-11-2019 04:56 PM

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OkDually 04-11-2019 05:12 PM

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Originally Posted by jnlperformance (Post 9813056)


jnlperformance 04-12-2019 10:18 AM

Itll be purty nice in bout 24 hours there cledus.. :hehe:

The front and rear impeller shaft seals were shot. Not to any surprise at all. Spins ok / mediocre. Hopefully itll turn out ok.

bk95td 04-13-2019 02:31 AM

I love home-made and sacrificial tools. I buy sets of cheap wrenches to have on hand just in case. I may go to buying wrenches at my local pawn shop. They have tons of them for cheap.

jnlperformance 04-13-2019 12:40 PM

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Figured I'd share some pics of what things look like when your impeller shaft seals are done.

Other signs the shaft seals are worn;
Oil in intake
oil on intake bell and upper plenum where the two connect
Oil all over the turbo... lol

Had this one been run for much longer the shaft would need to be replaced. 100 bucks right there. Ouch.

jnlperformance 04-15-2019 12:26 PM

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Well the compressor housing wasn't quite through with me yet.

The thrust bearing retainer bolts were nice and seized. Was going to try an ezout but when drilling the bolts the head just rips right off. To tiny. So I just went for it and rammed the bit in there hoping it would break them (all 4) free.

I got lucky this time.

*I think* I saved the housing... I think. I'll know here in a while.

From here the housing goes in the parts washer to clean it up. Pull out and refinish the drain surface, check those 4 bores and maybe run a tap to clean the threads up and repeat. Then paint and reassembly.

This turbo hasn't been very much fun. :coffee:

jnlperformance 04-17-2019 12:22 PM

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I did manage to save the compressor housing.

Can't say the same for the impeller shaft. Nice and cracked. Lucky it didn't snap off, and by the looks of it... wasn't too far down the road...

jnlperformance 04-21-2019 07:02 PM

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Well my new shaft made it here 4 days earlier than expected... happy about that.

Assembled and done.

Happy Easter everyone! :HiHi:

gimpyrobb 04-24-2019 11:52 AM

Now do you take it somewhere to have it spin-balanced or just put it on the truck? I worry about rebuilding a turbo and having it brake, then sucked into the motor.

jnlperformance 04-25-2019 04:31 AM

Good question...

The shaft assemblies I buy are pre balanced. You install the compressor wheel using the balance marks provided on the shaft and wheel.

(Just my opinion) I'd say the chances of it snapping had I left it alone where MUCH higher vs replacing with cheap unbalanced shaft. (judging by the massive crack in the shaft, and another I noticed later on but didn't take a pic of) but the crack in the rear of the shaft is just under halfway thru the shaft. Disaster waiting to happen... first time I have seen that...

The old shaft will spend the rest of its life on a display shelf as an example.

But I digress..

Spools great. Runs great. Turbo runs cold now :thumb:

gimpyrobb 04-25-2019 09:22 AM

Good to know that option is out there. Whats a ballpark for them pre-balanced? I have one waiting to go on a 6.2 that might get r&r-ed.

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