Injector hold down bolt

[Wighty]

Ah well he's answered my question so hopefully he's not to bothered

Who knows what he does on weekends behind closed doors . If you mention another member and want them notified that they have been mentioned in a post , start with the @ symbol and then start typing their name , which brings up a list of members , then click on their name and hey presto @Gary007

 

[alexanderfoti]

I've been called worse!

 

[Kev555]

https://www.google.co.uk/url?sa=t&r...Timesert.pdf&usg=AOvVaw2jKECfa-On_4fPW4WX0kMn

Link here with plenty of info on timeserts Gary

 

[Gary007]

Hello again so just an update to were I am with the van I bought the 6m timesert thread repair kit from eBay so with the rocker cover of I drilled counterbored and taped the hole but the conterbore tool would not cut into the metal so I carried on with inserting the 6mx 9m timesert down into the hole turned the tool until tight and then slack it stayed in but I didn't feel it was right but I carried on with the job put it back together and on tightening the bolt it just went tight and then slack so I'm now thinking of getting this from eBay has anybody used these before and what are your views thanks again everybody

 

[Gary007]

If the bolts don't tighten then the threads are probably stripped. The rocker cover needs to come off and the holes drilled out and the thread repaired (timesert is my preferred method)

If the bolts don't tighten then the threads are probably stripped. The rocker cover needs to come off and the holes drilled out and the thread repaired (timesert is my preferred method)

Hi alexanderfoti think I got your name right this timesorry for that just wanted to ask you about my van and the problem I'm having I bought the wurth timesert kit from eBay but to cut a long story it didn't work for me the boring tool didn't seem to cut into the metal so I fitted the 6m timsert down in the hole but on tightening the bolt it wouldn't York up so I'm now thinking of buying one of these from e bay just wanted to know your thoughts thanks best regards gary

 

[DaffyF]

I realise this is an old thread but I've got stripped injector bolt threads and was wondering if anybody has tried this kit and has any opinions on it.

Injector Clamping Bolt Thread Repair Compatible with Mercedes 10pcs : Amazon.co.uk: Automotive

Buy Injector Clamping Bolt Thread Repair Compatible with Mercedes 10pcs at Amazon UK. Free delivery on eligible orders.

www.amazon.co.uk

 

[Kev555]

I think from memory Daffy, time-serts are the best option for this job. That looks like cheap junk to me. Its one job worth doing right as its a head off job or worse if you balls up the timesert job. Good quality stuff should look like the below link prices

https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiBov3G8OzzAhVioVwKHVyeDKYQFnoECAMQAQ&url=https%3A%2F%2Fwww.amazon.co.uk%2FTIME-SERT-M6x1-0-thread-repair-1610%2Fdp%2FB00NWWGB5G&usg=AOvVaw2wZ7car3u0RN4okRsnCx2l

Time-Sert Thread Repair Kit M6 | eBay

Wurth Time Sert Thread Repair Kit M6. <br>Condition is New. Dispatched with Royal Mail Signed For® 2nd Class.

www.ebay.co.uk

 

[DaffyF]

Thanks for you input Kev555, much appreciated.
I think I get you. This is one where I don't want to skimp on cost but there are others made by Laser 6958 and Sealey VS640 that are £100ish that look identical. I was only considering these so I don't have to strip off the valve cover and just do the two injectors that are blowing.

 

[Kev555]

The ones by Laser & Sealy should be good enough quality Daffy, its really all about the quality of the time serts themselves not the tools that come along with them although quality tools do make a job like this a lot easier too.

 

[Steve@Avantgarde]

The injector clamp requires a stretch bolt to prevent it loosening when under thermal heat from the engine. A time sert with a steel tensile bolt will not hold the injector to the correct torque and at some point it will depart the cylinder if used. Trust me.

I wrote a thread on here a few years ago explaining why a tensile steel bolt cannot and should not be used.

 

[DaffyF]

Thank you gentleman for your feedback.
Steve, I have read your post on the subject and found it very informative as I'm sure most people did. And without I doubt if I was doing
all five injectors then I would go down the Timesert route, but I'm a more "if it aint broke, don't fix it" kind of guy.
I do have another question for the technically minded. What I have noticed with the Timesert and helicoil installations, with both of these methods the insert is installed at the top of the hole, but with the type I'm looking at, they are installed in the bottom.

I was wondering how this would effect the torquing of the bolt or it's holding properties. If at all.

 

[Mark A]

When I did the timesert fix on our old W163 it was at the bottom of the hole with a new stretch bolt.

 

[DaffyF]

Oh, ok. I thought there was a tool in the timesert kit to kind of chamfer around the top to stop the insert going in too far. Can I ask how long it has held for.
The Helicoil fixes I've watched seem to recommend 1/4 to 1/2 a thread below the top.

 

[EmilysDad]

Oh, ok. I thought there was a tool in the timesert kit to kind of chamfer around the top to stop the insert going in too far. ....

All the Timeserts I've used have had, there's even a tool in the set to give a slight counterbore to the drilled hole.

 

[DaffyF]

Maybe Timesert make different types of insert.
I can see how Helicoils can go deeper.

 

[Mark A]

Details are in one of my previous posts maybe about 7 or 8 yrs ago.

Drilled out top of hole to take timesert down to near bottom of hole (about 15mm) then used the kit drill bit and tap. Didn’t need to do the countersink as I wasn’t looking to have the top flush. It was still holding when we got rid 3 yrs later. a local garage tried to repair previously but it never held for more than 6mnths

 

[DaffyF]

I see. So I can assume then that it's OK to put the laser inserts deep done. I've decided to go with the laser option.

 

[Mark A]

Never tried them but can’t see why not.

Measure, measure, measure again, don’t go any deeper than the existing hole as there’s not much meat below. As long as you get the new thread near the bottom of the existing hole, the stretch bolt should do it’s job.

Make sure you get all of the crud out of the bottom of the hole as you can damage things further by compressing it.

 

[DaffyF]

Understood, thanks Mark A. I havn't read anywhere that anyone has actually measured the clearance at the bottom of the bolt. I assume it's different between models.

 

[Kev555]

I see you've fell into the right hands here on advice Daffy, Forgot to mention what Steve said above that its critical to use the correct stretch bolts. Enjoy the sweating moment while pulling the last 90 degrees. make sure you've got the right torque setting for the bolt diameter as I got conflicting info for mine on the web and nearly applied the wrong torque if it wasn't for the guys on the forum here. Think its still 7nm +90 +90 for most injectors with stretch bolts but Confirm it with Steve@avantegarde for your engine.