Have I overtightened the oil pump bolt (TD5)?

[turbopsi]

Hi All,

I'm working down the list of preventative maintenance jobs as found on this forum and today's job was the famous oil pump bolt. I still feel like a total newbie every time I work on the disco and I need some reassurance I haven't overtightened the new oil pump bolt.

The old bolt was nice and tight with a good coating of factory thread lock. Either we scored a good one from factory or the job had been done before but not documented. (2001 220,000Kms)
It wasn't a fun job to get to the bolt but I guess it's about peace of mind knowing the engine was safe.

I sprayed the bolt hole with carb cleaner then used ear buds and compressed air to finish the clean. I also applied a nice smear of Loctite 243 on a brand new genuine bolt which already had some factory Loctite.

Set the torque wrench to 27nm instead of the 25nm in the manual. Tightened to the 27nm click and went a little more.

I'm now worried I've overtightened?:( I can still get solid clicks out of the torque wrench set at 27nm if I re-check the torque.

I was paranoid about not having the bolt done, but now I'm more paranoid about my work.

Will it be ok? Sump goes back on tomorrow.

Cheers Tony

[robbotd5]

Mate, relax, it will be fine, I could not get my 1/2" drive torque wrench on to the bolt so I tightened it until the engine started to turn over. That was 2 years ago.
Regards
Robbo

[Jezzaol]

Mate, I did mine today too, Mine was loose and and I replaced the bolt and did it up exactly the same as you, so if yours fails so will mine!!! I think it will be fine.
Cheers
Jeremy

[turbopsi]

Mate, relax, it will be fine, I could not get my 1/2" drive torque wrench on to the bolt so I tightened it until the engine started to turn over. That was 2 years ago.
Regards
Robbo

Thanks Robbo, I did manage to get my 1/2 inch torque wrench in there which made easy to over-tighten. I think I may have gone a little too far past the engine starting to turn over and thought I felt it turn slightly without the gear turning over? It that possible?

I'm contemplating removing the bolt before the loctite has cured and refit a new one or the orginal with new loctite in the morning, unless I get talked out of it.

[Gaudough]

Mate, relax, it will be fine, I could not get my 1/2" drive torque wrench on to the bolt so I tightened it until the engine started to turn over. That was 2 years ago.
Regards
Robbo

I used the same method of torque wrench, started to turn the motor so its probably tight enough. Whatever you do, don't re-torque it after the loctite has been applied for a few mins. It may have set and you will make things worse by breaking the bond checking if its tight.

[turbopsi]

Mate, I did mine today too, Mine was loose and and I replaced the bolt and did it up exactly the same as you, so if yours fails so will mine!!! I think it will be fine.
Cheers
Jeremy

Thanks Jeremy, Just a little worried as I reckon I may have felt it rotated that extra little bit without the gear moving.

Saying that, I'm still able to get reliable clicks on the torque wrench at 27nm which tells me it's nice and tight.

I guess the post below has me a little worried. He was told his bolt failed due to being overtightened. As always I found it after the fact.


http://www.aulro.com/afvb/discovery-2/135177-check-your-oil-bolt-3.html

[bob10]

Hi All,

The old bolt was nice and tight with a good coating of factory thread lock. Either we scored a good one from factory or the job had been done before but not documented. (2001 220,000Kms)




Cheers Tony

For goodness sake, if after 220,000 km's, nothing has happened, leave the bolt alone. Stop listening to the naysayers, stop being paranoid, it's all good, Bob

[John W]

Your not alone. Had a go at my one last winter. Turned out the bolt was in good and proper but changed it anyway. Have a small enough torque wrench to get in there to do the new one up to spec. So probably the whole exercise was a total waste of time but with all the postings about loose bolts what choice do you have if you want to take your disco out bush.

[Blknight.aus]

your fine, I no longer go out of my way to check them but if I have to take the sump off for any reason even if its documented as done I do it anway

[djam1]

Some have failed at over 300 thousand Km so it is probably wise to check them.
That said I agree with Bob Land Rover owners do get a bit neurotic sometimes


For goodness sake, if after 220,000 km's, nothing has happened, leave the bolt alone. Stop listening to the naysayers, stop being paranoid, it's all good, Bob

[twr7cx]

For goodness sake, if after 220,000 km's, nothing has happened, leave the bolt alone. Stop listening to the naysayers, stop being paranoid, it's all good, Bob

This has been my line of thought on the bolt. My engine is at 190,000km and being a 2003 model, I haven't bothered checking the bolt. I'll do it if I ever have to take the sump off for something else.

[Jezzaol]

Mine has done 280k and it lost oil presure last week, undid the sump and bolt is about to fall out !!

Engine Expensive........ Bolt $2.00 and a couple of hours to check ! Sounds like good insurance to me!

I must have been living under a rock, as I had not read about the problem until I lost Oil pressure!

[Ollie]

I did my 2001 Td5 at 100k the bolt was tight but did not have Loctite.
There are three points
1/ Do I check the bolt or not if you need to ask the question check it, for your own sanity, Whether it is tight with or with out Loctite or loose is irreverent. Checking the sump of a ten yr old vehicle was enough for me.
2/ Use a good quality torque wrench tighten a bolt into a nut in a vice get a feel for it
3/ Trust the torque wrench setting the arm is usually two or three times the length of a std ratchet it does not feel tight.
I use a torque wrench to stop me over tightening bolts if you increase the spec' or tighten beyond the click why use the torque wrench?
If you think you over stressed the bolt then replace it - It's your head and sanity.
If you get someone else tell you it is Ok and it fails, having someone else to blame doesn't pay the bill

[turbopsi]

I did my 2001 Td5 at 100k the bolt was tight but did not have Loctite.
There are three points
1/ Do I check the bolt or not if you need to ask the question check it, for your own sanity, Whether it is tight with or with out Loctite or loose is irreverent. Checking the sump of a ten yr old vehicle was enough for me.
2/ Use a good quality torque wrench tighten a bolt into a nut in a vice get a feel for it
3/ Trust the torque wrench setting the arm is usually two or three times the length of a std ratchet it does not feel tight.
I use a torque wrench to stop me over tightening bolts if you increase the spec' or tighten beyond the click why use the torque wrench?
If you think you over stressed the bolt then replace it - It's your head and sanity.
If you get someone else tell you it is Ok and it fails, having someone else to blame doesn't pay the bill

Thanks Ollie,

I ended up replacing the bolt.