[Wanted] 740 throttle body/seal

Flixtez

Hi All, just did a smoke test on my 740 turbo and have a fair amount of smoke coming out from the throttle body where the spring is (similar to picture below)

Can this be pulled apart and resealed or do I need a new one?

Image description

Major Ledfoot

Flixtez These units can be dismantled and repaired.

You may find the seal in there has perished. The seal is the same part number and item as a engine valve husher.

Check out the 740 parts books in the Oz Volvo Tech Archive which has exploded diagrams of the throttle body.

Brad

There is a seal located behind the spring in your photo. They fall apart due to age and heat like most other seals. Easy job to replace it. You will need to remove that nut and spindle, then the spring to access the seal. Take note of how the spring is oriented. The throttle switch needs to be removed from the opposite end too if I remember correctly. Obviously you will need to reset the position of the throttle switch upon reassembly.

This is the seal:

https://www.fcpeuro.com/products/volvo-throttle-sealing-ring-genuine-volvo-419568

Flixtez

Brad

Major Ledfoot

Thanks that is great to know, I'll pick up one of the seals, and cheers for updating the post for me, happy to rebuild with a seal 🙂

Anthony

Major Ledfoot

Brilliant, yes your right on the husher and the throttle body seal. Learn something every day, thank you.

Major Ledfoot

@Flixtez PS - I've moved your post into [Workshop] [Troubleshooting] since I'm pretty sure you're not gonna want a 25+ year old used rubber seal.

Anthony

@Flixtez you might need two seals (hushers) one for each end of the shaft.
Give the throttle body a thorough clean and a tiny bit of oil on the shaft /bush area.

jamesinc

@Flixtez I'm pretty sure I have spares of this seal, I'm happy to post you one for $10, let me know if interested and I'll check, but I'm like... 95% sure I have at least one, probably half a dozen.

Flixtez

jamesinc

That would be amazing, i'll private message you

Flixtez

To conclude this thread I want to say a huge thank you to @jamesinc for his help getting the right seal.

There is one seal on the spring side of the throttle body with this part number: 3154432 and a small o ring on the tps which we were able to replace with one from a set of universal sizes, fits snugly against the tps.

No more leaks!

Thanks for all the help

Major Ledfoot

Flixtez 3154432

3514432

Flixtez

Major Ledfoot oh shoot, misread it haha, thats the one