AQ130D Tube on Cylinder Head

[74bayliner]

Hi so My AQ130D engine had a bad head a while back so i went to canada and got a replacement from the correct engine that is the automotive alternate for my engine... The head was identical to the marine one except for two things... the Temp. Sensor hole on the cylinder head is bigger than the sensor itself (this will be an easy fix in the near future) but as for the second difference is the automotive did not have a Hole with a tube that the marine one had... i had the machine shop drill a hole, and he did no problem and put in a brass tube matching the dimensions of the one in the marine head... now problem is the tube doesnt exactly look like the one in my marine head... the marine head has a lip (i am guessing for holding the seal in place...
the actual tube costs 121 dollars and that is not something i wanna pay for a copper tube...
question is do you think i can just have someone weld on a lip to hold the seal?
This tube is located under the Thermostat Housing.. i think its just a water bypass... please inform..
Tube PN is 806215,
and can be found as number 4 in this diagram.
http://www.volvopentastore.com/Cool...*****.019387142--store_id.366--view_id.771485
Cooling System Induction & Exhaust for that AQ130D.

Thank you.

 

[RogersJetboat454]

Re: AQ130D Tube on Cylinder Head

the marine head has a lip (i am guessing for holding the seal in place...

Yep..

do you think i can just have someone weld on a lip to hold the seal?

Weld.. No. Braze or solder (assuming the replacement is copper as well) possibly. But measurements should be made to make sure that the "lip" or seal retainer is in the correct position when affixed to the tube so the seal is not held to tight or too loose.



Here's a thought...

A bit on the Busch League side, but.. Why not get a copper washer with an I.D. that matches the O.D. of the new tube, and is roughly the same O.D. of the square seal, then place a hose clamp underneath it on the tube to hold it up into place.

This is something I would keep an eye on during regular inspections, but is certainly cheaper than the tube you are looking at.

BTW, whats wrong with the old tube that it can't be used, corrosion?

 

[Bondo]

Re: AQ130D Tube on Cylinder Head

but as for the second difference is the automotive did not have a Hole with a tube that the marine one had... i had the machine shop drill a hole, and he did no problem and put in a brass tube matching the dimensions of the one in the marine head... now problem is the tube doesnt exactly look like the one in my marine head... the marine head has a lip (i am guessing for holding the seal in place...

Ayuh,... I think ya need Pictures for this 1...

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

alright fellas! thanks for hoppin on this one. i quickly took some video just now i am uploading it and i will post pictures and video once its done uploading

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

Ok here you go... Here are the photos of the Original Head before i sent it to machine shop... (before they came back with results that the head had a crack between the seals...)
Notice in the first picture there is a lump... i think that is just the seal... because after machine work it was not there...

and here are the pictures that i took of it today just now... (it was hot tanked by the machine shop and when they encountered the crack they stopped..)

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

And here is the New automotive cylinder head that had the makeshift tube installed... with no lip

and the videos

 

[Allbutwet]

Re: AQ130D Tube on Cylinder Head

Hey I just went out and looked at mine. It appears to be stainless . Not that it matters at this point for you.After looking at it. I would be willing to bet that because this does not have a closed cooling system the point is to fill the head up with water for even cooling. That little tube is attached to a larger tube that runs the length of the head. This should be the by-pass for when the thermostat is closed.

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

That does make sense!! you really went out to your boat and looked at it? enjoy the snow tonight buddy im off to sleep... boeing never sleeps so unfortunately i have to go to work tommarow! thanks for your input sir...
also bond-o your request for pictures has been fulfilled and more so awaiting everyones responses.

 

[Allbutwet]

Re: AQ130D Tube on Cylinder Head

Lol! Yes I did go look. My head is sitting on my work bench tore down. And don't feel left out I too am going to work tommorow. Only instead of staying in town I'll be headed to Troutdale in the Gorge.:facepalm:

 

[RogersJetboat454]

Re: AQ130D Tube on Cylinder Head

Well... If you wanted to get crazy, you could transfer the old tube over to the new head as long as the O.D. of the tube matches the I.D. of the hole machined in the new head.

Anything else would be trial & error experimentation on your part. Another thought... what if you got a tube slightly larger then the one in your new head that you could cut to the right size and slip over the other tube to hold a seal in place?

If you want, I can draw my ideas out on a post-it...

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

No I understand what you are saying... that might be the simplest solution, im going to take a Digital Caliper to it today and see if i can get a piece of copper pipe to the exact ID thank you for all of your ideas, i will figure out what i am going to do and i will post back here asap

 

[RogersJetboat454]

Re: AQ130D Tube on Cylinder Head

No I understand what you are saying... that might be the simplest solution, im going to take a Digital Caliper to it today and see if i can get a piece of copper pipe to the exact ID thank you for all of your ideas, i will figure out what i am going to do and i will post back here asap

You're welcome. Just keep in mind you don't necessarily need to use copper. A length of steel pipe or a high temp plastic would work fine too.

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

that would be killer if i Found a Piece of PVC that would slide right on... i dont necessarily need a tight fit right? just enough to hold stop the seal from sliding down the shaft?

 

[Allbutwet]

Re: AQ130D Tube on Cylinder Head

If you would like I can Run out and tell you what the height is from the head to the top of the washer that was on there. As mine is still attached. Since this is a square cut oring what ever you use will have to put enough tension against the rubber seal to make it exspand enough to seal.

 

[Don S]

Re: AQ130D Tube on Cylinder Head

Your problem is this. That tube seals the thermostat housing with an oring. I must be in the correct location, or the thermostat housing will not line up with the block.
Now, the tube in your original head is in there with an oring. Which means it's stuck in the old head with corrosion and paint. Have you tried to remove the old one?

 

[dazk14]

Re: AQ130D Tube on Cylinder Head

What size is that tubing? It doesn't appear to have been turned...thus isn't there a coupling you can use? If it's copper, just solder it in the correct location. If the OD works, you can always drill the ID for fitment.

I think bondo mentioned it, a correct OD copper washer and drill the id, again solder in place.

A short piece of 14 gauge copper/romex to wrap the circumference and tack solder in place. Needle nose vice grips could hold it in place and you wouldn't need to fully solder it as it's simply mechanical stop.


Edit: I didn't see Don's post when I posted.

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

Allbutwet please do take a measurement i would appreciate it.. and The head gasket set i ordered came with Square Cut orings for the water cooling lines so i think i will be good there...

Don I have tried to take out the old tube but it would not come out it was a little stubborn... but i wil try again tommarow...

 

[Allbutwet]

Re: AQ130D Tube on Cylinder Head

Stand by. I'll text it to you.

 

[74bayliner]

Re: AQ130D Tube on Cylinder Head

Got it... Thanks for the measurements chris

 

[Don S]

Re: AQ130D Tube on Cylinder Head

Stand by. I'll text it to you.

Got it... Thanks for the measurements chris

Glad you got the measurements, it's a shame that only you two get to know what it is should someone else have the same question.
New members do look at these threads, many times years after this post.