TheSamba.com :: View topic - Type 181 / 126

Sun Feb 28, 2010 1:19 pm

In another thread about sled tins and their importance in engine cooling the topic of "j tube" tin was brought up. I started this thread to make it easier to find when searching.

In order to direct the spent cooling air out the back of the car the sled tin and heater boxes must be in place. If the heater boxes are removed the spent air goes out the sides of the tin instead of to the rear of the car. Type 181 (thing/safari) with gas heaters and industrial engines did not have heater boxes but still needed to direct the air away from the engine. VW used these small tins to box in the sled tin as the heater box once did.

Below is a pic of the tin and a drawing with dimensions so you can make your own.

Dimensions:

Right

Left

[/quote]

Drawings not to scale

Sun Feb 28, 2010 1:23 pm

Here's another picture of the original tins.

Installed.

And if you rather buy reproductions rather than making your own, you can get them here:
http://www.awesomepowdercoat.com/Industrial_Shields.html

Sun Feb 28, 2010 1:43 pm

These tins were factory installed on 1500 engines and 1600 engines in a Type 181/Thing without heater boxes and on all Type 126 industrial engines.

Sun Feb 28, 2010 1:46 pm

What secures the outside edge of the tin? It looks like it could create an irritating rattle/buzz.

Sun Feb 28, 2010 1:50 pm

Chad1376 wrote: What secures the outside edge of the tin? It looks like it could create an irritating rattle/buzz.
Nothing..... I twisted the sleds so they apply some pressure to the shields and are held tightly against the heads.

They do not rattle.

Fri Feb 03, 2012 11:34 pm

Glenn, have you tested temps with and without these tins? First time I have ever heard of these. I am running j-tubes on my bus but right now its winter so I'm not concerned with overheating but when summer comes and I move out west, I'll be driving in heat and will be concerned.

Sat Feb 04, 2012 4:36 am

I've only run my engine with them.

Sat Feb 04, 2012 1:32 pm

ok. looks like ill be making them when it starts to warm up. thank you.

Sat Feb 04, 2012 4:28 pm

As soon as we get the water jet set back up I will be making a few sets from stainless.

Casey

Sun Feb 05, 2012 11:32 am

I hear alot about Jtubes and I am not sure what people are talking about, as I am have not owned aircools very long. I have a 64 with heater boxes and I a have a 71 without. It has aftermarket exhaust and have simaler tubes as the pic below, but tucked up closer to the head. Are the J tubes the tubes that connect to the exhaust and are running alongside the head?

Sun Feb 05, 2012 11:37 am

J-tube:

Sun Feb 05, 2012 11:38 am

Lucatero wrote: Are the J tubes the tubes that connect to the exhaust and are running alongside the head?
Yes, that's them.

Paul

Sun Feb 05, 2012 11:52 am

Thanks for the speedy reply, those are in place, now I just need to put the pieces of tin on the sled and box it in to make it complete.

Sun Feb 05, 2012 12:41 pm

durfeec wrote: Glenn, have you tested temps with and without these tins? First time I have ever heard of these. I am running j-tubes on my bus but right now its winter so I'm not concerned with overheating but when summer comes and I move out west, I'll be driving in heat and will be concerned.
Howard Washington reported a 10ºF oil temp drop by installing a sheet metal shield between the J tube and the pushrod tubes.

Sun Feb 05, 2012 8:12 pm

Bruce wrote: durfeec wrote: Glenn, have you tested temps with and without these tins? First time I have ever heard of these. I am running j-tubes on my bus but right now its winter so I'm not concerned with overheating but when summer comes and I move out west, I'll be driving in heat and will be concerned.
Howard Washington reported a 10ºF oil temp drop by installing a sheet metal shield between the J tube and the pushrod tubes.

wow. thank you.

Tue Feb 07, 2012 3:24 pm

Bruce wrote: durfeec wrote: Glenn, have you tested temps with and without these tins? First time I have ever heard of these. I am running j-tubes on my bus but right now its winter so I'm not concerned with overheating but when summer comes and I move out west, I'll be driving in heat and will be concerned.
Howard Washington reported a 10ºF oil temp drop by installing a sheet metal shield between the J tube and the pushrod tubes.

Ive noticed that there is no more burnt oil in the tubes when running the industrial tins, evidence that it was heating the oil when going back into the case from the heads

Tue Aug 14, 2012 7:07 pm

I'm glad I ran across this. I installed j tubes a couple of weeks ago and hadn't heard of these sleds until now. Stupid question.....engine doesn't have to be out to install right?

Tue Aug 14, 2012 7:28 pm

Right

Wed Aug 15, 2012 1:36 pm

chrisdiehl wrote: I'm glad I ran across this. I installed j tubes a couple of weeks ago and hadn't heard of these sleds until now. Stupid question.....engine doesn't have to be out to install right?

sleds are used even with factory heater boxes. they are what protect your push rod tubes. and it would be easier to install with the motor out since they bolt to the backside of the cylinder head tin. the tin that this thread is about is something different than just a sled and can be installed without removing the motor.

Tue Aug 21, 2012 4:52 am

Just as a note, next to Glenn´s Berg header, I just found out thtat CSP Python fits with original 1600 engine sled tins and industrial tins too!