making a tin

[greg press]

If i’m understanding everything i read about engine tins its main purpose is to keep exhaust heat of the the engine.If this is so why couldn’t you take a piece of diamond plate about 2 ft by 2ft atach it to the bumper bracket bend it over the muffler and under the bottom wheel .  

[Royal]

Greg, the main purpose of the tin is to distribute the cool air from the fan evenly around the cylinder fins so that the heat of combustion is carried away and does not melt the pistons or cylinders or the valves (especially the exhaust valves).  If the concern was exhaust heat, that could be fixed with a piece of 2×2 diamond plate.  🙂

Royal2012-12-09 11:31:26

[Paul Mossberg]

I’d say you are both right.

The function of the formed tin over the cylinder heads is to direct air from the cooling fan over the cylinder heads.

The rest of the tin surrounding the engine serves primarily to seal the upper engine compartment, separating it from the exhaust and heater boxes.

A piece of diamond plate will serve as a partial barrier, but I guess convection would still bring hot air up into the engine compartment.

That said, I confess I only have the cylinder head tin on my VW TD. Until that damn mouse built his nest underneath the cylinder head tin, I never had an overheating problem.

PMOSSBERG2012-12-09 11:45:49

Paul Mossberg
Former Owner of a 1981 Classic Roadsters Ltd. Duchess (VW)
2005 Intermeccanica Roadster

If you own a TDr and are not in the Registry, please go to https://tdreplica.com/forums/topic/mg-td-replica-registry/ and register (you need to copy and paste the link)

[Al Greig]

Bob and Dave have good information on engine cooling:

http://www.vw-resource.com/cooling_system.html

 

Al Greig

[Royal]

Sorry Paul.  

Don’t agree on main purpose.  

O ye’ll tak’ the high road (and take out the upper tin supplying air to the cylinders), 

and Ah’ll tak’ the low road (and take out all the other tin separating the upper and lower engine and exhaust)

And Ah’ll be in Scotlan’ afore ye! (if you ever make it)

This is not to say that things will be better without all the tin that VW envisioned.   But as we all know, separating upper from lower on our TDs is difficult for all, next to impossible for some.  

But I think you know that since that is actually the way you are running your TD (only supplying air to the fins around the cylinders).  

[Dan Ogle]

 Taken from Rob,and Dave’s

. The engine bay is sealed to prevent air from under the engine reaching the fan, because the air under the engine is very HOT. The fan gets it’s air through the vent holes on the engine lid, and under the rear window. Fresh air comes in from there, and hot air exits from under the car.

 

Tex2012-12-09 12:55:03

[greg press]

Another thing  i’m toying with Since my car is never driven winter would it be a good idea to by some fan shrouds plugs and  remove and plug up holes also holes on heater box since  no longer go in there  

[newkitman]

If you are not using the heat exchangers why not remove them (about 12 pounds each) and install J-pipes. Then plug off the outlets in the fan housing. J-Pipes move the exhaust from the 1 and 3 cylinders to the muffler and both weigh way less than just one of the eat exchangers. Just a thought.

Allen Caron
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The Shack

[Author]

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