BTW, the engineers at GM who designed the fan shroud this way should be criminally prosecuted for crimes agains humanity. Seven push pins in the radiator cover, two bolts and four push pins on the shroud itself (plus one in the TCM that attaches to there shroud). As noted, the upper half of the radiator shroud must come out - that's the easy part. We also fabricate triple pass radiators for those who are pushing there machines to the limit, but I will save that for another blog. I don't trust myself to not gouge the radiator when removing the fan and shroud (which come out together), so I slipped a piece of cardboard ink between. If you want to know how we did it email me at or give us a call 86or if you dont want to mess with building one we have them in stock always and sell them for 54.99. Quality tested to ensure trouble-free installation and performance. But IIRC it is 44 mm, and a dedicated air hammer fan nut tool saves all kinds of hassle and time. Direct replacement for a proper fit every time. There are a variety of ways to get the fan nut off. Pulling it back up is far less time consuming than trying to fish it out from below. the effect of the shroud position on the performance of an automotive cooling fan with the radiator mounted at the front end has been studied on a test platform, and the characteristics of the flow.
Do tape some twine to your wrench, for dropping it a few times is inevitable. Don't try to get a ratchet and socket on these lower bolts, for the lower radiator shroud won't give enough room (unless, perhaps, you grind a i/4 inch socket shorter and perhaps use a socket cap and gear wrench).
Fan shroud how to#
And if you know how to remove what I believe is the intercooler pipe flexible boot on the passenger side, that will give very good maneuvering room for that lower passenger side bolt. Careful not to break one of the mounting tits or get the JB Weld out. 36HP Doghouse Shroud, Black with Ducts (Boxed), 9-Vein Design. Fan shroud has "top" indicated on back side it will only bolt up one way. 2 piece Dog House Back of Shroud, Destroyer Grey. Rubber lip faces in toward the engine and is not bent the other way. Be sure fan shroud rubber ring sits correctly in the lower portion of the radiator shroud before installing the bolts. I started to cross thread the lower passenger side bolt and had to run it through from the back side to clean it all up. Don't tighten bolts until all are started. In an earlier project (see appropriate link on this website) I replaced the radiator on my 1978 Jaguar XJ-S. You'll need small hands and wire on the bolt to direct them back in. Just a thought.A stubby 13 mm gear wrench will remove the lower bolts on the fan shroud. Keep it clamped in position until it has had time to cool. If you really want to keep the shroud that you have, you can try clamping it into the shape needed and applying heat from a heat gun. Dropping its diameter an inch or so isn't going to affect cooling that much, but its depth into the shroud is important. All CFM ratings are under resistance and actual numbers, vs cheaper fans that mis state this information. Our shroud kits feature SPAL USA fans and all aluminum fan construction. If the above aren't options, you may have to consider a smaller diameter fan. These high performance racing fan shroud kits are used for various all aluminum radiators. The fan really needs to be in the proper position in relation to the shroud or its purpose is defeated. Show all parts for option : S205A S823A S534A S530A. Tracking down parts and answers can eat up a lot of time. The flex fan and shroud came from Summit.
Inside the lips of my shroud is 19 1/2' an inch less than yours My fan is 17 1/2' Never cut down high priced parts If they dont fit, Send them back. It may be much easier to just replace it with one that has the correct shape or maybe adjust its mounting points by slotting the holes. Fan shroud.BMW parts catalog ETK contains detailed information on spare parts for cars manufactured by BMW since 1928. My shroud covers the core, at 20 3/4', Same as yours. What's the deal with the shroud? It sounds like it's deformed. If it's in good condition, it can be shimmed up if it doesn't affect the angles of the driveline, the shift/clutch linkage or accelerator linkage to where they can't be adjusted to compensate. Since the fan is hitting at the top, have you checked the condition of the transmission mount? If it is deterioriated, the engine will have an upward tilt. The fan needs to be half in and half way out of the shroud to be efficient.
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