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Tcash
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Joined: July 20, 2011
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Location: San Jose, California, USA
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Target
Samba Member
Joined: August 09, 2017
Posts: 60
Location: Los Angeles
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 Posted: Tue May 15, 2018 8:33 pm Post subject: Re: The Stupid Question Thread |
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Type IV engine. What are these two giant bolts on either side of the intake for? Both sides have them.
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busdaddy
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Joined: February 12, 2004
Posts: 51128
Location: Surrey B.C. Canada, but thinking of Ukraine
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Wildthings
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Joined: March 13, 2005
Posts: 50338
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| Posted: Tue May 15, 2018 10:11 pm Post subject: Re: The Stupid Question Thread |
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| Target wrote: |
Type IV engine. What are these two giant bolts on either side of the intake for? Both sides have them.
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Certain early Type 4 engines had air injection ports into the exhaust. I would assume the bolts are blocking off these ports. |
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Target
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Joined: August 09, 2017
Posts: 60
Location: Los Angeles
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| Posted: Wed May 16, 2018 1:00 am Post subject: Re: The Stupid Question Thread |
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Thanks. That points me in the right direction.
Hey now, imgur at least has a stable source of revenue. Unlike photobucket.
| Wildthings wrote: |
Certain early Type 4 engines had air injection ports into the exhaust. I would assume the bolts are blocking off these ports. |
That makes sense. These bolts are threaded DEEP. Deep enough that I'd be worried it's going to impact air flow. Is there a preferred way to plug these? Whole smog system is long gone.
My searching is coming up with 10mm bolts, saw off the heads, and locktite them in place but I'm still weary the bolts are too long. Is that a possibility or should I just not worry about it? |
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Wildthings
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Joined: March 13, 2005
Posts: 50338
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| Posted: Wed May 16, 2018 4:11 am Post subject: Re: The Stupid Question Thread |
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Ideally you would want them flush inside the exhaust port to minimize their effect on air flow, but without removing the heads this would be hard to accomplish. They also hold the tin in place so having a standard bolt with a head verses a valve adjusting screw installed deep in the hole is good. The holes also can be welded up and then tapped for a 6mm screw to hold the tin.
For now I would just leave them the way they are. |
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Sawspa
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Joined: May 12, 2012
Posts: 173
Location: South-East Ohio
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| Posted: Wed May 16, 2018 7:54 am Post subject: Re: The Stupid Question Thread |
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https://www.thesamba.com/vw/classifieds/detail.php?id=2130973
Do you guys know if this system will fit up to my bus? I have a 78 2.0L fuel injection. Will the heater boxes match up?
_________________
1978 Westfalia Campmobile 2.0L oversized ham heads and a stepped up cam, running points and a 76 exhaust "Lefty Loosy" |
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Wildthings
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Joined: March 13, 2005
Posts: 50338
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| Posted: Wed May 16, 2018 8:40 am Post subject: Re: The Stupid Question Thread |
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Assuming you still have oval port heads and don't have to meet any visual or other smog requirements it should work. From the flanges through the heater boxes it is original, but the pipes and muffler are not. |
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Sawspa
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Joined: May 12, 2012
Posts: 173
Location: South-East Ohio
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| Posted: Wed May 16, 2018 8:52 am Post subject: Re: The Stupid Question Thread |
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| Wildthings wrote: |
Assuming you still have oval port heads and don't have to meet any visual or other smog requirements it should work. From the flanges through the heater boxes it is original, but the pipes and muffler are not. |
Thank you! I don’t really need to meet any visual requirements, just wanted the holes and heater holes to match up. Im hoping the aftermarket collector pipe and muffler will stuff up in there as well. Thanks for the quick reply!
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1978 Westfalia Campmobile 2.0L oversized ham heads and a stepped up cam, running points and a 76 exhaust "Lefty Loosy" |
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cv66seabear
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Joined: February 18, 2017
Posts: 105
Location: Wisconsin
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| Posted: Wed May 16, 2018 7:13 pm Post subject: Re: The Stupid Question Thread |
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My 79 Westy's turn signals don't auto-cancel. I know there is a signal cancelling ring for Bugs, is there one for busses?
TIA for the help.
Kent
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"Not all who wander are lost." JRR Tolkien
1979 Campmobile - "Pancho Verde"
Old Friends - gone now:
1964 Beetle "Liebchen"
Mark 3 Jetta "Liebchen Zwei"
Passat Wagon "Wolf"
2015 Passat Sedan "Rudy" |
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busdaddy
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Joined: February 12, 2004
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Location: Surrey B.C. Canada, but thinking of Ukraine
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Wasted youth
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Joined: July 06, 2012
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Location: California's Hot and Smoggy Central Valley
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| Posted: Thu May 17, 2018 5:06 pm Post subject: Re: The Stupid Question Thread |
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| Target wrote: |
Type IV engine. What are these two giant bolts on either side of the intake for? Both sides have them.
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These, probably. Kinda doubt they are bolt threads, more likely plumbing thread cut. Not the same animal. These were on my 1700cc 1973 bus engine which came factory equipped with a air injection system for emissions. These are threaded tubing connections.
I removed that engine long ago, but you can plug the holes after removing the tubes.
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Target
Samba Member
Joined: August 09, 2017
Posts: 60
Location: Los Angeles
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| Posted: Thu May 17, 2018 6:48 pm Post subject: Re: The Stupid Question Thread |
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Follow up on those bolts. I think they're most certainly too long judging by the soot on the end of each bolt.
Alright, another stupid question. I know the tins are important and I have most of them installed. But I'm missing the Deflector Plates, Left Rear Cover Plates, Right Rear Cover Plate, and the Left Rear Air Duct.
All going off of the Bentley "Engine and Clutch" section page 20.
How crucial are the deflector plates? And can the remaining missing pieces be installed after the engine in installed? Or is that an astronomical pain in the ass.
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Wildthings
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Joined: March 13, 2005
Posts: 50338
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| Posted: Thu May 17, 2018 8:31 pm Post subject: Re: The Stupid Question Thread |
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| Target wrote: |
Follow up on those bolts. I think they're most certainly too long judging by the soot on the end of each bolt.
Alright, another stupid question. I know the tins are important and I have most of them installed. But I'm missing the Deflector Plates, Left Rear Cover Plates, Right Rear Cover Plate, and the Left Rear Air Duct.
All going off of the Bentley "Engine and Clutch" section page 20.
How crucial are the deflector plates? And can the remaining missing pieces be installed after the engine in installed? Or is that an astronomical pain in the ass.
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Those bolts don't look like the correct 10x1mm thread, so don't know what is going on there. You should be able to figure out the correct length fairly close by making some kind of gauge to check the depth, like a piece of stiff wire with a 90° bend in its end. Assuming your present bolts have something besides the 10x1mm thread, you should go with the threads your present bolts have.
Yes you need all the tins, the deflectors in particular.
Last edited by Wildthings on Thu May 17, 2018 9:17 pm; edited 1 time in total |
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Target
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Posts: 60
Location: Los Angeles
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| Posted: Thu May 17, 2018 8:43 pm Post subject: Re: The Stupid Question Thread |
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| Wildthings wrote: |
Those bolts don't look like the correct 10x1mm thread, so don't know what is going on there. You should be able to figure out the correct length fairly close by making some kind of gauge to check the depth, like a piece of stiff wire with a 90° bend in its end. Assuming your present bolts have something besides the 10x1mm thread, you should go with the threads your present bolts have.
Yes you need all the tine, the deflectors in particular. |
The bolts aren't crossed but they are a loose in the hole. I'll figure something out. Worst case scenario is to weld a washer to the base as a stop. It might be an 8x1.
The PO who setup this motor is the same one who thought a solid inch of body filler on the B pillar was an acceptable repair.
What about installing them before or after the motor is in? Cause the preferred timeline would be after the motor is in but I don't want to shoot myself in the foot. Deflectors seem like a before item. |
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Tcash
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Location: San Jose, California, USA
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Target
Samba Member
Joined: August 09, 2017
Posts: 60
Location: Los Angeles
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| Posted: Fri May 18, 2018 10:38 pm Post subject: Re: The Stupid Question Thread |
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I picked up a set of deflector tins and the left rear air duct today. None of the classified or eBay listings seem to have the trio of "rear" cover plates.
I'd really like to know IF they can be installed once the engine is in. |
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Volswagon
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Joined: December 29, 2009
Posts: 299
Location: Knoxville, TN
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| Posted: Sat May 19, 2018 2:07 am Post subject: Re: The Stupid Question Thread |
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| Target wrote: |
The bolts aren't crossed but they are a loose in the hole. I'll figure something out. Worst case scenario is to weld a washer to the base as a stop. It might be an 8x1.
The PO who setup this motor is the same one who thought a solid inch of body filler on the B pillar was an acceptable repair.
What about installing them before or after the motor is in? Cause the preferred timeline would be after the motor is in but I don't want to shoot myself in the foot. Deflectors seem like a before item. |
Those bolts are for plugging threaded holes in the exhaust ports in the heads. The soot indicates how far into the ports they are protruding, blocking the flow. Or they may not even be threaded into the port, leaving a fatal exhaust leak that will burn the heads. They can only be seen in the ports with the heater boxes removed.
I seem to recall that seat belt mounting bolts are good for that purpose as they don't protrude up thru the tins. I've put JB Weld on the threads before to seal them.
The trick is to plug the holes without blocking flow. And not to have to remove them with the engine tins.
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I know the pieces fit, cos I watched them fall away.
Wanna hear God laugh? Just talk about your plans.
'75 Bus https://www.thesamba.com/vw/forum/viewtopic.php?t=697183&highlight= |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50338
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| Posted: Sat May 19, 2018 3:26 am Post subject: Re: The Stupid Question Thread |
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| Target wrote: |
I picked up a set of deflector tins and the left rear air duct today. None of the classified or eBay listings seem to have the trio of "rear" cover plates.
I'd really like to know IF they can be installed once the engine is in. |
Give us a number from this thread of the piece of tin you are talking about:
https://www.thesamba.com/vw/forum/viewtopic.php?t=585135, both from the Micro Fiche and the photos. |
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51128
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Sat May 19, 2018 9:05 am Post subject: Re: The Stupid Question Thread |
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| Volswagon wrote: |
| I seem to recall that seat belt mounting bolts are good for that purpose as they don't protrude up thru the tins. |
Seat belt bolts are 7/16"x20, although somewhat close in diameter and pitch they will be making new threads and a mess as they go in. Valve adjuster screws are the #1 choice for air injection holes, same thread as the holes in the head, short enough to not reach into the port and no head to interfere with the tin.
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