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Old 09-06-2021, 08:24 PM   #1
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Rear engine cover under mattress

Hello again,
I warned you I would have lot's of questions. I need to take up the rear engine cover under the mattress so I can re-insulate for noise and heat. I removed 4 long philips head screws but the head is still not budging. Am I missing something? There is no apparent reason holding it down. Are there hidden fasteners that I can't see that need to be removed?
Thank you again
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Old 09-06-2021, 08:50 PM   #2
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Mine has latches at the foot of the bed, inside the storage compartment. Now tell me where the 4 long screws were. I haven't had mine open.
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Old 09-06-2021, 08:51 PM   #3
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The platform pivots at the head. Foot comes up. Get yourself a 2x4 long enough to hold it up, then be careful to not hit it.
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Old 09-07-2021, 06:45 AM   #4
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Engine cover platform

Quote:
Originally Posted by andy29847 View Post
Mine has latches at the foot of the bed, inside the storage compartment. Now tell me where the 4 long screws were. I haven't had mine open.
Andy,
The four long phillips head screws are under the mattress 2 on each side at least on my 36 SDS
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Old 09-07-2021, 10:55 AM   #5
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My 1998 36 FDS also has 4 hex head self tapping screws in the top of the engine cover. The screw down into the top of the sidewalls of the engine box
I never noticed them for the first few times I lifted the cover because I didn't remove the mattress.

There is nothing else other than gravity and the weight of the mattress holding the engine cover down.

Just lift the platform at the foot end and it will come up. It may be stuck if it hasn't been lifted recently.
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Old 09-07-2021, 06:51 PM   #6
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Pitch the mattress over to the passenger side floor. The lid is considerably lighter that way. I haven’t done it in so long I don’t recall if there are one or two support rods. The rod(s) will hold without the mattress on top. If you’re going to cut a piece of wood as a support, screw it in top and bottom. Some folks have modified the lid with gas struts to assist the lift.
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Old 09-08-2021, 08:07 AM   #7
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On our coach, the PO had installed 2 gas shocks to keep the bed up and then the support rod is there just for safety. Our coach was equipped with 2 rods but I removed one as it was not really needed and was getting in the way as we relocated our batteries (now lithium) to the space at the foot of the bed where the rods are located.
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Old 09-08-2021, 09:00 AM   #8
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Engine cover

Thank you all for your responses I will look for the latches at the foot if not I will see if the platform just lifts up. I'll report back on my findings. Thank you all again

Mike
36SDS
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Old 09-08-2021, 01:25 PM   #9
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Engine cover

Well I checked out the area at the foot of the bed and didn't find any latches. what I did find was a heater vent routed to either side of the doghouse. It appears there is a hinge at the head but I could not get the foot to budge. Any other suggestions this a 1999 36 SDS is this a peculiar model?
Any suggestions or help is a appreciated. I'm new to RVing and this model but I'm reasonably mechanical but this has me stumped.

Mike
1999 36 SDS
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Old 09-08-2021, 02:39 PM   #10
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Quote:
Originally Posted by mjvalliere View Post
Well I checked out the area at the foot of the bed and didn't find any latches. what I did find was a heater vent routed to either side of the doghouse. It appears there is a hinge at the head but I could not get the foot to budge. Any other suggestions this a 1999 36 SDS is this a peculiar model?
Any suggestions or help is a appreciated. I'm new to RVing and this model but I'm reasonably mechanical but this has me stumped.

Mike
1999 36 SDS
TO get to the patches you need to remove the 2 little panels under the mattress, the latches are inside that little compartment at the foot of the bed. Then reach in there and you will see the latches.... they may not be latched but they should be there
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Old 09-08-2021, 05:52 PM   #11
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[QUOTE=mjvalliere;5906578]Well I checked out the area at the foot of the bed and didn't find any latches. what I did find was a heater vent routed to either side of the doghouse. It appears there is a hinge at the head but I could not get the foot to budge. Any other suggestions this a 1999 36 SDS is this a peculiar model?

Your description describes the bed base/engine cover in my 1998, likely the same as your 1999. There are no panels under the mattress as Paul suggests. Mine has no latches of any kind and no evidence of ever having had any either on the lid, outside the box or inside the compartment that houses the heater vents.

Even with the mattress removed the engine cover is heavier than you would suspect.
If it hasn't been opened in a while it becomes 'stuck" to the remains of any rubber seals around the perimeter of the box.

With 2 people applying constant and prolonged lifting pressure on the opposite corners at the foot of the bed it should release and open up.

If that doesn't work I would place a wood block( to spread the load) under the forward lip of the cover and apply a small amount of upward pressure with a jack

You mentioned that you had removed 4 screws- the same number that were in mine. You may want to check once more to make sure you didn't miss any.

The 1998 and 1999 models are very similar and both are different in many ways from the later models,

My 1998 8.3 Cummins is completely mechanical- no onboard computer and no OBD port to connect to for engine diagnostics. Is that the case with your 1999?
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Old 09-09-2021, 07:01 AM   #12
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[QUOTE=gmcgene;5906861]
Quote:
Originally Posted by mjvalliere View Post
Well I checked out the area at the foot of the bed and didn't find any latches. what I did find was a heater vent routed to either side of the doghouse. It appears there is a hinge at the head but I could not get the foot to budge. Any other suggestions this a 1999 36 SDS is this a peculiar model?

Your description describes the bed base/engine cover in my 1998, likely the same as your 1999. There are no panels under the mattress as Paul suggests. Mine has no latches of any kind and no evidence of ever having had any either on the lid, outside the box or inside the compartment that houses the heater vents.

Even with the mattress removed the engine cover is heavier than you would suspect.
If it hasn't been opened in a while it becomes 'stuck" to the remains of any rubber seals around the perimeter of the box.

With 2 people applying constant and prolonged lifting pressure on the opposite corners at the foot of the bed it should release and open up.

If that doesn't work I would place a wood block( to spread the load) under the forward lip of the cover and apply a small amount of upward pressure with a jack

You mentioned that you had removed 4 screws- the same number that were in mine. You may want to check once more to make sure you didn't miss any.

The 1998 and 1999 models are very similar and both are different in many ways from the later models,

My 1998 8.3 Cummins is completely mechanical- no onboard computer and no OBD port to connect to for engine diagnostics. Is that the case with your 1999?
Gene, You mention your heater vents are in the compartment at the foot of the bed also. It appears from all the discussions that if the complete engine cover (dog House) lifts from the foot and is hinged at the head the heater vents have to be disconnected first. I'll disconnect the vents and get a pry bar under the foot and see what happens. I'm just afraid that something will snap and break. I'd really like to get rid of the old insulation that's falling apart
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Old 09-09-2021, 07:34 AM   #13
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The heating ducts and vents are not part of, or attached to, the lid that covers the engine. The entire box does not hinge up.
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Old 09-09-2021, 11:57 AM   #14
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Kid gloves,
So what you are saying is if I remove the 4 philips head screws the platform should lift up at what appears to be hinges under the carpeting? I attempted to lift that platform up but it felt like there was something else holding it down and I didn't want to snap the platform. The foot started to lift but it almost feels like there are more screws or something else holding it down about 2.5 ft from the head.
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