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    455 spark plugs

    Since I don’t have a 403 I didn’t ask him. It’s likely the same plug but perhaps you should email him and ask. Emery Stora 77 Kingsley Frederick CO > > What did Dick say for an Olds 403 engine?? > JR Wheeler 78 Royale 73 Painted Desert > > > On Wed, Dec 11, 2019 at 12:28 PM Jim Kanomata...
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    455 spark plugs

    I forgot to say that Dick Paterson recommends always using a torque wrench when installing plugs. Most of us just spin them in and lean on the wrench. Dick says to torque them to 26-30 ft-lbs. Over torque can distort the thin base and fracture the “gas tight” seals between the porcelain and...
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    455 spark plugs

    Dick Paterson has long recommended the NGK # XR51X (7355) spark plugs for the Olds 455 engine gapped at .038 to .040 I went onto the internet to check prices. I had bought them in the past at O’Reilly. Their price is currently 8.99 each at the store. Amazon is 10.01 with free shipping. Summit...
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    Interested in avoiding bebuilding your 403/455

    The classic definition of a interference engine is: An interference engine is a type of 4-stroke internal combustion piston engine in which one or more valves in the fully open position extends into any area through which the piston may travel. By contrast, in a non-interference engine, the...
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    Difference between GMC and Toro front wheel bearings ?

    There is no difference between the car and the motorhome wheel bearings. Years ago there was a difference in tolerances but that was standardized. The removal and installation is identical. Emery Stora > > Thanks. My question is if the Toronado wheel bearing are as difficult to remove? > >...
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    Front Wheel bearings

    No. The Set 23 includes 2 wheel bearings and the spacer. So you only need two sets to d o the front of the GMC Motorhome. You are correct n the rears. Emery Stora > > Usually a "set" means you get a matched bearing and race.... not 2 bearings and 2 races. If you order rear bearings for the...
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    Cleaning A/C compressor

    I know well what all the parts are named and where they are located. Kanomata was talking in one message about the lower part of the radiator ; ergo— the condensor. Emery Stora > > Or are they really talking about the evaporator? > > The condenser is in front of the radiator. > > The...
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    Cleaning A/C compressor

    Yes, and people keep wanting to call it “Cleaning A/C compressor. I think they mean A/C condenser. Emery Stora 77 Kingsley Frederick CO > > Eric keeps calling it the front clip. It's header panel, grill and bumper cover. Clip includes hood and 2 fenders. Also if the condenser was still wet >...
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    Happy Thanksgiving

    Hope all have a great Thanksgiving. I am home with a broken foot. I slipped going up my front stairs and fell back four steps. My head hit the driveway but didn’t crack any concrete! I have a large plastic orthopedic boot and a cane so I can hobble around. My daughter and family are here. I am...
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    ZEO6582 or ZEO6581

    I haven’t heard from you yet if it’s 23’ or 26’. You can just take a tape measure to check that. The result would rule out several models. Emery Stora > > Gino and Rose, if you still have the glove box sticker, the first thing listed is model #. This is an example found on the photo site. >...
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    ZEO6582 or ZEO6581

    A Birchaven is only a 23 foot. It also is a Transmode converted to a motorhome by Coachmen Industries. Coachman also converted 26’ transmodes. They were called Royales. Emery Stora 77 Kingsley Frederick CO > > Thank you so much for the responses. I will definitely update our profile. In the...
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    Pork chop

    BAD! You can swap end to end but not left and right! Think abut it. Emery Stora > > What would happen if you swapped bars from left to right side of coach? Twisting in the other direction....Good or bad idea? > -- > Larry > 78 Royale w/500 Caddy > Menomonie, WI. > >...
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    Help! What Could Cause Unidentified LOUD Alarm?

    Vern Directly from the sensor in the tank. It will read the tank that is selected from the dash switch Emery Stora > > Thanks again Bruce, but I've ruled that one out also. On my coach the door > is apparently not tied into a buzzer, however if the entry door is not > closed tightly the...
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    Oil cooler line connections

    Matt I had bought the Harbor Freight assortment and used my flare tool to make a flat washer into a conical one. It then worked fine in an inversed flare fitting. Emery Stora > >> Harbor Freight sells an assortment of copper washers. >>...
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    ONAN oil leak repairs

    Do you get the GMCMI magazine? If not you can read it online at GMCMI.com. I wrote an article about Onan oil leaks in the last issue. Not difficult to fix. If you can’t find the article let me know and I’ll send it to you. Emery Stora 77 Kingsley Frederick,CO > > SO when I turn on my ONAN...
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    Random Question

    On the inside of the distributor there is a short bolt used to ground the internal wiring harness. You can just replace that bolt with one about 1/2” longer. It will stick out the bottom of the distributor and you cam them put a wire with a a round terminal on the bolt and use a lock washer and...
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    New GMC Forum Follow-on

    Rick Don’t assume that when you retire you are going to have lots of free time. I retired at 55 and have been retired for close to 20 years now. Before I retired someone told me that I should get everything done that I really wanted to do because once I retired I wouldn’t have time to do it. I...
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    Fuel stabilizer or not?

    Not all alcohol is the same. Ethanol is in the fuel now. Heet was methanol. Methanol has one carbon while Ethanol has two. Methanol is better at absorbing water. Emery Stora > > Funny part is now we hate alcohol in fuel. When we were kids our dads probably all bought HEET by the case and...
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    Dead coach update

    12 deg May be a little too much. With vacuum advance connected you are over 12 deg. Try setting vacuum advance a little lower. Try 8deg and then hook up the vacuum and see if it still backfires. Emery Stora 77 Kingsley Frederick, CO > > I still was having trouble. Appeared to be timing...
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    Door curve

    I coined the term “middle age spread” at that time. Emery Stora > > It is on Gene Fisher’s site. If you can’t find it let me know and I’ll send it to you > > Emery Stora > >> >> To All: >> >> I believe that Emery Stora did an article on fixing the coach spread that sometimes occurs on...