1978 Mercury Grand Marquis oil pressure sending unit repair

[trendasell]

hey chad - I have a 2000 Grand Marquise - my hubby is attempting to change out the timing belt - the problem is we can't get the right valve cover off - any suggestions?

[trendasell]

hey chad - I have a 2000 Grand Marquise - my hubby is attempting to change out the timing belt - the problem is we can't get the right valve cover off - any suggestions?

[TheCubanMan728]

Change the lock on the truck, so you actually have a key to get into the trunk.

[Madness832]

Have a locksmith make a key, perhaps?

[TheCubanMan728]

lol, i meant Trunk*

[choppincrop29]

i had an oil leak on a 84 buick regal 3.8 motor and it was the oil pressure switch.thank you this post helped me out alot

[KMScarboy]

i would probably tighten that rocker if i were you...im sure it has a certain torque spec that it should be tightened to...any service manual for that car should have it...i would check the other rockers as long as i was at it too...

[aybesee123]

I bought a 78 Marquis....they didnt give me the trunk key either.

[gm1990ss]

have you considered torquing down the rocker arm bolts?

[rompn4x]

Man if you poured some seafoam cleaner down the carb, choke off the engine, wait 20 minutes and fire it up you would blow out so much smoke from all the carbon removed and burning

[lawnking168]

i forgot using marvel oil. that is a great idea!! i changed the oil about 3 months ago. but i don't want to change it untill i finish the work on the valve covers. i know that i will be cleaning up the heads when i get the covers off!! again, thanks for all you vidios!! don't know where you find all this stuff!! keep them coming!!! thanks!! i'll let you know how it comes out!!

[lawnking168]

hey chad. i like your idea about the pbc blaster. i am working on a 81 dodge pickup with a 318, and it dont have a rocker prob. but it was sitting for awhile. the lifters make some noise. i'm thinking that may help. now that i got it running, it dont make the noise so much. i am also replacing the covers and gaskets. i found a vintage pair of mt cast alum. covers to help with the leakage. i also think that the rockers shold not have any play as well. i'll check mine. any thoughts?? thanks!

[retrochad]

How long since the oil was changed on your truck? I know also on my 1974 GMC bus there was lifter noise and an oil change and filter cured it. You might try some Marvel mystery oil mixed in with the oil, and then change the oil and filter.

[kaiyoshi2243]

She sounds pretty good. I think there's a way to tighten the rocker arms so their not so loose. But I'm not sure. That was pretty neat seeing the valve train with the covers off and the engine running.

[BusDriverStevo]

i use 20-50 oil in my old cars to thats gd oil 4 these old engines it has good thickness even wen oil gets hot

[jefferyb304]

there appears to be a manual linkage that opens the trunk in my Toyota. I didn't know they had such options back that far.

[me748]

wow those really are nasty plugs, glad you replaced those plugs. hope the grand marquis keeps running good.

[1944johndeerel]

did you ever fix that old ford air compressor?

[retrochad]

Not yet but I will! I'm thinking I have a bad cable from the coil to the distributor.

[1944johndeerel]

if thats truely all thats wrong thats an easy fix as you know! i hope thats it!

[67tr876]

looks great ! man

[AllAmericanFiveRadio]

Now that you have no need for the original Oil Pressure Switch Socket, Murphy will put it back.

[retrochad]

I know what you mean....still haven't found the original one I bought though. This time I took the tool box out to the car and put every single thing away right after I was done!

[AllAmericanFiveRadio]

I should not volunteer this information but I had two transistor globe radios. I decided to give one to friend and now I can't find the one I have. I would like to take the batteries out of it. That Murphy better not get in front of my Blazer.

[123demaio]

your cat has approved this car before the other didn't care much for the bus..

[wilkes85]

Oh man that old spark plug was NASTY! I should really replace mine... my engine is starting to run like crap, and I know it's because of the antique spark plugs in it lol

[starlite2991]

Chad  you need to have the valves adjusted on the passanger side.

[kjm1983]

The plungers inside the lifters are likely needing all the oil pressure they can get to still keep the valvetrain tight, so when the oil got low it probably caused them to clatter.

Just a "live with it" thing, nothing that will kill it.

[kjm1983]

Chad, that engine is very elderly, so I would be quite proud that it runs as good as it does if I were you :-)

It probably has worn valve seats, worn timing chain that's making the ignition timing bounce around a lot, worn oil pump, worn rings..lol..so no excuses necessary!

[retrochad]

Would you recommend an overhaul of this engine at all or might it be better to go with a new long block? This is about the best the engine has performed the whole time I have owned it. It always starts up and keeps going down the road but I just worry about it developing more problems being so worn out.

[bbishoppcm]

Sounds like one or more faulty hydraulic lifters...

[gpesanti]

you need your self a new used car chad instead of more new used buses :D

[TheTarrMan]

I believe the rockers should not have any play at all. Check to make sure the blot's are tight, and make sure the push rod's aren't bent.

[pickupman1995]

I love huge cars :) What engine does it have?

[retrochad]

Thanks! It is a 400 CID.