Question about 1991 Lincoln Town Car

2 Answers

What does it mean when your heads are in need of an overhaul?

Posted by mike_pettawa on

Ad

2 Answers

Michael Thomas

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,053 Answers

Helo there and welcome to fixya
This is a general term used an it simply means that the heads need to be rebuilt or internal parts need replacement here is the entire procedure as if you were doing it

    • 1 Remove the cylinder head if you have not yet done so.
    • 2 Clean the cylinder head with degreaser or parts cleaner. Look carefully for cracks. If the cylinder head is cracked, it is not repairable as it has lost its structural integrity.
    • Sponsored Links
    • 3 Remove the camshaft. Refer to a vehicle-specific repair manual for torque figures and diagrams. Many vehicles require the camshaft retaining bolts to be removed gradually and in order to prevent damage to the camshaft. Generally, you will start at the outside ends of the camshaft.
    • 4 Remove the camshaft bearings and place them aside.
    • 5 Remove the valves. Position a socket just larger than the valve stem over the valve and strike it with a hammer. This breaks the valve keepers loose from the valve stem. Compress the spring with the compression tool. Remove the keepers and guides. Decompress the spring, and remove it. Lift the cylinder head and slide the valve out the bottom. Repeat for each valve.
    • 6 Remove head gasket material stuck to the cylinder head. Use a flat razor to scrape it off.
    • 7 Check the cylinder head for warping. Flip the head so the side receiving the head gasket faces up, and lay a straightedge across the block from corner to corner. If the straightedge rocks or if you can see light under it the center, the head is definitely warped. Check both corner-to-corner angles (an X pattern). This method will only detect severe warping. Attempt to slide the narrowest feeler gauge under the straightedge. If you can insert any feeler gauge under the straightedge, the head is warped. If the head is warped, take it to a machine shop or auto parts store and have it resurfaced.
    • 8 Replace the valve seals. This is another procedure likely requiring a trip to the machine shop. If the head was badly damaged, the seats where the valve seals fit need to be reamed out, something only a machine shop can do.
    • 9 Replace the valves (only necessary if you have an interference engine that slipped or broke its timing belt). In an interference engine, the cylinders will impact the valves if the engine is out of time, damaging the valves. If the valves were not damaged, use the original valves.
    • 10 Reinstall the valve keepers and springs.
    • 11 Reinstall the camshaft. Reverse the removal pattern to bolt it in.
    • 12 Adjust the valve lash.

Read more: How to Repair Cylinder Heads ' eHow.com http://www.ehow.com/how_7822917_repair-cylinder-heads.html#ixzz1pDgalhuX

Posted on Mar 15, 2012

Ad

Reynaldo Andico

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Lincoln Master
  • 2,431 Answers

What that means are new valve seats and valve guide, with new valve stem,with new or refurbished valves,This is a common need after so many years in service

Posted on Mar 15, 2012

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Toyota 2kdv engine average running KM between overhauls


Hi there
When you say overhauls ,well that depends on what you use it for/and do you mean engine overhauls or servicing,
Engine overhauls anything between 130.000 to 200,000 and serviceing every 10,000 km or 6000 miles depending on the type of oil and how many long runs you do per week.

Nov 05, 2014 | Cars & Trucks

1 Answer

A drawn out squirmy noise in the head only when you rev


Is there a chain drive to overhead cams? If so, maybe the tensioner, chain or gears are bad.

Jan 28, 2018 | 1990 Nissan Minivan

1 Answer

Repair Audi s3 2002 model 1,8 Quattro


if the cylinder head is the problem just replace it, but the leaking could just be from faulty head gasket you dont need it overhauled, all it needs to be done is take the cylinder head out put new head gasket

Mar 16, 2014 | Cars & Trucks

1 Answer

1995 chevy blazer fouling on number 2 cylinder


with this issue , fouling can mean many things, i,ll assume, & i don,t like assuing at all, ? i,ll assume you mean missfiring inderperforming two different issues, two answers, (1) missfiring ,ok change all plugs and remove and overhaul number two injector, replace it,, (2) fouling,? under performing, this can have a few causes i,ll list all, pressure loss in cylinder due to either worn piston rings or valve seatings, or head gasket,?(a) piston rings, luckily this is probably not the problem as usually all 6 cylinders would be effected, (b) valve seatings , hope its not this as it,s a major opperation involving removing the cylinder head an totally reconditoning it, all valves cleaning and reseating, replacing vavle seals , new head gasket ,inlet manifold gaket , exhaust manifold gasket, a good mechanic can get away with changing only the head gasket, but that ain.t you,unfortunatly, so hope its (a) peter.

Sep 01, 2012 | Chevrolet Spark Cars & Trucks

1 Answer

What does it mean when your car heads are in need of an overhaul?


it means that either the head sealing surface is warped (un-even) or it has damage from being run low on oil

Mar 15, 2012 | 1991 Lincoln Town Car

1 Answer

After misfiring for about a week my 2002 Qx4 infiniti engine started overheating. took it to a dealer who changed the radiator then reports that engine needs overhaul after water found now coming from the...


They changed the radiator and then told you need the engine overhauled? That tells me you don't want to deal with them! Any shop should have tested things out not just arbitraly start replacing parts. So unless your vehicle is still under warranty, then I would take it somewhere else to have them work on it.

Since I am not there to check out your vehicle, this is a WAG on what is going on with your engine.

Since you started off with misfiring - that could be a sign that your spark plugs are being fouled by oil or a few more things. But not usually an indication of a cracked block at least at that point.

But then you add the overheating into the equation - depending on how fast it overheats - right away (a couple of blocks driving) could mean either a blown head gasket or a cracked block but slowly could mean low coolant; radiator blockage, and so many more things.

If your engine was misfiring, you should have gotten an error code from your computer, which if acted on right away could have been a much cheaper fix. Now with what should like either a blown head gasket or maybe even a chrack block you are talking major work and dollars!

Jul 03, 2011 | 2004 Infiniti QX4

2 Answers

My 1995 olds royal 88 has blue smoke coming from engine area


Blue smoke is oil and if it's coming from your engine compartment most likely means the gasket on your valve cover either needs to be replaced or it could even be as simple and needing to tighten the valve cover bolts a bit. Oil is leaking from the valve covers and working it's way to your hot exhaust manifold and that is where the smoking is most likely coming from.

Oct 08, 2009 | 1995 Oldsmobile 88

1 Answer

Considering buying a 94 volvo 940 gl


Hello, it sounds as if the person had an issue with the head. There is no mention of pistons, rings, connecting rod bearings, engine main bearings, oil pump. These are parts to an engine overhaul. It sounds as if they had maybe a timing belt to break and may have bent valves or either the bolt that broke off required them to pull the head off the engine to have bolt drilled out. Please rate my answer, Thank you.

Apr 06, 2009 | 1994 Volvo 940

Not finding what you are looking for?
1991 Lincoln Town Car Logo

378 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lincoln Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a Lincoln Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...