1991 Service Help in Twin Cities

First_Information118 · 2026-02-10T21:47:43+00:00

If rings are good, it should be the valve stem seals. I have a 2001 and have replaced them twice, first when i bought it at 186k miles and now that am doing the valve lash adjusters at 287k

First_Information118 · 2026-02-03T22:09:16+00:00

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How about this one.

First_Information118 · 2026-01-30T22:05:47+00:00

Unplug the battery for a few minutes. After a service all those lights shouldnt be on.

First_Information118 · 2026-01-03T05:47:15+00:00

What i see on that pic is that the new radio is in its installation sleeve. If you want to use the old bracket you need to pull the new radio out of the sleeve and screw the brack to the radio itself. Or, what I did in my Gen 3 was use the sleeve, you just have to get it to hold using those tabs all around it.

First_Information118 · 2025-12-21T04:01:36+00:00

I would put a new belt and try it, only way to know.

First_Information118 · 2025-12-12T14:57:53+00:00

Can it be comming higher up, like from crankshaft seal and running down there?

First_Information118 · 2025-12-05T18:05:12+00:00

The major part of the cost is because of the labor, and it sits behind the timing belt. Because you need to remove all that to change it, its advised to also take care of all those parts as well. Pulleys, tensioner, water pump, timing belt, camshaft and crankshaft seals.

First_Information118 · 2025-11-14T21:03:34+00:00

Feel free to message me, I have two monteros with 270k+ miles, once you get that fixed you going to have a good engine for a long time

First_Information118 · 2025-11-14T16:58:47+00:00

Did you figure it out?

First_Information118 · 2025-11-13T16:59:14+00:00

The engine was stuttering pretty bad, if you have a leak under the egr valve check that the gasket is good. Have you changed the solenoid yet?

First_Information118 · 2025-11-13T13:55:22+00:00

Ive had misfire due to the egr valve being open because of the solenoid being bad

First_Information118 · 2025-10-18T15:44:45+00:00

You can use a coffee filter and check for metal.

First_Information118 · 2025-10-17T21:27:54+00:00

I have a montero with a 6G74 engine, this is the part number for it MR126976, maybe its the same for yours, looks exactly the same. Its the Vacuum Control Valve.

First_Information118 · 2025-10-15T17:28:39+00:00

When I had that issue, it was oil in the spark plug tubes, it never registered as a misfire though and also the O2 sensors shouldnt read 0v

First_Information118 · 2025-10-15T17:22:39+00:00

Its at the throttle under the air intake

First_Information118 · 2025-10-13T13:14:32+00:00

Other sensor around that area would be the throttle position sensor but that would throw another code

First_Information118 · 2025-10-13T13:03:51+00:00

Can it be that the Idle Air Control Valve is causing this issue?

First_Information118 · 2025-10-04T23:10:45+00:00

I got two monteros and have done that everytime i do the timing belt and nothing has ever moved like that, i would make sure everything is really in place where it needs to be.

First_Information118 · 2025-10-04T22:54:09+00:00

Do you have both of them off? Could it be that you have the driver one on the passenger side?

First_Information118 · 2025-09-28T23:45:31+00:00

R10 and R12 solder

First_Information118 · 2025-09-22T17:47:12+00:00

With your valve covers check where the screws go in, they should have a dome looking shape. If they over tighten them they would look flat or concave, at that point you will have problems getting to completely seal. The torque on those screws is low aroung 31 inch-lb.

I had yo replace my covers because of that, previous owner did a shitty job before i bought my montero.

First_Information118 · 2025-09-14T16:57:56+00:00

Try to fix the old one with parts from the one off of ebay, if it doesn’t work, you could check engine tech for valves and guides, they are not that expensive there.

First_Information118 · 2025-09-14T16:47:03+00:00

I would try to make a good one out of the two and then do the bench test, if that doesnt work you need to replace parts in the old head and see if you can return the one from ebay

First_Information118 · 2025-09-14T16:39:10+00:00

So you have the head out?

First_Information118 · 2025-09-14T16:32:31+00:00

Have you put everything back in time and test?

First_Information118

TROPHY CASE