I just finished doing head gaskets on my 91 Toyota 4Runner. I'm having a problem with it overheating when I put a load on it. Like accelerating up a hill. It also seem to have a little miss to it . I just pulled the timing cover back off and my marks line up. I put new plug wires on. The water pump I replaced about 8 months ago.Any ideas as to why I'm over heating ?

20

Asked by Aug 12, 2015 at 01:05 PM about the 1991 Toyota 4Runner 4 Dr SR5 V6 4WD SUV

Question type: Maintenance & Repair

Overheating problem on 91 Toyota 4Runner

7 Answers

83,265

Radiator flow restricted, radiator hoses collapsing under high flow, head warped, head gasket put on wrong, cooling fan pushing instead of pulling air.

89,855

I would look at the radiator being plugged, or thermostat hanging up..

20

I took the thermostat out , 2 weeks ago I was driving it with no heating problems . I triple checked the gaskets before I put them on . It just blew a head gasket , the temp never got to hot to warp anything. I checked them with a straight edge.

20

I watched the water flow with the cap off , It seemed to move ok . The fan is on correctly.

83,265

So you took the thermostat out and the overheat problem went away, that would tell me that you have a faulty thermostat.

20

No the heating problem did not go away when I removed the thermostat

83,265

Then have the radiator flow tested. It may look like it is flowing but when the load comes on it is not.

Your Answer

Add photo

Related Questions

4Runner

Looking for a Used 4Runner in your area?

CarGurus has 20,766 nationwide 4Runner listings starting at $2,495.

ZIP:

Search Toyota 4Runner Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Toyota 4Runner Experts

#1 Kurt Burton
Kurt Burton
Reputation 1,110
#2 azurro
azurro
Reputation 630
#3 kbro
kbro
Reputation 600
View All

Related Models For Sale

Used Toyota Land Cruiser
18 Great Deals out of 1,182 listings starting at $4,095
Used Ford Explorer
1,137 Great Deals out of 71,754 listings starting at $799
Used Nissan Pathfinder
504 Great Deals out of 24,573 listings starting at $1,599
Used Ford F-150
3,078 Great Deals out of 208,275 listings starting at $1,200
Used Jeep Wrangler
527 Great Deals out of 18,438 listings starting at $2,900
Used Toyota Camry
1,203 Great Deals out of 96,015 listings starting at $1,250

Used Cars For Sale

2017 Toyota 4Runner For Sale
1,246 listings starting at $33,798
2016 Toyota 4Runner For Sale
46 Great Deals out of 11,533 listings starting at $26,983
2015 Toyota 4Runner For Sale
60 Great Deals out of 1,159 listings starting at $23,994
2014 Toyota 4Runner For Sale
32 Great Deals out of 872 listings starting at $21,995
2013 Toyota 4Runner For Sale
35 Great Deals out of 806 listings starting at $17,995