Question about Cars & Trucks
Steam out the exhaust or oil in the coolant or coolant in the oil or unexplained loss of coolant or erratic overheating issues indicate a possible leaking head gasket(s)
Posted on Apr 30, 2013
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
I would highly recommend that you go to the local parts store and purchase a Haynes Manual for your vehicle, they are around $ 25.00 Canadian. As when you do your head gasket you wil need to remove your timing belt and this is a procedure in it's self. then you will neen certain torque settings. This manual will provide you with all of this information step by step. they are designed for the do it yourselfer. They also cover many other issues that you may come across through out the ownership of your vehicle. I know that the last ting you need is an added exspence but these manuals are well worth the small investment. There is a site that you can find hrough google search that you can find factory service repair manuals for your vehicle, however they only have a layout for a 4 cylinder engine in there drawings and this is alot different then the 6 cylinder. As the procedure for repairs is totally different. I hope that this helps and that you take the time to rate any solutions you receive. Good Luck.
Posted on Oct 29, 2008
may be oil feed to cylinder head replace gasket
Posted on Apr 20, 2009
The toyota previa uses a formed silicone gasket for the valve cover and the cover is held in place by metric shoulder bolts ( 10mm). The valve gasket leaks because you can't get enough preload on the bolts to re-seat the old gasket when it gets old and shrinks. The shoulder bolts only allow you to tighten the gasket enough to seat the shoulder on the bolt. If you continue to torque down the suspected bolts, you will snap the bolt off ( don't ask me how I know this ). You can either 1.)replace the old gasket with a new one or 2.) remove the existing bolts around the leak area and put in new metric bolts that do not have a shoulder. You may want to put in a small sleeve into the existing bolt hole but shorter than the thickness of the valve cover to account for the smaller diameter bolt. You can now torque down the bolt and get enough preload to seal the valve cover without removing the old gasket. Make sure you use a torque wrench ( in-lbs) or be very careful not to snap these small valve cover bolts.
Posted on Jul 15, 2009
It's a big job if you've never done one before. If you have and are familiar with this type of thing it should take about 8 - 10 hours. I strongly suggest that when you do you take the heads to a machine shop to check them over and HAVE THE VALVES ADJUSTED! They use pain in the neck shim system that has to be adjusted after 60? k otherwise you'll burn a valve.
Posted on Oct 01, 2009
SOURCE: i have a 1987 toyota
The 22R engine is one of the best engines Toyota built.
With the head off, you should have had the head gasket surface machined and the head checked pressure checked for cracks. It seems you did so.
I can only assume, you MAY have put the bolts back in without bowing out the cylinder block bolt holes before installing the bolts. These bolt holes fill with oil and antifreeze when you remove the head.
Doesn't matter how careful you are, the bolt holes always fill with fluid.
If so, the bolt torque would be reached before full clamping of the cylinder head. Worst of all, the block could have been cracked by the hydraulic pressure in the bolt hole as you tightened the bolt.
Posted on Jan 25, 2011
Tips for a great answer:
Nov 05, 2017 | Toyota Cars & Trucks
Oct 09, 2017 | 1992 Toyota Camry V6
Mar 07, 2012 | 1987 Toyota Pickup
Mar 26, 2011 | Toyota Camry Cars & Trucks
Mar 17, 2010 | 2003 Dodge Caravan
Feb 08, 2010 | 1998 Toyota Tacoma
Oct 18, 2009 | 1995 Toyota T100 Xtracab
Jun 09, 2009 | 1991 Toyota Pickup
Apr 20, 2009 | 2003 Toyota Camry
40 people viewed this question
Usually answered in minutes!