Our Customers Say:

  • Just wanted to give a big thanks for the order! Arrived in record time, and appreciate the bonus ... read more

    Ted

  • Gday manny received fj40 order today and all is there and everything is perfect thanks for your help ... read more

    cheers luke

  • Great Customer Service !!! It is nice to find a company that has Integrity !!! Thank You !!!

    Tim Fox

  • I just recieved my first order from CCOT - It got here in one day - !!! - and It was exactly right! ... read more

    Wayne Doyle

  • Thanks again for your awesome service - I'm a big fan of your shop. You're really helping me ... read more

    Cheers, Brad

  • Thanks, you guys rock!

    Steve

  • By the way....you guys are awesome at Coolcruisers.

    Brenda

  • Manny .....Radiator was waiting for me when I got home Fri. P.M. .....all new hoses ( from a ... read more

    Gary

  • I received my order in record time and have already installed the parts - perfect fit! Thanks much.

    Dean

  • Thank you, Manny. By the way. I love the new lift. WOW! It's awesome!

    Craig

  • Thank you. The rear quarter panels arrived safe and sound. Better than I had hoped for. I'll be ... read more

    Jim

  • Great customer service!!!! Keep it up!!!!!

    Mel

  • I have finished installing all of my CoolCruiser weatherstrip around both front doors and the three ... read more

    Lenny

  • I just finished installing my CCOT Replica gas tank, and it's one of the best fitting ... read more

    Craig

  • Just whant to say thank you to all at ccot received my order and it is great to deal with such a ... read more

    Quartus Reyneke

  • I have restored a number of cars as a hobby. The restoration process of my FJ40 however has been ... read more

    Jan, Dubai, UAE

  • I just wanted to really thank Coolcruisers for all of your help with everything. Everything you ... read more

    Alistair Parr

  • Hi there,have received my order today, thanks for your excellent service. The parts are perfect, ... read more

    Peter Foster

  • Just a note to thank you for the excellent parts and service. The order arrived in Montana in 3 ... read more

    Thanks again, Kirk

  • I got the parts I ordered. They are fantastic! Nice quality and they appear to fit well. Thanks for ... read more

    Blair Bishop

  • Thank you for your amazing help, I received my order today and am very happy with your service and ... read more

    Big Cheers from Australia, Tony

  • Just wanted to say Thank You! I won a set of FJ-40 Window hinges Cool Cruisers donated to the Raffle ... read more

    Jerry

  • RECEIVED MY ORDER TODAY WAS AS USUAL PERFECT AND IS PART OF THE LAST STAGES TO COMPLETE MY SONS 71 ... read more

    MLMIII

  • Just letting you know that I received my order today. Can't believe how quick it came. Thank you ... read more

    Aaron

  • Just installed my designer HFS lift kit and love it.

    Mark

  • Just wanted to thank you for making this replacement gas tank available. Fits a 1976 FJ40 ... read more

    Jim

  • Thanks guys I just received my order everything looks spot on.. I appreciate your awesome packing ... read more

    Julian

  • FYI, the last shipment from you arrived today and as expected, the quality of the parts is ... read more

    Cheers, Robert, UAE

  • Manny, Radiator install went great and FJ60 is running cool again thanks to Cool Cruisers! ... read more

    Semper Fidelis, Chris

  • just wanted to let you know the parcel arrived today with no issues. Top quality parts and truly ... read more

    Cheers, Robert, Dubai

  • Parcel arrived today thank you. The rear door repair sections look great.

    Cheers, Lawrence from Australia

  • Just wanted to say thanks for the super fast shipping, right parts shipped, and cool poster with ... read more

    Chad Helena, MT

  • I received my parcel this morning 10.00am Monday morning, doesn’t get much better than that, thanks ... read more

    Regards, Troy from Australia

  • Received my order in short order and it worked great..........Thanks, You guys are great.

    Phil Zito

  • I just got a packages from you. All perfect. Thank you very much. You have +1 regular customer from ... read more

    Best regards, Alexey

  • Mary package arrived today. Very pleased with the quality of the parts and the prompt delivery.

    Ken from Australia.

  • Good Morning Manny. Just wanted to let you know the shipment was received yesterday. I appreciate ... read more

    Sandra Latimer

  • I don't believe it, my 76fj40 was leaning to the driverside a lot and it seemed worse after a ... read more

    Charles Rogers

  • I'd like to thank you for all your support and assistance in helping build the suspension of my ... read more

    JC Mosquera

  • Just to follow up: UPS delivered the seat covers on Friday. And you are right: Oscar is really ... read more

    R Evers

  • Dear Cool Cruisers, I just have to say your Customer support on this issue was Awesome! Y’all are ... read more

    Jim Wolff

  • Manny, I want to thank you & staff for the 3/4 tub arriving intact & undamaged! A real nice job! ... read more

    Dave

  • Hey Manny, Got the tub and it is awesome! thanks

    jd

  • Mary Beth, Please pass on my appreciation to all involved in the purchase, distribution and ... read more

  • My goods arrived today which is 2 days earlier than the scheduled time. Upon opening the packages I ... read more

    Ken White, Australia

  • Dear Mary Beth,

    This is to let you know that I have received both boxes and also that I am very pleased with all the items you have supplied me.Thank you for all your kind assistance. Best regards Chanaka, Sri Lanka

  • I wanted to send a Thank You to Manny and Mary Beth at Cool Crusiers of Texas for all the support ... read more

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Head, "Valve Job", when is it necessary?

Answer:

A valve job is removing the cylinder head(s) from the engine so the valves, guides and seats can be refurbished to restore compression and oil control. A valve job may be necessary by the time an engine has 80,000 or more miles on it, or to fix a "burned valve," compression or oil burning problem.

Before we describe all the steps that a typical valve job involves, we should warn you that some shops don't necessary do all the steps. In other words, you get what you pay for. A "cheapie" valve job might skip a lot of things that saves you a few dollars in the short run, but may end up costing you a lot more in the long run. So look for a shop or service facility that does quality work.

A valve job typically begins by disassembling, cleaning and inspecting the cylinder head. Cast iron heads are "Magnafluxed" to check for hairline cracks. This involves applying a strong magnetic field to the head and sprinkling iron powder on it. Cracks disrupt the magnetic field and attract the iron powder, making invisible cracks easy to see.

Cracks are bad news because they can leak coolant into the combustion chamber damaging the cylinders and/or causing the engine to lose coolant and overheat. If cracks are found in any critical areas of the head, the head must either be repaired or replaced. Cracks in cast iron heads are most often repaired by "pinning" (installing a series of overlapping threaded pins).

If a head has been repaired (pinned or welded), most shops will usually pressure test the head afterward to make sure there are no leaks. Some may also apply a sealer compound to the inside of the water jackets as added insurance against future leaks.

Once the head passes this point, it is also checked for flatness. The surface of the head must be flat to seal the head gasket against the block. Excessive warpage, roughness or any damage can cause the head gasket to fail. If the head exceeds the maximum allowable out-of-flatness specs, it must be resurfaced or replaced. Usually there's enough metal in the head to allow for a certain amount of resurfacing.

Next come the valves, guides and seats. The guides are checked for wear. They're almost always worn, so they either need to be replaced, relined or knurled (a process whereby grooves are cut into the inside diameter of the guides to decrease the bore size). Few shops knurl guides anymore. Most install new guides, guide liners or bore out the old guides to accept new valves with oversized stems. Aluminum heads have cast iron or bronze guides that can be replaced but most cast iron heads do not.

If the valves are to be reused, they will be inspected, checked for straightness then refaced. Many shops automatically replace all the exhaust valves to reduce the risk of failure (exhaust valves run much hotter than intakes and are much more likely to fail).

The seats in the head are either cut or ground to restore the sealing surface. If a seat is cracked or too badly worn to be refaced, the seat must be replaced. If that isn't possible, then the entire head must be replaced.

The valve springs are all inspected and tested to make sure they are still capable of maintaining proper pressure. The spring retainers, keepers and other hardware is likewise inspected. Any worn or damaged components are replaced. New valve guide seals are always used.

The valves are then installed in the head and shimmed to restore proper valve height. This is necessary because machining the valves and seat alters their dimensions. Valve height is important because it affects valvetrain geometry and guide wear...

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