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PT81Jan last won the day on January 31 2016

PT81Jan had the most liked content!

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About PT81Jan

  • Rank
    Senior Member, have way too much spare time on my hands
  • Birthday 04/12/1971

Profile Information

  • Gender
  • Location
    Germany; Friedrichshafen
  • Interests
    Especially Bikes and Cars of the 30s and 40s with Flathead engines (others are also welcome!)
  • My Project Cars
    - 1939 Plymouth PT81 Pickup Truck<br />
    - (1942 HD-WLA)

Contact Methods

  • Biography
    born 1971, married, children, 1st occupation: patternmaker, 2nd occupation: engineering technician
  • Occupation
    Designer / Engine Development


  • Location
  • Interests
    Still love my PT81

Recent Profile Visitors

475 profile views
  1. Glove Box Door ?

    Same here, although the door springs are pretty good. I mounted 2 universal magnets (red arrows) to the corners of the box. The have got threaded pins on the rear. Tuck in, nut on it (yellow arrow), done. Diameter approx 1/4". Strong enough to keep the door closed, but not too strong which allows to open the door without much force. Got them from a DIY store.
  2. I at least would think about to pay 400 $, if I needed one and it were not too far away. The flathead 6es which were (seldom) offered here in the near past were not less than 1000 €... You lucky guys Enviously looking over the pond, Jan
  3. Exhaust Routing for Duals

    A bit theory regarding the cross pipe question: Due to the way of operation of engines (combustion strokes) a pulsation of the exhaust gas arises in the exhaust pipe. In case there are 2 (or more) pipes the job of a cross over pipe (= interference pipe) mainly is to amplify and synchronize the pulsation of the different strokes. If properly designed, this achieves a charging effect. Aim is to create a negative pressure just when an exhaust valve opens on a specific combustion chamber. This will soak more exhaust out of this chamber than it normally will do. This in turn causes that more fresh gas can be soaked into the combustion chamber, which leads to an increased combustion an thus an increased engine performance.If the arrangement of the interference pipe is not properly done this will cause a contrary effect. Length, diameter and position of the cross over pipe have got influence on that effect. With that it is possible to influence in which speed range the engine develops its best performance. In case of our 6 cylinder engines you probably (just my assumption) could renounce a cross over pipe, since 3 cylinders each are working together as an unit. I assume that most folks doesn`t have the equipment (neither do I) to determine which is the best execution. I made some experience with other engines by trial and error. It really had have an (slight) effect on the performance. If someone wants to get the best achievable performance, it for sure will be worth to deal with that more closely. In case of my flathead 6 I don`t care too much, since my truck is not high performance machine Jan (P.S.: It definitely has got effect on the sound, which probably most people care about. But this was not the question here)
  4. working with plastic

    Essentially there are 3 different types of plastic: Thermoplastic, Duroplast and Elastomer Only thermoplastics can be formed by warming. The other ones will get destroyed when attempting to form them by application of heat. Unfortunately it is difficult to determine which kind of plastic you have in front of you, since there are many subtypes with different characteristics. So in doubt heat your plastic piece carefully (as DJ194950 wrote with a heat gun for example) and slightly put tension on it. If it moves, you are likely dealing with a thermoplastic. If not, your nose will tell you when to stop putting more heat onto the part ... Maybe that links gives a little insight … https://en.wikipedia.org/wiki/Thermoplastic https://en.wikipedia.org/wiki/Duroplast https://en.wikipedia.org/wiki/Elastomer
  5. Show your tools.

    Ok, here is my home made camshaft bearing removing and installation tool. There are certainly more professional tools available . But for someone who does a bearing swap one or two times in a decade it might be worth to spent a little bit time and just little money to fabricate a tool himself. (By the way it is very satisfactory, if it works well.) I personally don`t like solutions that works like a slide hammer. If someone is not practiced, the risk is high to damage the new bearings. So this tool works as a press tool. A nylon piece fits pretty precise to the inner diameter oft he bearing. Just enough play that it doesn`t stick, once the bearing is pressed in. And close enough to avoid any tilt. A thick aluminum disc presses on the front edge of the bearing. The diameter of this disc is slightly smaller than the outer diameter oft he bearing. That to avoid any sticking to the bearing bore in the crankcase. Another aluminum piece with a large champfer works as a counter piece. And finaly a simple threaded rod is used to transmit the pressing force. Maybe that is nothing new but it did its job at my engine pretty well.
  6. a new noise

    Since I could not determine the main, piston pin and connecting rod bearings as a source (from underneath with the oilpan removed) the only bearing(s) which could be the source were the cam bearings. Did pull and disassemble the engine then. I do not know another proper way to check them while the engine is installed.
  7. a new noise

    My engine had a clacking noise some month ago pretty similar to your description. Smooth / absolutely no noise while idling. I could cause this while accelerating and letting off the throttle, too. According to the noise I first was thinking of a bad piston pin bearing. But I noticed a low oil pressure while idling when the engine was hot at he same time. Before the noise I had a pretty good oil pressure at any rpm. A bad piston pin bearing would barely have an effect on the oil pressure in my opinion. A bad connecting rod bearing will for sure. Both the pin and conrod bearings can be checked when removing the oil pan. In my case it turned out to be damaged camshaft bearings which meant to completely disassemble the engine ... Did you notice any changes on the oil pressure of your engine ? If not, you maybe will be lucky in misfortune. Just my thoughts - Good luck !
  8. Off topic hobbies

    Yes they indeed had a lot of fun !!! (Me too ) Seems it did not harm them.Today my boy (on the rear seat) is riding his own motorcycle.
  9. Off topic hobbies

    For me it`s motorcycles, too 1942 HD WLA 1977 Yamaha XT500 Wife`s 1997 HD Sportster Russian Dnepr with BMW engine 50s NSU Cycle with auxiliary engine / belt drive
  10. My wife's gotta be the absolute best :)

    Supplement: I just read aloud to my wife what I have commented, which brought me at least 100 points for today But she told me not to forget to mention the many oily pants and the terrible smell of paint thinner, and the .....and ... I am really sorry about your bad luck, this is frustrating. But believe me, once you turn the key for the first time and you drive for a dinner with your wife, that all is forgotten ! Good luck !
  11. My wife's gotta be the absolute best :)

    Hey that`s a nice comment ! We are always talking about the issues with our mopar stuff, discuss every technical detail. We spend hours and hours in our garage or workshop on our vehicles and just take a break when the finished lunch is calling us. By the way we besiege the house with parts of our vehicles and use the oven in the kitchen to heat a part to get the bearing out ... But how often do we talk about the "better half of us" that endures our passion ... ? Anyway, I also besieged the guest room with the fenders, my boys room (destiny provided that he moved together with his girl at that time ...mom had tears in her eyes but what a luck for my truck ...hahaha) and the front nose has been in the living room for 9 month or so. So I just agree - THANK YOU WIFES !!! O.k., she wasn`t always glad while the pieces where laying around, but when we go for a ride with the finished truck today and I see the satisfied shine in her eyes, we both know that everything is worth it.
  12. Oil filter

    Hope this works for you ! Schöne Grüße zurück ! Jan
  13. Oil filter

    Hallo Thom, unfortunately I do not have a cross reference filter No. for you, I do have another filter size. But had the same problem which was pretty easy to solve. The Baldwin filter element which was inside is no longer available. The only cross reference element what I found has been expensive due to shipping and customs fee to Germany ( you know ...) and additionally did not have the same dimensions. Took the Baldwin element to an auto supplies shop just around the corner. These shops usually have professional cross reference data bases. With the number on it and the dimensions (height, outer diam., inner diam.) it has been an easy thing for them to find 3 different filter elements. 2 surprisingly have been in their store (Mann filter and Mahle) ! Perfect fit, each about 10€. Couldn`t believe to get such a thing that easy in Germany ! Maybe worth an attempt ? Jan
  14. Head bolts

  15. dodge 23" engine versus a cranbrook '53 engine

    Hey Franky, I do not have an answer to your question regarding interchanging Dodge/Plymouth (engine) parts. But I well do know your pain since I am located in Europe, too. I doubt that it is cheaper to buy from an European dealer, because they have to pay for shipping and customs fee, too. Sure they can combine shipping, but additionally of course they want to earn money with those spare parts... The question is, how often do we need basic engine parts ? Hopefully not too often. Mostly you need parts for maintenance, e.g. gaskets. Some examples how I try do make life a bit easier: Gaskets: Most time I need a replacement gasket, then I need it now ! ... I bought some sheets of paper gasket. Available in different thickness and for different purpose. You easily can cut them out with a sharp knife or scissors. Oilpan gasket: made out of a cork plate from the hardware store. Cut out two sets more... About 8 € for a lot of gasket sets. Works well. Exhaust gaskets: Forget to find a material and doing it by yourself. Ordered a spare set for the next time I need it. Same with brake cylinders: they are that cheap, that you have to order them in the US despite shipping and customs fee. Order one more, you will never need it then ;-) Seal rings, ball bearings: Surprisingly some metric standard parts fits to our vehicles. Bought shaft seal rings just around the corner for the front case cover or rear end shafts. Plug an play ! Same with the generator bearing. Bought a metric one - fits perfect. Alternatively, if somebody with a lathe is available, a sleeve can be made to fit the metric thing. Hope that helps a bit ? Good luck ! Shared pain is half of the pain Jan