Lonewolf1990 Posted July 2, 2020 Report Share Posted July 2, 2020 Ok Datsun fam I have a 77 620 and my thermostat housing cracked , I’m looking to find a new one and I can only find a l18 one on eBay , will that fit my motor? Will I have issues using it? Quote Link to comment
datzenmike Posted July 2, 2020 Report Share Posted July 2, 2020 Yes. Yes. The L18 housing may not have a threaded hole for the TVV for the EGR. The TVV allows EGR only when the engine is warmed up to operating temperature. But if you have to pass emissions they'll want to see it. No. If you don't have testing then you can easily run without the EGR. Do you have one of these... Hose to carburetor base and one to the EGR Quote Link to comment
KELMO Posted July 3, 2020 Report Share Posted July 3, 2020 Hey Mike, that Thermal Vacuum Valve is broke (I'm here to help). Any pics of the cracked housing? Is it the upper or lower? Could still be available OEM. I got some recently...will have to pull them out as they still have the part #'s. Quote Link to comment
EDM620 Posted July 3, 2020 Report Share Posted July 3, 2020 I broke the TVV for my motor (3 port version) and found that the part is long discontinued. Since I'm not having to concern with meeting emissions tests (you might not either as is >25 years old) I just plugged the port - already deleted the EGR. Quote Link to comment
datzenmike Posted July 3, 2020 Report Share Posted July 3, 2020 1 hour ago, KELMO said: Hey Mike, that Thermal Vacuum Valve is broke (I'm here to help). It's OK I was deleting it and why there is a pipe plug in the hole. Looks better. 28 minutes ago, EDM620 said: I broke the TVV for my motor (3 port version) and found that the part is long discontinued. Since I'm not having to concern with meeting emissions tests (you might not either as is >25 years old) I just plugged the port - already deleted the EGR. Be sure to keep the vacuum advance working past it. Quote Link to comment
EDM620 Posted July 3, 2020 Report Share Posted July 3, 2020 14 minutes ago, datzenmike said: keep the vacuum advance working past it. Yup, put in a vac line for the dizzy. All my emissions are now either deleted or routed appropriately, cleaned up nicely. Lotsa crap pertains just to the EGR system. Quote Link to comment
banzai510(hainz) Posted July 4, 2020 Report Share Posted July 4, 2020 I never try to remove those housings if not needed mime broke taking the temp sender out so now I have spare housings and the 16mm hex nut to hold the temp sender Quote Link to comment
KELMO Posted July 5, 2020 Report Share Posted July 5, 2020 Two hole style: Single hole style: Both are still available from your local dealer. If they tell you they are not, shoot me a PM. 1 Quote Link to comment
datzenmike Posted July 5, 2020 Report Share Posted July 5, 2020 Also three hole cover design on all L series from '79 on. If you get a used one you must have the matching cover. Run them over some sand paper on glass to improve the mating surfaces. Clean bolt threads and use anti seize on them. Temp senders are all the same so don't break one just to swap them. 1 Quote Link to comment
banzai510(hainz) Posted July 6, 2020 Report Share Posted July 6, 2020 Use anti seize on the bolt holes 1 Quote Link to comment
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